Abstract

An example system is configured to convert a first digital signal having a first sampling rate into a second digital signal having a second sampling rate that is different from the first sampling rate. The system includes an input circuit to receive the first digital signal at the first sampling rate; a fractional finite impulse response (FIR) circuit configured to shift the first digital signal by a value corresponding coefficients of the FIR circuit, with the value being based on an integer value or a non-integer value; memory to store the coefficients for the FIR circuit; and processing circuitry to receive information corresponding to the second sampling rate, to obtain the value based on the information, to obtain the coefficients from the memory based on the value, and to provide the coefficients to the FIR circuit.

IPC Classes  ?

• H03H 17/06 - Non-recursive filters
• H03H 17/02 - Frequency-selective networks

Abstract

An example system includes a signal generator to output signals based on multiple carrier frequencies; a wired transmission medium for carrying the signals, where the wired transmission medium is configured as open ended to produce reflections on the wired transmission medium of the signals; and a signal analyzer to receive the reflections and to determine a transmission time of a signal along the wired transmission medium based on the reflections. The signal analyzer is configured to perform operations that include performing a search based on an estimated transmission time of the signal along the wired transmission medium and the reflections to determine the transmission time. The search is to determine which of multiple candidate transmission times to select for the transmission time.

IPC Classes  ?

• H04L 43/0852 - Delays

Abstract

An example method includes following operations: (i) receiving a device signal from a device under test (DUT); (ii) setting an attenuation value; (iii) applying the attenuation value to the device signal to produce an attenuated device signal for a frequency spectrum analyzing device, where the frequency spectrum analyzing device produces a noise signal and intermodulation interference; (iv) obtaining a power spectral density value, where the power spectral density value comprises a power, at a frequency value, of a combined signal that is based on the attenuated device signal, the noise signal, and the intermodulation interference; (v) repeating operations (ii), (iii), and (iv) one or more times to produce multiple power spectral density values; (vi) repeating operations (i), (ii), (iii), (iv), and (v) one or more times to add power spectral density values to the multiple power spectral density values; and (vii) obtaining a power spectral density of the device signal.

IPC Classes  ?

• G01R 23/18 - Spectrum analysisFourier analysis with provision for recording frequency spectrum
• G01R 27/30 - Measuring attenuation, gain, phase shift, or derived characteristics of electric four-pole networks, i.e. two-port networksMeasuring transient response with provision for recording characteristics, e.g. by plotting Nyquist diagram
• G01R 29/26 - Measuring noise figureMeasuring signal-to-noise ratio

Abstract

An example method includes the following operations: (i) receiving a device signal from a device under test (DUT); (ii) setting an attenuation value; (iii) applying the attenuation value to the device signal to produce an attenuated device signal for a frequency spectrum analyzing device, where the frequency spectrum analyzing device produces a noise signal; (iv) obtaining a power spectral density value using the frequency spectrum analyzing device, where a power spectral density comprises a power, at a frequency value, of a combined signal that is based on the attenuated device signal and the noise signal; (v) repeating operations (ii), (iii), and (iv) one or more times to produce multiple power spectral density values; (vi) repeating operations (i), (ii), (iii), (iv), and (v) one or more times to add power spectral density values to the multiple power spectral density values; and (vii) obtaining a power spectral density of the device signal.

IPC Classes  ?

• G01R 31/28 - Testing of electronic circuits, e.g. by signal tracer
• G01R 23/18 - Spectrum analysisFourier analysis with provision for recording frequency spectrum

Abstract

An example process determines a first error vector magnitude (EVM) of a signal output by a device under test (DUT). The process includes adding attenuation on a signal path between the DUT and a vector signal analyzer (VSA), where the attenuation is changeable; measuring, at the VSA, at least two second EVMs for different values of attenuation of the signal output by the DUT, where the at least two second EVMs are corrupted by noise from the VSA, and where each of the at least two second EVMs is based on two or more measurements; and determining the first EVM based on a linear relationship that is based on the first EVM, the at least two second EVMs, and a function based on the attenuation, where the first EVM is without at least some of the noise from the VSA.

IPC Classes  ?

• H04L 1/20 - Arrangements for detecting or preventing errors in the information received using signal-quality detector
• H04L 1/24 - Testing correct operation
• G01R 31/317 - Testing of digital circuits

Abstract

A system is configured to test a device. The device is or includes a MIMO wireless device having antennas. The antennas include at least two antennas for receiving or transmitting. The system includes a test instrument and probes having wired connections to the test instrument over which signals are communicated between the probes and the test instrument. A probe is configured to communicate signals with an antenna on the device wirelessly in a reactive near-field region of the antenna.

IPC Classes  ?

• H04B 17/10 - MonitoringTesting of transmitters
• H04B 17/318 - Received signal strength
• H04B 17/14 - MonitoringTesting of transmitters for calibration of the whole transmission and reception path, e.g. self-test loop-back
• H04B 7/0413 - MIMO systems

Abstract

An example process determines a first error vector magnitude (EVM) of a signal output by a device under test (DUT). The process includes adding attenuation on a signal path between the DUT and a vector signal analyzer (VSA), where the attenuation is changeable: measuring, at the VSA, at least two second EVMs for different values of attenuation of the signal output by the DUT, where the at least two second EVMs are corrupted by noise from the VSA, and where each of the at least two second EVMs is based on two or more measurements; and determining the first EVM based on a linear relationship that is based on the first EVM, the at least two second EVMs, and a function based on the attenuation, where the first EVM is without at least some of the noise from the VSA.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting

Abstract

An example test system includes memory (e.g., one or more memory devices) storing (i) instructions that are executable, and (ii) a mapping function that relates first error vector magnitudes (EVMs) for first symbols to second EVMs for the first symbols, where the first EVMs are corrupted by radio frequency (RF) noise and the second EVMs are corrupted by both RF noise and symbol decoding errors. The test system also includes a decoder to receive a signal from a device under test, and to obtain a third EVM for a second symbol that is based on the signal, where the third EVM is corrupted by both RF noise and a symbol decoding error. One or more processing devices are configured to execute the instructions to adjust the third EVM using the mapping function to correct the symbol decoding error in the third EVM.

IPC Classes  ?

• H04B 17/345 - Interference values
• H04B 1/04 - Circuits
• H04L 27/26 - Systems using multi-frequency codes

Abstract

Systems and methods are provided for systems and methods for using pulsed radio frequency (RF) signals to stimulate one or more modulated scattering probes (MSPs) to enable measurements of distance to and planarity of a surface of a wireless device under test (DUT).

IPC Classes  ?

• G01R 29/10 - Radiation diagrams of antennas
• H04B 17/10 - MonitoringTesting of transmitters
• G01R 29/08 - Measuring electromagnetic field characteristics

Abstract

System and method for compensating for power loss due to a radio frequency (RF) signal probe mismatch in conductive RF signal testing of a RF data signal transceiver device under test (DUT). Sourcing the RF test signal with the RF vector signal transceiver at multiple test frequencies enables isolation of and compensation for power loss due to a mismatch between the RF signal probe and RF DUT connection based on predetermined losses of the RF signal path.

IPC Classes  ?

• G01R 31/302 - Contactless testing
• H04B 3/48 - Testing attenuation

Abstract

System and method for implementing a time-switched MIMO signal analysis using a single RF signal receiver to capture the multiple incoming data packet signals. In accordance with example embodiments, like portions of repetitive data slots may be captured with a periodicity equal to that of their host repetitive data frames.

IPC Classes  ?

• H04L 1/18 - Automatic repetition systems, e.g. Van Duuren systems
• H04B 7/0417 - Feedback systems
• H04B 7/08 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
• H04B 7/0456 - Selection of precoding matrices or codebooks, e.g. using matrices for antenna weighting

Abstract

System and method for implementing a time-switched MIMO signal analysis using a single RF signal receiver to capture the multiple incoming data packet signals. In accordance with example embodiments, like portions of repetitive data slots may be captured with a periodicity equal to that of their host repetitive data frames.

IPC Classes  ?

• H04L 1/24 - Testing correct operation
• H04B 7/0413 - MIMO systems
• H04L 1/08 - Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system

Abstract

System and method for measuring path loss of a conductive radio frequency (RF) signal path used in testing a RF data signal transceiver device under test (DUT) with a RF vector signal transceiver. A path loss measurement may be performed by initially leaving an open connection at the RF signal path end normally connected to the DUT during DUT testing. Sourcing the RF test signal with the RF vector signal transceiver at multiple test frequencies avoids need for additional testing with shorted and loaded connections at the RF signal path end.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• H04B 17/309 - Measuring or estimating channel quality parameters

Abstract

System and method for compensating for power loss due to a radio frequency (RF) signal probe mismatch in conductive RF signal testing of a RF data signal transceiver device under test (DUT). Sourcing the RF test signal with the RF vector signal transceiver at multiple test frequencies enables isolation of and compensation for power loss due to a mismatch between the RF signal probe and RF DUT connection based on predetermined losses of the RF signal path.

