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.
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.
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.
H04L 27/26 - Systèmes utilisant des codes à fréquences multiples
4.
System and method for using pulsed radio frequency (RF) signals and a modulated scattering probe (MSP) to enable measurements of distance to and planarity of a surface of a device under test (DUT)
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).
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.
System and Method for using a Single Radio Frequency (RF) Data Packet Signal Receiver to Perform Time-Switched Multiple Input, Multiple Output (MIMO) Data Packet Signal Analysis
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.
H04B 7/08 - Systèmes de diversité; Systèmes à plusieurs antennes, c. à d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station de réception
H04B 7/0456 - Sélection de matrices de pré-codage ou de livres de codes, p.ex. utilisant des matrices pour pondérer des antennes
7.
System and method for measuring path loss of a conductive radio frequency (RF) test signal path
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.
G01R 31/28 - Test de circuits électroniques, p.ex. à l'aide d'un traceur de signaux
8.
System and method for over-the-air (OTA) testing to detect faulty elements in an active array antenna of an extremely high frequency (EHF) wireless communication device
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.
G01R 27/28 - Mesure de l'atténuation, du gain, du déphasage ou des caractéristiques qui en dérivent dans des réseaux électriques quadripoles, c. à d. des réseaux à double entrée; Mesure d'une réponse transitoire
H01Q 3/26 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante
9.
System and method for testing a data packet signal transceiver
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.
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.
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.
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.
System and method for over-the-air (OTA) testing to detect faulty elements in an active array antenna of an extremely high frequency (EHF) wireless communication device
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.
H04B 17/391 - Modélisation du canal de propagation
H04B 17/17 - Détection de contre-performance ou d’exécution défectueuse, p.ex. déviations de réponse
H01Q 3/26 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante
14.
System and method for over-the-air (OTA) testing to detect faulty elements in an active array antenna of an extremely high frequency (EHF) wireless communication device
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.
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.
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.
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.
H04W 24/06 - Réalisation de tests en trafic simulé
18.
System and method for testing a device under test (DUT) capable of determining relative times of arrival or angles of arrival of multiple radio frequency signals
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.
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.
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.
H04B 7/04 - Systèmes de diversité; Systèmes à plusieurs antennes, c. à d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées
H04B 7/06 - Systèmes de diversité; Systèmes à plusieurs antennes, c. à d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
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.
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.
H04B 7/06 - Systèmes de diversité; Systèmes à plusieurs antennes, c. à d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
H04B 17/12 - Surveillance; Tests d’émetteurs pour l’étalonnage d’antennes d’émission, p.ex. de l’amplitude ou de la phase
23.
Method for testing a radio frequency (RF) data packet signal transceiver for proper implicit beamforming operation
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.
H04B 7/06 - Systèmes de diversité; Systèmes à plusieurs antennes, c. à d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées à la station d'émission
24.
Method for testing a radio frequency (RF) data packet signal transceiver with multiple transmitters and receivers capable of concurrent operations
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.
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.
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.
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.
H04W 52/24 - Commande de puissance d'émission [TPC Transmission power control] le TPC étant effectué selon des paramètres spécifiques utilisant le rapport signal sur parasite [SIR Signal to Interference Ratio] ou d'autres paramètres de trajet sans fil
28.
Method for testing a low power radio frequency (RF) data packet signal transceiver
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.
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.
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.
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.
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.
H04L 1/20 - Dispositions pour détecter ou empêcher les erreurs dans l'information reçue en utilisant un détecteur de la qualité du signal
H04L 1/18 - Systèmes de répétition automatique, p.ex. systèmes Van Duuren
H04L 1/16 - Dispositions pour détecter ou empêcher les erreurs dans l'information reçue en utilisant un canal de retour dans lesquelles le canal de retour transporte des signaux de contrôle, p.ex. répétition de signaux de demande
H04W 24/06 - Réalisation de tests en trafic simulé
33.
Method for testing a radio frequency (RF) data packet signal transceiver via a wireless signal path
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.
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.
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.
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.
H04L 12/26 - Dispositions de surveillance; Dispositions de test
G01R 31/3183 - Génération de signaux d'entrée de test, p.ex. vecteurs, formes ou séquences de test
37.
RF phase shift apparatus having an electrically coupled path separated from an electromagnetically coupled path to provide a substantially constant phase difference therebetween
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.
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.
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.
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.
G01R 31/28 - Test de circuits électroniques, p.ex. à l'aide d'un traceur de signaux
G01R 31/3177 - Tests de fonctionnement logique, p.ex. au moyen d'analyseurs logiques
H04B 10/00 - Systèmes de transmission utilisant des ondes électromagnétiques autres que les ondes hertziennes, p.ex. les infrarouges, la lumière visible ou ultraviolette, ou utilisant des radiations corpusculaires, p.ex. les communications quantiques
G01M 11/00 - Test des appareils optiques; Test des structures ou des ouvrages par des méthodes optiques, non prévu ailleurs
H04B 10/073 - Dispositions pour la surveillance ou le test de systèmes de transmission; Dispositions pour la mesure des défauts de systèmes de transmission utilisant un signal hors service
41.
System and method for concurrently testing multiple packet data signal transceivers capable of communicating via multiple radio access technologies
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.
H04L 12/721 - Procédures de routage, p.ex. routage par le chemin le plus court, routage par la source, routage à état de lien ou routage par vecteur de distance
H04L 29/06 - Commande de la communication; Traitement de la communication caractérisés par un protocole
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.
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.
H04B 17/17 - Détection de contre-performance ou d’exécution défectueuse, p.ex. déviations de réponse
H01Q 3/26 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante
H04B 3/462 - Tests de temps de propagation de groupe ou de déphasage, p.ex. instabilité de temporisation
44.
System and method for testing wide band data packet signal transceivers using narrow band testers
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.
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.
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.
A method for testing a data packet signal transceiver device under test (DUT) that minimizes time lost due to waiting for respective power levels of data packets transmitted by the DUT to settle at the desired nominal value for transmit signal testing. In accordance with exemplary embodiments, signals transmitted by the DUT during receive signal testing, e.g., as acknowledgement data packets, are transmitted at the nominal value for transmit signal testing, thereby allowing sufficient time for individual data packet signal power levels to settle and remain consistent at the nominal value by the time receive signal testing is completed and transmit signal testing is to begin.
A method for using a test data packet signal to test a data packet signal transceiver device under test (DUT) having an operating characteristic defined by a data packet error rate (PER) as a function of data packet signal power (PWR). The test data