IPC Classes  ?

• G01R 35/00 - Testing or calibrating of apparatus covered by the other groups of this subclass
• G01R 23/16 - Spectrum analysisFourier analysis
• G01R 23/15 - Indicating that frequency of pulses is either above or below a predetermined value or within or outside a predetermined range of values, by making use of non-linear or digital elements
• G01R 1/07 - Non contact-making probes

Abstract

System and method for measuring path loss of a conductive radio frequency (RF) signal path used in testing a RF data signal transceiver device under test (DUT) with a RF vector signal transceiver. A path loss measurement may be performed by initially leaving an open connection at the RF signal path end normally connected to the DUT during DUT testing. Sourcing the RF test signal with the RF vector signal transceiver at multiple test frequencies avoids need for additional testing with shorted and loaded connections at the RF signal path end.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• G01R 31/28 - Testing of electronic circuits, e.g. by signal tracer

Abstract

Systems and methods for detecting faulty elements in an active planar antenna array of an extremely high frequency (EHF) wireless communication device. A planar antenna array having a matrix of dual-polarization modulated scattering probes is disposed within a near-field region of the antenna under test (AUT). Electromagnetic energy received from the AUT is converted to a complex electrical signal that is modulated by an electrical modulation signal and radiated as a scattering signal. The resulting electromagnetic scattering signal, received and converted to an electrical signal by another antenna, is used in a holographic image reconstruction operation via a backward-propagation transformation to reconstruct the signal spectrum radiated from the surface of the AUT. Configurable (e.g., electrically) scatter probes provide maximized modulation depths (MDs) over wide frequency ranges.

IPC Classes  ?

• G01R 27/28 - Measuring attenuation, gain, phase shift, or derived characteristics of electric four-pole networks, i.e. two-port networksMeasuring transient response
• G01R 29/10 - Radiation diagrams of antennas
• H01Q 3/26 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture

Abstract

A system and method for using a wireless radio frequency (RF) data packet signaling link to enable non-link control of testing of a data packet signal transceiver device under test (DUT) in which a communication session between a tester and a DUT for purposes of testing the DUT may first be initiated by a separate, commonly available, and lower cost, communication device. Following its establishment, the tester may monitor the communication session, e.g., via wireless signal sniffing, to acquire and use associated device identification information to join the session and transmit trigger based test (TBT) data packets for initiating a test sequence within the DUT. Hence, use of a non-link capable tester to perform parametric testing of a DUT at the lowest network architecture layer, e.g., the physical (PHY) layer, may be enabled.

IPC Classes  ?

• H04W 24/08 - Testing using real traffic

Abstract

A system and method for using a wireless radio frequency (RF) data packet signaling link to enable non-link control of testing of a data packet signal transceiver device under test (DUT) in which a communication session between a tester and a DUT for purposes of testing the DUT may first be initiated by a separate, commonly available, and lower cost, communication device. Following its establishment, the tester may monitor the communication session, e.g., via wireless signal sniffing, to acquire and use associated device identification information to join the session and transmit trigger based test (TBT) data packets for initiating a test sequence within the DUT. Hence, use of a non-link capable tester to perform parametric testing of a DUT at the lowest network architecture layer, e.g., the physical (PHY) layer, may be enabled.

IPC Classes  ?

• H04B 17/19 - Self-testing arrangements
• H04B 17/29 - Performance testing
• H04B 17/00 - MonitoringTesting

Abstract

System and method for testing a wireless data packet signal transceiver device under test (DUT) in which external control circuitry manages initiation of execution by a tester of test program instructions defining multiple self-terminating test control sequences in one or more desired sequences. The test control sequences may be pre-stored in a tester for subsequent execution under control of control signals sourced externally by the external control circuitry via separate control signals.

IPC Classes  ?

• H04W 24/04 - Arrangements for maintaining operational condition
• H04W 24/06 - Testing using simulated traffic
• H04B 17/29 - Performance testing
• G01R 31/302 - Contactless testing
• G01R 31/319 - Tester hardware, i.e. output processing circuits

Abstract

System and method for testing transmission and reception performance of a data packet signal transceiver device under test (DUT). Data packet signals transmitted by a tester with a tester transmit output power (TTOP) contain trigger frames that include data corresponding to a reported tester transmit power (RTTP) of the data packet signals, and a desired received signal strength (TRSS) of DUT data packet signals to be received by the tester. Based on received signal strength of the tester data packet signals reported by the DUT (DRSS), responsive DUT data packet signals having a DUT transmit output power of RTTP-DRSS+TRSS. Successive repetitions of such tester and DUT data packet signals for multiple combinations of values of the TTOP, RTTP and DRSS enable testing transmission and reception performance of the DUT, including determining minimum and maximum DUT transmission power levels, with minimal signal interactions between tester and DUT.

IPC Classes  ?

• H04B 17/15 - Performance testing
• H04B 17/29 - Performance testing
• H04B 17/00 - MonitoringTesting
• H04B 17/309 - Measuring or estimating channel quality parameters
• H04L 12/26 - Monitoring arrangements; Testing arrangements
• G01R 31/317 - Testing of digital circuits
• G01R 31/3183 - Generation of test inputs, e.g. test vectors, patterns or sequences

Abstract

System and method of testing performance of a data packet signal transceiver (DUT). Multiple DUT signals, with each having a respective DUT transmit power (RDTPn) received by the tester and corresponding to one (IDTPn) of multiple intended DUT transmit powers, for n=1,, m, with a power equal to a minimum IDTP, maximum IDTP, or intermediate IDTP therebetween. Following association of each RDTPn with its IDTPn, a tester signal is sent having a trigger frame and tester transmit output power (TTOP). The trigger frame includes data corresponding to a reported tester transmit power (RTTP), and a desired signal strength (TRSS) of a DUT data packet signal to be received by the tester. A return DUT signal having a RDTPn is received, from which an IDTPn corresponding to the RDTPn is determined and compared to RTTP-TTOP+TRSS. Successive repetitions of such tester and DUT signals and IDTPn comparisons for multiple combinations of values of the TTOP, RTTP and DRSS enable testing reception performance of the DUT, including extracting RSSI measurements, with minimal signal interactions between tester and DUT.

IPC Classes  ?

• H04B 17/15 - Performance testing
• H04B 17/19 - Self-testing arrangements
• H04B 17/29 - Performance testing
• H04L 1/20 - Arrangements for detecting or preventing errors in the information received using signal-quality detector

Abstract

System and method for testing transmission and reception performance of a data packet signal transceiver device under test (DUT). Data packet signals transmitted by a tester with a tester transmit output power (TTOP) contain trigger frames that include data corresponding to a reported tester transmit power (RTTP) of the data packet signals, and a desired received signal strength (TRSS) of DUT data packet signals to be received by the tester. Based on received signal strength of the tester data packet signals reported by the DUT (DRSS), responsive DUT data packet signals having a DUT transmit output power of RTTP−DRSS+TRSS. Successive repetitions of such tester and DUT data packet signals for multiple combinations of values of the TTOP, RTTP and DRSS enable testing transmission and reception performance of the DUT, including determining minimum and maximum DUT transmission power levels, with minimal signal interactions between tester and DUT.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements
• H04B 17/318 - Received signal strength

Abstract

System and method of testing performance of a data packet signal transceiver (DUT). Multiple DUT signals, with each having a respective DUT transmit power (RDTPn) received by the tester and corresponding to one (IDTPn) of multiple intended DUT transmit powers, for n=1, . . . , m, with a power equal to a minimum IDTP, maximum IDTP, or intermediate IDTP therebetween. Following association of each RDTPn with its IDTPn, a tester signal is sent having a trigger frame and tester transmit output power (TTOP). The trigger frame includes data corresponding to a reported tester transmit power (RTTP), and a desired signal strength (TRSS) of a DUT data packet signal to be received by the tester. A return DUT signal having a RDTPn is received, from which an IDTPn corresponding to the RDTPn is determined and compared to RTTP-TTOP+TRSS. Successive repetitions of such tester and DUT signals and IDTPn comparisons for multiple combinations of values of the TTOP, RTTP and DRSS enable testing reception performance of the DUT, including extracting RSSI measurements, with minimal signal interactions between tester and DUT.

IPC Classes  ?

• H04B 17/21 - MonitoringTesting of receivers for calibrationMonitoringTesting of receivers for correcting measurements
• H04L 12/26 - Monitoring arrangements; Testing arrangements
• H04B 17/318 - Received signal strength
• H04B 17/29 - Performance testing
• H04B 17/19 - Self-testing arrangements
• H04B 17/15 - Performance testing

Abstract

A method for controlling block error rate (BLER) testing of a cellular communication device for a system having a fixed number of BLER data packets. Alternating sequences of downlink (DL) data packets have packet identifiers with first and second states, and are separated by additional sequences of DL data packets having packet identifiers with the first state, thereby enabling control of BLER testing of the device to ensure a reliable accumulated count of DL data packets received by the device having packet identifiers only with the second state.

IPC Classes  ?

• H04L 1/20 - Arrangements for detecting or preventing errors in the information received using signal-quality detector
• H04L 1/24 - Testing correct operation
• G01R 31/302 - Contactless testing

Abstract

A method for controlling block error rate (BLER) testing of a cellular communication device for a system having a fixed number of BLER data packets. Alternating sequences of downlink (DL) data packets have packet identifiers with a first state, and are separated by additional sequences of DL data packets having packet identifiers with a second state, thereby enabling control of BLER testing of the device to ensure a reliable accumulated count of DL data packets received by the device having packet identifiers only with the second state.

IPC Classes  ?

• H04L 1/20 - Arrangements for detecting or preventing errors in the information received using signal-quality detector
• H04L 1/24 - Testing correct operation
• G01R 31/302 - Contactless testing

Abstract

Systems and methods for detecting faulty elements in an active planar antenna array of an extremely high frequency (EHF) wireless communication device. A planar antenna array having a matrix of dual-polarization modulated scattering probes is disposed within a near-field region of the antenna under test (AUT). Electromagnetic energy received from the AUT is converted to a complex electrical signal that is modulated by an electrical modulation signal and radiated as a scattering signal. The resulting electromagnetic scattering signal, received and converted to an electrical signal by another antenna, is used in a holographic image reconstruction operation via a backward-propagation transformation to reconstruct the signal spectrum radiated from the surface of the AUT. A comparison of this reconstructed signal spectrum with a reference signal spectrum radiated from the surface of a known good antenna array enables detection of faulty antenna elements within the AUT.

IPC Classes  ?

• H04B 17/10 - MonitoringTesting of transmitters
• H04B 17/19 - Self-testing arrangements
• H04B 17/00 - MonitoringTesting
• H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart
• H01Q 21/24 - Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction

Abstract

Systems and methods for detecting faulty elements in an active planar antenna array of an extremely high frequency (EHF) wireless communication device. A planar antenna array having a matrix of dual-polarization modulated scattering probes is disposed within a near-field region of the antenna under test (AUT). Electromagnetic energy received from the AUT is converted to a complex electrical signal that is modulated by an electrical modulation signal and radiated as a scattering signal. The resulting electromagnetic scattering signal, received and converted to an electrical signal by another antenna, is used in a holographic image reconstruction operation via a backward-propagation transformation to reconstruct the signal spectrum radiated from the surface of the AUT. A comparison of this reconstructed signal spectrum with a reference signal spectrum radiated from the surface of a known good antenna array enables detection of faulty antenna elements within the AUT.

IPC Classes  ?

• H01Q 3/26 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture
• H01Q 21/00 - Antenna arrays or systems

Abstract

Systems and methods for detecting faulty elements in an active planar antenna array of an extremely high frequency (EHF) wireless communication device. A planar antenna array having a matrix of dual-polarization modulated scattering probes is disposed within a near-field region of the antenna under test (AUT). Electromagnetic energy received from the AUT is converted to a complex electrical signal that is modulated by an electrical modulation signal and radiated as a scattering signal. The resulting electromagnetic scattering signal, received and converted to an electrical signal by another antenna, is used in a holographic image reconstruction operation via a backward-propagation transformation to reconstruct the signal spectrum radiated from the surface of the AUT. A comparison of this reconstructed signal spectrum with a reference signal spectrum radiated from the surface of a known good antenna array enables detection of faulty antenna elements within the AUT.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• H04B 17/10 - MonitoringTesting of transmitters
• G01R 29/10 - Radiation diagrams of antennas
• H04B 17/391 - Modelling the propagation channel
• H04B 17/17 - Detection of non-compliance or faulty performance, e.g. response deviations
• H01Q 3/26 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture

Abstract

Systems and methods for detecting faulty elements in an active planar antenna array of an extremely high frequency (EHF) wireless communication device. A planar antenna array having a matrix of dual-polarization modulated scattering probes is disposed within a near-field region of the antenna under test (AUT). Electromagnetic energy received from the AUT is converted to a complex electrical signal that is modulated by an electrical modulation signal and radiated as a scattering signal. The resulting electromagnetic scattering signal, received and converted to an electrical signal by another antenna, is used in a holographic image reconstruction operation via a backward-propagation transformation to reconstruct the signal spectrum radiated from the surface of the AUT. A comparison of this reconstructed signal spectrum with a reference signal spectrum radiated from the surface of a known good antenna array enables detection of faulty antenna elements within the AUT.

IPC Classes  ?

• H04B 3/46 - MonitoringTesting
• H04B 17/00 - MonitoringTesting
• H04Q 1/20 - Testing circuits or apparatusCircuits or apparatus for detecting, indicating, or signalling faults or troubles
• H04B 17/10 - MonitoringTesting of transmitters
• G01R 29/10 - Radiation diagrams of antennas
• H04B 17/29 - Performance testing
• H04B 17/18 - Monitoring during normal operation
• H04B 17/391 - Modelling the propagation channel
• H04B 17/17 - Detection of non-compliance or faulty performance, e.g. response deviations

Abstract

A system and method for controlling uses of respective tester points of access (PoAs) during wireless testing of one or more radio frequency (RF) signal transceiver devices under test (DUTs) in which one or more device identifiers are used to determine whether a DUT requesting access to one of multiple wireless PoAs is eligible to interact with the PoA receiving such request or, instead, eligible to interact with another one of the multiple PoAs and is to be redirected to such other PoA. Access by the requesting DUTs to respective PoAs may be predetermined so as to control loading of the PoAs during testing.

IPC Classes  ?

• H04W 48/00 - Access restrictionNetwork selectionAccess point selection
• H04W 8/22 - Processing or transfer of terminal data, e.g. status or physical capabilities
• H04W 88/02 - Terminal devices
• H04W 84/12 - WLAN [Wireless Local Area Networks]

Abstract

System and method for providing variable time delays with high temporal granularity and consistent broadband delay performance for testing of time-of-arrival (ToA) or angle-of-arrival (AoA) performances of radio frequency (RF) signal transceivers. Multiple delays may be imparted to a common RF signal to provide multiple delayed RF signals corresponding to RF signals originating from a source location and received at various locations having respective position coordinates relative to respective orthogonal axes, plus another delayed RF signal corresponding to a RF signal originating from the source location and received at a location at an intersection of the orthogonal axes.

IPC Classes  ?

• H04B 17/364 - Delay profiles
• H04B 17/00 - MonitoringTesting

Abstract

A method for testing a data packet signal transceiver device under test (DUT). Following initial signal communications with a DUT, timing of further transmissions by the DUT may be effectively controlled by transmitting congestive communication channel signals to cause the DUT to detect apparent communication channel activity and in response thereto delay its own signal transmissions.

IPC Classes  ?

• H04L 1/24 - Testing correct operation
• H04L 1/20 - Arrangements for detecting or preventing errors in the information received using signal-quality detector

Abstract

A method for testing a data packet signal transceiver device under test (DUT). Following initial signal communications with a DUT, timing of further transmissions by the DUT may be effectively controlled by transmitting congestive communication channel signals to cause the DUT to detect apparent communication channel activity and in response thereto delay its own signal transmissions.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements
• H04L 12/841 - Flow control actions using time consideration, e.g. round trip time [RTT]
• H04L 12/825 - Adaptive control, at the source or intermediate nodes, upon congestion feedback, e.g. X-on X-off

Abstract

A method for coordinating testing of a wireless device under test (DUT) using non-link testing resources. Coordination between the tester and_DUT is achieved by transmitting, from the tester to the DUT, predetermined numbers of data packets associated with predetermined tester identification data (e.g., MAC addresses identifying the tester transmitter). During test phases involving measurement and/or calibration of DUT transmit signals, the tester sends a number of data packets associated with one or more versions of tester identification data, in response to which the DUT performs internal operations (e.g., revising transmit power offsets). During later test phases involving validation of DUT performance, the tester sends another number of data packets associated with one or more versions of the tester identification data to inform the DUT that its testing has passed or failed, and/or is to be repeated.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements

Abstract

A method for coordinating testing of a wireless device under test (DUT) using non-link testing resources. Coordination between the tester and DUT is achieved by transmitting, from the tester to the DUT, predetermined numbers of data packets associated with predetermined tester identification data (e.g., MAC addresses identifying the tester transmitter). During test phases involving measurement and/or calibration of DUT transmit signals, the tester sends a number of data packets associated with one or more versions of tester identification data, in response to which the DUT performs internal operations (e.g., revising transmit power offsets). During later test phases involving validation of DUT performance, the tester sends another number of data packets associated with one or more versions of the tester identification data to inform the DUT that its testing has passed or failed, and/or is to be repeated.

IPC Classes  ?

• H04B 17/15 - Performance testing
• H04L 12/26 - Monitoring arrangements; Testing arrangements
• G01R 31/3183 - Generation of test inputs, e.g. test vectors, patterns or sequences
• G01R 31/319 - Tester hardware, i.e. output processing circuits
• G01R 31/317 - Testing of digital circuits
• H04B 17/10 - MonitoringTesting of transmitters
• H04B 17/29 - Performance testing
• H04W 24/06 - Testing using simulated traffic

Abstract

A method for assessing receiver signal reception performance during wireless beam steering operation of a radio frequency (RF) data packet signal transceiver capable of multiple input, multiple output (MTMO) operation. In response to transmissions of a sounding packet (SP) from a beamforming device ("beamformer"), a receiving device ("beamformee") transmits a response data packet containing matrix data representing a beamforming feedback matrix (BFM) related to signal attenuation by the wireless signal path environment through which the beamformer and beamformee are communicating. Using the matrix data, a statistical variation can be computed which is indicative of signal reception performance of the beamformee.

IPC Classes  ?

• H04B 17/29 - Performance testing
• H04B 17/26 - MonitoringTesting of receivers using historical data, averaging values or statistics
• H04B 7/0413 - MIMO systems

Abstract

A testing apparatus obtains user equipment (UE) parametric measurements with unknown and/or unavailable authentication and security information. The testing apparatus may obtain uplink and downlink parameters of a wireless device after the wireless device initiates registration while an associated timer is activated, enabling the testing apparatus to obtain additional measurement information without security information about the tested wireless device. The apparatus may also measure the UE's transmitted power level prior to the initiation of the authentication procedure. The testing apparatus may determine if a wireless device is to be tested at another frequency pair. If so, the testing apparatus redirects the wireless device to a radio resource at the other frequency pair. The testing apparatus then obtains uplink and downlink parameters for the wireless device by performing pre-registration and intra-registration measurements at the other frequency pair. The procedure is repeated until measurements for all desired frequency pairs are completed.

IPC Classes  ?

• H04W 24/08 - Testing using real traffic
• H04W 60/00 - Affiliation to network, e.g. registrationTerminating affiliation with the network, e.g. de-registration
• H04W 12/06 - Authentication

Abstract

System and method for providing variable time delays with high temporal granularity and consistent broadband delay performance for testing of time-of-arrival (ToA) or angle-of-arrival (AoA) performances of radio frequency (RF) signal transceivers. Multiple delays may be imparted to a common RF signal to provide multiple delayed RF signals corresponding to RF signals originating from a source location and received at various locations having respective position coordinates relative to respective orthogonal axes, plus another delayed RF signal corresponding to a RF signal originating from the source location and received at a location at an intersection of the orthogonal axes.

IPC Classes  ?

• H04B 17/10 - MonitoringTesting of transmitters
• H04B 17/29 - Performance testing
• H04W 24/06 - Testing using simulated traffic
• H04B 17/364 - Delay profiles
• H04B 17/00 - MonitoringTesting
• H04B 17/391 - Modelling the propagation channel

Abstract

A method for estimating receiver sensitivity of a radio frequency (RF) data packet signal transceiver device under test (DUT) that relies upon beacon request and response data packets for enabling communication links. The method comprises receiving, with a tester from the DUT, a wireless DUT beacon signal having one of a plurality of nominal DUT beacon signal frequencies, transmitting, with the tester in response to reception of the wireless DUT beacon signal, a plurality of wireless tester beacon signals having a plurality of nominal tester beacon signal frequencies and power levels, and if no DUT acknowledgment signal corresponding to one of the plurality of wireless tester beacon signals is received by the tester, then further receiving another wireless DUT beacon signal having one of the plurality of nominal DUT beacon signal frequencies, further transmitting the plurality of wireless tester beacon signals with a plurality of increased nominal tester beacon signal power levels, and repeating the further receiving and the further transmitting until the tester receives a DUT acknowledgment signal corresponding to one of the plurality of wireless tester beacon signals.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements

Abstract

A method for estimating receiver sensitivity of a radio frequency (RF) data packet signal transceiver device under test that relies upon beacon request and response data packets for enabling communication links.

IPC Classes  ?

• H04B 17/29 - Performance testing
• H04B 17/318 - Received signal strength
• H04W 24/08 - Testing using real traffic

Abstract

A method for assessing receiver signal reception performance during wireless beam steering operation of a radio frequency (RF) data packet signal transceiver capable of multiple input, multiple output (MIMO) operation. In response to transmissions of a sounding packet (SP) from a beamforming device (“beamformer”), a receiving device (“beamformee”) transmits a response data packet containing matrix data representing a beamforming feedback matrix (BFM) related to signal attenuation by the wireless signal path environment through which the beamformer and beamformee are communicating. Using the matrix data, a statistical variation can be computed which is indicative of signal reception performance of the beamformee.

IPC Classes  ?

• H04B 7/04 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
• H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
• H04B 17/00 - MonitoringTesting
• H04B 17/24 - MonitoringTesting of receivers with feedback of measurements to the transmitter
• H04B 7/0417 - Feedback systems
• H04B 7/0452 - Multi-user MIMO systems
• H04B 7/0456 - Selection of precoding matrices or codebooks, e.g. using matrices for antenna weighting

Abstract

A method for improving accuracy of power measurements of low power radio frequency (RF) signals received by a RF signal receiver in which power measurement accuracy taken at a low resolution is compensated with use of multiple RF signal attenuations at a finer resolution. In accordance with exemplary embodiments, incremental RF signal attenuations are applied to the received RF signal. An average of the power measurements, including those with the applied signal attenuations, has a net measurement error less than that of a direct power measurement.

IPC Classes  ?

• H04W 24/00 - Supervisory, monitoring or testing arrangements

Abstract

A method for enabling confirmation of expected phase shifts of radio frequency (RF) signals emitted from respective elements of an antenna array, such as a phased array antenna used for providing directional RF signal radiation patterns needed for beamforming. As a RF signal transmitted via an antenna element of the antenna array is shifted, e.g., stepped, in phase, the resulting received RF signal is monitored. Following detection of a phase shift, a sample of the received RF signal is captured and stored, e.g., for subsequent analysis, such as comparison with one or more expected signal phase differences to characterize the directivity of the transmitted signal.

IPC Classes  ?

• H04B 17/10 - MonitoringTesting of transmitters
• G01R 29/10 - Radiation diagrams of antennas

Abstract

A testing apparatus obtains user equipment (UE) parametric measurements with unknown and/or unavailable authentication and security information. The testing apparatus may obtain uplink and downlink parameters of a wireless device after the wireless device initiates registration while an associated timer is activated, enabling the testing apparatus to obtain additional measurement information without security information about the tested wireless device. The apparatus may also measure the UE's transmitted power level prior to the initiation of the authentication procedure. The testing apparatus may determine if a wireless device is to be tested at another frequency pair. If so, the testing apparatus redirects the wireless device to a radio resource at the other frequency pair. The testing apparatus then obtains uplink and downlink parameters for the wireless device by performing pre-registration and intra-registration measurements at the other frequency pair. The procedure is repeated until measurements for all desired frequency pairs are completed.

IPC Classes  ?

• H04B 17/15 - Performance testing
• H04B 17/10 - MonitoringTesting of transmitters

Abstract

A method for communicating test results from a wireless device under test (DUT) using non-link testing resources. Test data resulting from testing one or more operations of the DUT are combined with other data to form one or more data packets for transmission to a tester. The test data occupies, e.g., via encoding, a portion of the one or more data packets designated for data identifying the DUT or a tester.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements

Abstract

A method for enabling confirmation of expected phase shifts of radio frequency (RF) signals emitted from respective elements of an antenna array, such as a phased array antenna used for providing directional RF signal radiation patterns needed for beamforming. As a RF signal transmitted via an antenna element of the antenna array is shifted, e.g., stepped, in phase, the resulting received RF signal is monitored. Following detection of a phase shift, a sample of the received RF signal is captured and stored, e.g., for subsequent analysis, such as comparison with one or more expected signal phase differences to characterize the directivity of the transmitted signal.

IPC Classes  ?

• H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
• H04B 17/12 - MonitoringTesting of transmitters for calibration of transmit antennas, e.g. of amplitude or phase

Abstract

Method for establishing a mobile terminated call between a Global System for Mobile Communications (GSM) test system and a GSM mobile transceiver device under test (DUT) with reduced signaling via a call control (CC) sublayer of layer 3.

IPC Classes  ?

• H04W 24/08 - Testing using real traffic
• H04W 12/06 - Authentication
• H04W 68/00 - User notification, e.g. alerting or paging, for incoming communication, change of service or the like

Abstract

Method for testing implicit beamforming operation of a radio frequency (RF) data packet signal transceiver device under test (DUT), including transmitting to the DUT combinations of a multidirectional (e.g., legacy) RF test signal and at least two unidirectional (e.g., beamformed) RF test signals with different signal directivity patterns, and monitoring signal strengths of signals received from the DUT in response to each signal. Signal directivity patterns can be controlled by transmitting multiple phase-controlled RF signals via separate arrays of multiple antenna elements to the DUT within a multipath RF signal environment, such as an electromagnetically shielded enclosure.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• H04B 17/15 - Performance testing
• H04B 17/20 - MonitoringTesting of receivers

Abstract

Method for testing implicit beamforming operation of a radio frequency (RF) data packet signal transceiver device under test (DUT), including transmitting to the DUT combinations of a multidirectional (e.g., legacy) RF test signal and at least two unidirectional (e.g., beamformed) RF test signals with different signal directivity patterns, and monitoring signal strengths of signals received from the DUT in response to each signal. Signal directivity patterns can be controlled by transmitting multiple phase-controlled RF signals via separate arrays of multiple antenna elements to the DUT within a multipath RF signal environment, such as an electromagnetically shielded enclosure.

IPC Classes  ?

• H04B 17/29 - Performance testing
• H04B 17/15 - Performance testing
• H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station

Abstract

Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) with multiple RF signal transmitters and RF signal receivers capable of concurrent operations. Multiple successions of test data packets from a tester to respective RF signal receivers of the DUT and multiple successions of responsive DUT data packets from respective RF signal transmitters of the DUT to the tester are conveyed such that multiple RF signal transmissions, multiple RF signal receptions, or RF signal transmission and reception are performed at least partially concurrently.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• H04B 17/24 - MonitoringTesting of receivers with feedback of measurements to the transmitter

Abstract

Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) with multiple RF signal transmitters and RF signal receivers capable of concurrent operations. Multiple successions of test data packets from a tester to respective RF signal receivers of the DUT and multiple successions of responsive DUT data packets from respective RF signal transmitters of the DUT to the tester are conveyed such that multiple RF signal transmissions, multiple RF signal receptions, or RF signal transmission and reception are performed at least partially concurrently.

IPC Classes  ?

• H04B 17/29 - Performance testing
• H04L 12/26 - Monitoring arrangements; Testing arrangements
• H04B 17/00 - MonitoringTesting

Abstract

Method for establishing a mobile terminated call between a Global System for Mobile Communications (GSM) test system and a GSM mobile transceiver device under test (DUT) with reduced signaling via a call control (CC) sublayer of layer 3.

IPC Classes  ?

• H04W 24/08 - Testing using real traffic
• H04W 68/00 - User notification, e.g. alerting or paging, for incoming communication, change of service or the like
• H04W 12/06 - Authentication

Abstract

Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) including communicating via each one of multiple available signal channels. Data packets exchanged between a tester and DUT as a normal part of a communication link initiation sequence are exchanged in such a manner that the tester transmits via all available channels simultaneously, thereby ensuring that a properly working DUT will always transmit in response. For example, in the case of a Bluetooth low energy transceiver, advertisement, scan request and scan response data packets can be used in such manner.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements
• H04W 24/08 - Testing using real traffic

Abstract

Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) including communicating via each one of multiple available signal channels. Data packets exchanged between a tester and DUT as a normal part of a communication link initiation sequence are exchanged in such a manner that the tester transmits with varied signal power via all available channels simultaneously, thereby ensuring that a properly working DUT will transmit in response to reception of tester data packets having sufficient signal power. For example, in the case of a Bluetooth low energy transceiver, advertisement, scan request and scan response data packets can be used in such manner.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• H04B 17/10 - MonitoringTesting of transmitters

Abstract

Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) including communicating via at least one of multiple available signal channels. Data packets exchanged between a tester and DUT as a normal part of a communication link initiation sequence are selectively exchanged and suppressed to enable testing of the DUT without requiring inclusion of special drivers within the DUT, special test software within the tester or establishment of a synchronized communication link between the tester and DUT. For example, in the case of a Bluetooth low energy transceiver, advertisement, scan request and scan response data packets can be used in such manner.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• H04B 17/24 - MonitoringTesting of receivers with feedback of measurements to the transmitter

Abstract

Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) including communicating via at least one of multiple available signal channels. Data packets exchanged between a tester and DUT as a normal part of a communication link initiation sequence are selectively exchanged and suppressed to enable testing of the DUT without requiring inclusion of special drivers within the DUT, special test software within the tester or establishment of a synchronized communication link between the tester and DUT. For example, in the case of a Bluetooth low energy transceiver, advertisement, scan request and scan response data packets can be used in such manner.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• H04W 24/06 - Testing using simulated traffic
• H04B 17/17 - Detection of non-compliance or faulty performance, e.g. response deviations
• H04B 17/14 - MonitoringTesting of transmitters for calibration of the whole transmission and reception path, e.g. self-test loop-back

Abstract

Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) including communicating via each one of multiple available signal channels. Data packets exchanged between a tester and DUT as a normal part of a communication link initiation sequence are exchanged in such a manner that the tester transmits with varied signal power via all available channels simultaneously, thereby ensuring that a properly working DUT will transmit in response to reception of tester data packets having sufficient signal power. For example, in the case of a Bluetooth low energy transceiver, advertisement, scan request and scan response data packets can be used in such manner.

IPC Classes  ?

• H04W 24/06 - Testing using simulated traffic
• H04B 17/17 - Detection of non-compliance or faulty performance, e.g. response deviations
• H04B 17/00 - MonitoringTesting
• H04W 52/24 - TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters

Abstract

Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) including communicating via each one of multiple available signal channels. Data packets exchanged between a tester and DUT as a normal part of a communication link initiation sequence are exchanged in such a manner that the tester transmits via all available channels simultaneously, thereby ensuring that a properly working DUT will always transmit in response. For example, in the case of a Bluetooth low energy transceiver, advertisement, scan request and scan response data packets can be used in such manner.

IPC Classes  ?

• H04B 17/17 - Detection of non-compliance or faulty performance, e.g. response deviations
• H04B 17/00 - MonitoringTesting

Abstract

Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) including detecting transitions between RF data packet signal transmission and reception by the DUT, detecting transitions between different RF data packet signal transmission operations by the DUT, and detecting transitions between different RF data packet signal reception operations by the DUT.

IPC Classes  ?

• H04B 17/15 - Performance testing
• H04B 17/29 - Performance testing
• H04L 1/20 - Arrangements for detecting or preventing errors in the information received using signal-quality detector

Abstract

Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) in which test data packets with varying power levels are transmitted to the DUT for testing the DUT while still ensuring that the DUT remains in receive (RX) mode and is prevented from searching for another data packet signal. Alternatively, in the event that the DUT becomes unresponsive due to searching for another data packet signal, multiple test data packets with sufficient signal power levels to ensure reception by the DUT are transmitted to the DUT to cause the DUT to cease searching for another data packet signal and return to RX mode.

IPC Classes  ?

• H04B 17/29 - Performance testing
• H04B 17/15 - Performance testing

Abstract

Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) in which test data packets with varying power levels are transmitted to the DUT for testing the DUT while still ensuring that the DUT remains in receive (RX) mode and is prevented from searching for another data packet signal. Alternatively, in the event that the DUT becomes unresponsive due to searching for another data packet signal, multiple test data packets with sufficient signal power levels to ensure reception by the DUT are transmitted to the DUT to cause the DUT to cease searching for another data packet signal and return to RX mode.

IPC Classes  ?

• H04L 1/20 - Arrangements for detecting or preventing errors in the information received using signal-quality detector
• H04L 1/24 - Testing correct operation
• H04W 24/06 - Testing using simulated traffic

Abstract

Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) including detecting transitions between RF data packet signal transmission and reception by the DUT, detecting transitions between different RF data packet signal transmission operations by the DUT, and detecting transitions between different RF data packet signal reception operations by the DUT.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements
• H04L 1/20 - Arrangements for detecting or preventing errors in the information received using signal-quality detector
• H04L 7/00 - Arrangements for synchronising receiver with transmitter

Abstract

Method for testing one or more of a group of radio frequency (RF) data packet signal transceiver devices under test (DUTs) with reduced signal interference from the remaining DUTs. A tester broadcasts a signal containing power control instructions about uplink signal power characteristics for communication with the tester. For example, for the LTE 3GPP standards, such characteristics could include power ramping step size, preamble initial received target power or maximum number of preamble transmissions for uplink signals transmitted from the DUTs. Following initiation of communication between the tester and one or more DUTs, the tester broadcasts a signal containing power control instructions to instruct the remaining DUTs to transmit any future signals with different uplink signal power characteristics. For the LTE 3GPP standards, such different characteristics could include reduced power ramping step size, reduced preamble initial received target power or reduced maximum number of preamble transmissions for uplink signals.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements
• H04B 17/318 - Received signal strength
• H04B 17/345 - Interference values

Abstract

Method for testing one or more of a group of radio frequency (RF) data packet signal transceiver devices under test (DUTs) with reduced signal interference from the remaining DUTs. A tester broadcasts a signal containing power control instructions about uplink signal power characteristics for communication with the tester. For example, for the LTE 3GPP standards, such characteristics could include power ramping step size, preamble initial received target power or maximum number of preamble transmissions for uplink signals transmitted from the DUTs. Following initiation of communication between the tester and one or more DUTs, the tester broadcasts a signal containing power control instructions to instruct the remaining DUTs to transmit any future signals with different uplink signal power characteristics. For the LTE 3GPP standards, such different characteristics could include reduced power ramping step size, reduced preamble initial received target power or reduced maximum number of preamble transmissions for uplink signals.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements
• H04L 29/06 - Communication control; Communication processing characterised by a protocol
• H04W 52/14 - Separate analysis of uplink or downlink

Abstract

A method for wireless communications testing using downlink (DL) signal transmissions from an access point to a mobile terminal and uplink (UL) signal transmissions from said mobile terminal to said access point. Accurate block error rate (BLER) testing of LTE mobile devices in a wireless signal environment is enabled by preventing repeated transmissions of the same downlink (DL) data block that would normally follow reception of uplink (UL) transmissions of negative UL acknowledgments (NACKs) caused by failures to decode prior DL data transmissions, thereby producing cumulative NACK counts accurately reflecting data reception errors.

IPC Classes  ?

• H04L 1/20 - Arrangements for detecting or preventing errors in the information received using signal-quality detector
• H04L 1/18 - Automatic repetition systems, e.g. Van Duuren systems
• H04L 1/16 - Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
• H04W 24/06 - Testing using simulated traffic

Abstract

Method for calibrating an over-the air (OTA) test system for testing multiple radio frequency (RF) data packet signal transceiver devices under test (DUTs), as well as using such a calibrated OTA test system for performing such tests. Calibration is achieved by placing a known good device (KGD) in multiple defined locations within the OTA test system, radiating the KGD with RF test signals at each location, and collecting from the KGD at each location channel quality information identifying optimal RF test signal sub-band channels for ensuring reliable communications within the test system. Use of such system includes placing multiple DUTs at the defined locations within the OTA test system and communicating with them wirelessly via the identified optimal RF test signal sub-band channels.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements
• H04L 1/20 - Arrangements for detecting or preventing errors in the information received using signal-quality detector

Abstract

A method for wireless communications testing using downlink (DL) signal transmissions from an access point to a mobile terminal and uplink (UL) signal transmissions from said mobile terminal to said access point. Accurate block error rate (BLER) testing of LTE mobile devices in a wireless signal environment is enabled by preventing repeated transmissions of the same downlink (DL) data block that would normally follow reception of uplink (UL) transmissions of negative UL acknowledgments (NACKs) caused by failures to decode prior DL data transmissions, thereby producing cumulative NACK counts accurately reflecting data reception errors.

IPC Classes  ?

• H04L 1/20 - Arrangements for detecting or preventing errors in the information received using signal-quality detector
• H04L 1/16 - Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals

Abstract

Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) via a wireless signal medium that enables final functional testing of a fully assembled DUT without requiring wired signal connections. System performance characteristics indicative of manufacturing assembly defects, such as defective antennas or subsystem connections, can be performed using over the air (OTA) test signals communicated wirelessly between the DUT and a tester. By using actual DUT performance characteristics determined during earlier manufacturing tests, such as receiver sensitivity and transmitter power, and known power levels available from the tester transmitter, the OTA signal path loss (i.e., attenuation of the wireless signal) can be estimated and used to confirm the final state of system operation.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements
• H04L 1/20 - Arrangements for detecting or preventing errors in the information received using signal-quality detector

Abstract

Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) via a wireless signal medium that enables final functional testing of a fully assembled DUT without requiring wired signal connections. System performance characteristics indicative of manufacturing assembly defects, such as defective antennas or subsystem connections, can be performed using over the air (OTA) test signals communicated wirelessly between the DUT and a tester. By using actual DUT performance characteristics determined during earlier manufacturing tests, such as receiver sensitivity and transmitter power, and known power levels available from the tester transmitter, the OTA signal path loss (i.e., attenuation of the wireless signal) can be estimated and used to confirm the final state of system operation.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements
• H04L 1/20 - Arrangements for detecting or preventing errors in the information received using signal-quality detector
• H04W 24/00 - Supervisory, monitoring or testing arrangements

Abstract

System and method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) to enable use of measured packet error rate (PER) to determine transmit signal quality and thereby estimate error vector magnitude (EVM) of the DUT. By using a reference RF data packet signal transceiver having device characteristics and capabilities similar to the DUT including a low noise figure, in place of a formal test instrument with a significantly higher noise figure, significantly lower power DUT transmit signals can be tested, since the additional SNR is not required to determine transmit signal quality, thereby enabling reliable testing of transmit signal quality of the lower power signals from the DUTs. With a calibrated reference RF data packet signal receiver, a reduction in sensitivity as compared to the calibrated sensitivity indicates a reduced transmit signal casuality of the received packet.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements
• H04L 1/20 - Arrangements for detecting or preventing errors in the information received using signal-quality detector

Abstract

System and method for capturing and enabling analysis of one or more test data packets from a radio frequency (RF) data packet signal transmitter device under test (DUT). Recently captured data packets from a received RF data packet signal are retained for analysis following confirmation that they contain potentially valid test data packets. Such confirmation is achieved by confirming that a data pattern defined by currently captured data packets differs from a data pattern defined by subsequently received data packets. Following such confirmation, a trigger signal initiates access and/or analysis of the captured data packets.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements

Abstract

System and method for capturing and enabling analysis of one or more test data packets from a radio frequency (RF) data packet signal transmitter device under test (DUT). Recently captured data packets from a received RF data packet signal are retained for analysis following confirmation that they contain potentially valid test data packets. Such confirmation is achieved by confirming that a data pattern defined by currently captured data packets differs from a data pattern defined by subsequently received data packets. Following such confirmation, a trigger signal initiates access and/or analysis of the captured data packets.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements

Abstract

Method for testing implicit beamforming performance of a multiple-input multiple-output (MIMO) radio frequency (RF) data packet signal transceiver device under test (DUT). The data packet signals forming the sequential data packet signal transmissions used for beamforming are produced with a selectively varied phase difference and conveyed via internal RF signal paths to external transmit terminals. Combining these transmitted data packet signals produces a combined data packet signal in which a peak power occurs during which a particular phase difference is being induced between the sequential DUT data packet signal transmissions used for the beamforming. This phase difference corresponds to the difference in RF signal phase lengths between the internal RF signal paths of the DUT, and is thereby indicative of the amount of phase shift needed between the sequential DUT data packet signal transmissions used for the beamforming to enable optimal implicit beamforming performance.

IPC Classes  ?

• H04B 17/15 - Performance testing
• H04B 7/04 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas

Abstract

A method for processing a time-domain signal with transient oscillations includes: performing, by one or more computer systems, a time-frequency representation transform on the time-domain signal to obtain a plurality of coefficients for, with a coefficient corresponding to a presence of an impulse response of a filter used by the time-frequency representation transform; selecting one or more of the coefficients, with the selected one or more of the coefficients having attributes that are more indicative of the transient oscillations; and reconstructing, based on performing an inverse transform on the selected one or more coefficients, a portion of the time-domain signal that represents the transient oscillations.

IPC Classes  ?

• H04R 3/04 - Circuits for transducers for correcting frequency response

Abstract

Method and system for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) by monitoring RF data packet signals between a tester and a DUT at a low network media layer, such as the physical (PHY) layer in accordance with the Open Systems Interconnection (OSI) reference model stack. By testing at a low layer, fewer signal conversions and data packet operations are required to perform various basic DUT tests, such as data packet throughput, DUT signal transmission performance, DUT packet type detection without packet decoding, validation of rate adaptation algorithms, and bit error rate (BER) testing.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements

Abstract

Methods for testing multiple data packet signal transceiver devices under test (DUTs) with a shared tester. The DUTs transmit their data packet signals until predetermined numbers of data packets have been transmitted or predetermined time intervals expire, following which, each DUT awaits a synchronization request to begin transmitting data packets to the tester. Alternatively, the tester determines when its receiver is available for receiving data packets, following which, synchronization requests are sent to respective DUTs to initiate their transmissions of data packets to the tester. Further alternatively, power levels among data packets initially transmitted from the DUTs are monitored to determine when they are indicative of them having settled. As each DUT data packet signal power settles, a status signal indicating the settled nature of each DUT is provided to the tester which then begins receiving the respective DUT data packet signals, as they settle in power, for analysis.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements

Abstract

Methods for testing multiple data packet signal transceiver devices under test (DUTs) with a shared tester. The DUTs transmit their data packet signals until predetermined numbers of data packets have been transmitted or predetermined time intervals expire, following which, each DUT awaits a synchronization request to begin transmitting data packets to the tester. Alternatively, the tester determines when its receiver is available for receiving data packets, following which, synchronization requests are sent to respective DUTs to initiate their transmissions of data packets to the tester. Further alternatively, power levels among data packets initially transmitted from the DUTs are monitored to determine when they are indicative of them having settled. As each DUT data packet signal power settles, a status signal indicating the settled nature of each DUT is provided to the tester which then begins receiving the respective DUT data packet signals, as they settle in power, for analysis.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting

Abstract

An apparatus and method of operating automated test equipment (ATE) in a networked environment of multiple external test controllers. The system resources responsible for coordinating the shared uses of the ATE by the multiple external test controllers are centralized within the ATE. As a result, programming of the respective test controllers is simplified since the test controllers no longer need be responsible for communicating among themselves to coordinate or otherwise determine how and when access to the ATE is granted to any particular test controller.

IPC Classes  ?

• G01R 31/14 - Circuits therefor
• H04L 12/26 - Monitoring arrangements; Testing arrangements
• G01R 31/3183 - Generation of test inputs, e.g. test vectors, patterns or sequences

Abstract

Circuitry for shifting a phase of a radio frequency (RF) signal. Mutually dissimilar and electrically coupled portions of an electromagnetic transmission line pattern on one side of a substrate interact with another electromagnetic transmission line pattern on the opposing substrate side to convey a RF signal with a phase shift that is determined by the RF signal frequency and respective dimensions of the electromagnetic transmission line patterns and is substantially constant over a wide bandwidth. With multiple implementations of such opposing electromagnetic transmission line patterns having different pattern dimensions and coupled between RF signal switches, multiple phase shifts can be selectively provided.

IPC Classes  ?

• H01P 1/18 - Phase-shifters
• H01P 9/00 - Delay lines of the waveguide type
• H01P 1/10 - Auxiliary devices for switching or interrupting
• H01P 5/02 - Coupling devices of the waveguide type with invariable factor of coupling

Abstract

Circuitry for shifting a phase of a radio frequency (RF) signal. Mutually dissimilar and electrically coupled portions of an electromagnetic transmission line pattern on one side of a substrate interact with another electromagnetic transmission line pattern on the opposing substrate side to convey a RF signal with a phase shift that is determined by the RF signal frequency and respective dimensions of the electromagnetic transmission line patterns and is substantially constant over a wide bandwidth. With multiple implementations of such opposing electromagnetic transmission line patterns having different pattern dimensions and coupled between RF signal switches, multiple phase shifts can be selectively provided.

IPC Classes  ?

• H01P 1/18 - Phase-shifters

Abstract

System and method for controlling test flow of a radio frequency (RF) signal transceiver device under test (DUT) by inducing an interrupt via an internal signal interface or an external signal interface (with one example of the latter being a baseband signal interface for conveying audio signals). With exemplary embodiments, one or more DUT control signals are provided to or otherwise initiated within the DUT by inducing an interrupt, including inducement via use of the signal interface. With further exemplary embodiments, one or more test control signals are also provided to RF circuitry that responds by transmitting one or more RF receive signals for the DUT and receives from the DUT one or more RF transmit signals related to the one or more DUT control signals.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements

Abstract

A system and method for enabling automated testing of wireless data packet signal transceiver devices under test (DUTs). One or more DUTs are enclosed inside respective chambers within a shielded enclosure providing electromagnetic shielding for its interior region. Each DUT is powered by an internal power source and its radio frequency (RF) signal port is connected to an external RF signal interface at an outer wall of the shielded enclosure. An anchor at an outer wall of the shielded enclosure enables mechanical engagement with and physical displacement of the shielded enclosure, thereby allowing DUTs to be manipulated using pick and place automation devices for engagement with and connection to automated test equipment. Such test equipment can be assembled into vertically stacked RF signal test stations with which shielded DUT enclosures are engaged by physically mating their respective power and RF signal ports using the pick and place automation device.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements

Abstract

System and method for controlling test flow of a radio frequency (RF) signal transceiver device under test (DUT) by inducing an interrupt via an internal signal interface or an external signal interface (with one example of the latter being a baseband signal interface for conveying audio signals). With exemplary embodiments, one or more DUT control signals are provided to or otherwise initiated within the DUT by inducing an interrupt, including inducement via use of the signal interface. With further exemplary embodiments, one or more test control signals are also provided to RF circuitry that responds by transmitting one or more RF receive signals for the DUT and receives from the DUT one or more RF transmit signals related to the one or more DUT control signals.

IPC Classes  ?

• H04B 17/24 - MonitoringTesting of receivers with feedback of measurements to the transmitter
• H04B 17/00 - MonitoringTesting

Abstract

Method for testing multiple signal transceiver devices under test (DUTs), such as data packet signal transceivers, with a shared DUT testing resource, such as a tester having a single vector signal generator (VSG) and a single vector signal analyzer (VSA). Requests by the DUTs for access to tester resources (e.g., to receive signals from the signal generator or provide signals to the signal analyzer) are prioritized based upon tester availability and whether the requesting DUT requires sole access or can share access to the tester. If the tester is unavailable, DUT requests are queued according to their respective priorities to await tester availability. As a result, access to shared tester resources can be managed dynamically to minimize test time while testing multiple DUTs concurrently.

IPC Classes  ?

• H04B 17/15 - Performance testing
• H04B 17/11 - MonitoringTesting of transmitters for calibration

Abstract

Method for testing multiple signal transceiver devices under test (DUTs), such as data packet signal transceivers, with a shared DUT testing resource, such as a tester having a single vector signal generator (VSG) and a single vector signal analyzer (VSA). Requests by the DUTs for access to tester resources (e.g., to receive signals from the signal generator or provide signals to the signal analyzer) are prioritized based upon tester availability and whether the requesting DUT requires sole access or can share access to the tester. If the tester is unavailable, DUT requests are queued according to their respective priorities to await tester availability. As a result, access to shared tester resources can be managed dynamically to minimize test time while testing multiple DUTs concurrently.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting

Abstract

System and method for using a shared packet data signal source to test multiple packet data signal transceiver devices under test (DUTs) capable of communicating using multiple radio access technologies (RATs). The signal source provides a packet data signal that includes a plurality of sequential signal segments having respective signal timing parameters and mutually distinct signal characteristics in accordance with the RATs. Based upon the signal timing parameters, at least a portion of each signal segment is routed to a respective one of multiple signal connections for conveyance to a corresponding DUT.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements

Abstract

A system and method for testing a wireless data packet signal transceiver device under test (DUT) by using DUT control circuitry separate from a tester to access and execute test program instructions for controlling the DUT during testing with the tester. The test program instructions can be provided previously and stored for subsequent access and execution under control of the tester or an external control source, such a personal computer. Alternatively, the test program instructions can be provided by the tester or external control source immediately prior to testing, such as when beginning testing of a DUT with new or different performance characteristics or requirements. Accordingly, specialized testing of different DUTs while accounting for differences among various chipsets employed by the DUTs can be performed in coordination with a standard tester configuration without need for reconfiguring or reprogramming of the tester.

IPC Classes  ?

• G01R 31/28 - Testing of electronic circuits, e.g. by signal tracer
• G01R 31/3177 - Testing of logic operation, e.g. by logic analysers
• H04B 10/00 - Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
• G01M 11/00 - Testing of optical apparatusTesting structures by optical methods not otherwise provided for
• H04B 10/073 - Arrangements for monitoring or testing transmission systemsArrangements for fault measurement of transmission systems using an out-of-service signal

Abstract

A system and method for testing a wireless data packet signal transceiver device under test (DUT) by using DUT control circuitry separate from a tester to access and execute test program instructions for controlling the DUT during testing with the tester. The test program instructions can be provided previously and stored for subsequent access and execution under control of the tester or an external control source, such a personal computer. Alternatively, the test program instructions can be provided by the tester or external control source immediately prior to testing, such as when beginning testing of a DUT with new or different performance characteristics or requirements. Accordingly, specialized testing of different DUTs while accounting for differences among various chipsets employed by the DUTs can be performed in coordination with a standard tester configuration without need for reconfiguring or reprogramming of the tester.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements

Abstract

System and method for using a shared packet data signal source to test multiple packet data signal transceiver devices under test (DUTs) capable of communicating using multiple radio access technologies (RATs). The signal source provides a packet data signal that includes a plurality of sequential signal segments having respective signal timing parameters and mutually distinct signal characteristics in accordance with the RATs. Based upon the signal timing parameters, at least a portion of each signal segment is routed to a respective one of multiple signal connections for conveyance to a corresponding DUT.

IPC Classes  ?

• H04W 4/00 - Services specially adapted for wireless communication networksFacilities therefor
• H04W 24/08 - Testing using real traffic
• H04L 12/721 - Routing procedures, e.g. shortest path routing, source routing, link state routing or distance vector routing
• H04L 29/06 - Communication control; Communication processing characterised by a protocol
• H04B 17/00 - MonitoringTesting

Abstract

A system and method for testing multiple wireless data packet signal transceiver devices under test (DUTs) with dynamic signal interference compensation. Transmit data packets originating from other DUTs are monitored during receive signal testing of a selected DUT for concurrent occurrences of transmit and receive data packets. From this, it can be determined whether a failure to receive a responsive data packet, such as an acknowledgement, from the selected DUT is likely due to interference from a transmit data packet from another DUT being at least substantially concurrent with the receive data packet to which the selected DUT was expected to respond. If so, one or more receive data packets can be added to the receive signal sequence to extend the test and determine an accurate packet error rate (PER) without requiring a repeat of the full test.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• H04B 3/46 - MonitoringTesting
• H04L 12/26 - Monitoring arrangements; Testing arrangements
• H04W 24/08 - Testing using real traffic
• H04B 17/29 - Performance testing

Abstract

A system and method for enabling testing a data link of a data packet signal transceiver device under test (DUT). A RX data packet signal originating from a reference device is conveyed for reception by a DUT, and a TX data packet signal originating from the DUT is conveyed for reception by the reference device. At least a portion of the RX data packet signal is conveyed with a signal attenuation and at least a portion of the TX data packet signal is conveyed with a different signal attenuation.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements

Abstract

A system and method for testing multiple wireless data packet signal transceiver devices under test (DUTs) with dynamic signal interference compensation. Transmit data packets originating from other DUTs are monitored during receive signal testing of a selected DUT for concurrent occurrences of transmit and receive data packets. From this, it can be determined whether a failure to receive a responsive data packet, such as an acknowledgement, from the selected DUT is likely due to interference from a transmit data packet from another DUT being at least substantially concurrent with the receive data packet to which the selected DUT was expected to respond. If so, one or more receive data packets can be added to the receive signal sequence to extend the test and determine an accurate packet error rate (PER) without requiring a repeat of the full test.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting

Abstract

A system and method for testing one or more wireless data packet signal transceiver devices under test (DUTs). Incoming data packets from a DUT are monitored to discern between data packets transmitted as part of a DUT calibration cycle or initial data packets being transmitted as the DUT transmitter circuitry settles at its new settings (e.g., transmit signal frequency or power), and later data packets transmitted following completion of the DUT calibration cycle or settling of the DUT transmitter circuitry. Following identification of these later data packets, the tester is so notified and begins the test procedure, e.g., capturing the data packets for analysis. Meanwhile, the tester has been allowed to remain in active use for other test purposes during DUT calibration cycles and settling intervals, thereby increasing testing efficiency and reducing overall test time.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements

Abstract

System and method for confirming radio frequency (RF) signal connections with multiple devices under test (DUTs) tested concurrently using replicas of a RF test signal. Cabled signal connections between the signal source and the DUTs are monitored by sensing levels of outgoing and related reflection RF signals. These signal levels are compared against similar signal levels when the outgoing RF signals are provided to reference impedances. Alternatively, the cabled signal connections have lengths of known signal wavelengths and the RF test signal frequency is swept such that minimum and maximum time delays between the outgoing and reflection RF signals go through minimum and maximum signal cycles with a difference of at least one full cycle. The reflection RF signal magnitude and phase are monitored, from which peak and valley signal level differences and phase changes are identified to determine return loss and phase changes indicative of DUT connection.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• G01R 27/00 - Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
• G01R 23/00 - Arrangements for measuring frequenciesArrangements for analysing frequency spectra
• H04W 24/08 - Testing using real traffic
• H04B 17/17 - Detection of non-compliance or faulty performance, e.g. response deviations
• H01Q 3/26 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture
• H04B 3/462 - Testing group delay or phase shift, e.g. timing jitter

Abstract

System and method for using multiple data packet signal testers having narrower data packet signal bandwidths for testing multiple data packet signal transmitters having wider data packet signal bandwidths. Using multiple data packet signal testers with narrower receiver bandwidths to process respective portions of the wider bandwidth of the data packet signals produced by the devices under test (DUTs) enables use of lower cost, narrower-bandwidth test equipment to test wide-bandwidth signals.

IPC Classes  ?

• H04L 12/26 - Monitoring arrangements; Testing arrangements
• G06F 11/273 - Tester hardware, i.e. output processing circuits
• H04L 12/70 - Packet switching systems

Abstract

System and method for using multiple data packet signal testers having narrower data packet signal bandwidths for testing multiple data packet signal transmitters having wider data packet signal bandwidths. Using multiple data packet signal testers with narrower receiver bandwidths to process respective portions of the wider bandwidth of the data packet signals produced by the devices under test (DUTs) enables use of lower cost, narrower-bandwidth test equipment to test wide-bandwidth signals.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• H04W 24/06 - Testing using simulated traffic
• H04L 12/26 - Monitoring arrangements; Testing arrangements

Abstract

A method of using tester data packet signals and control instructions for testing multiple data packet signal transceiver devices under test (DUTs). During mutually alternating time intervals, selected ones of which are substantially contemporaneous, multiple tester data packet signals and DUT control instructions are used for concurrent testing of multiple DUTs.

IPC Classes  ?

• G01R 31/28 - Testing of electronic circuits, e.g. by signal tracer
• H04L 12/26 - Monitoring arrangements; Testing arrangements
• H04W 24/00 - Supervisory, monitoring or testing arrangements

Abstract

A method of using tester data packet signals and control instructions for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) capable of communicating using multiple radio access technologies (RATs) having one or more mutually distinct signal characteristics. During mutually alternating time intervals, selected ones of which are substantially contemporaneous, tester data packet signals and control instructions are used for concurrent testing and configuration for testing, respectively, of multiple RATs of the DUT.

IPC Classes  ?

• H04W 24/00 - Supervisory, monitoring or testing arrangements

Abstract

A system and method for using a NxN multiple input, multiple output (MIMO) data packet signal transceiver for testing multiple data packet signal transceivers. In accordance with one exemplary embodiment, a NxN MIMO access point can be used for simultaneous testing of multiple single input, single output (SISO) data packet signal transceivers. Selective data packet signal corruption (e.g., in the form of data packet signal attenuation), allows for individual testing of the transmit signals from respective ones of the data packet signal transceivers.

IPC Classes  ?

• H04B 17/00 - MonitoringTesting
• H04B 7/04 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas

Abstract

A method of using tester data packet signals and control instructions for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) capable of communicating using multiple radio access technologies (RATs) having one or more mutually distinct signal characteristics. During mutually alternating time intervals, selected ones of which are substantially contemporaneous, tester data packet signals and control instructions are used for concurrent testing and configuration for testing, respectively, of multiple RATs of the DUT.

IPC Classes  ?

• G01R 31/28 - Testing of electronic circuits, e.g. by signal tracer
• H04L 12/26 - Monitoring arrangements; Testing arrangements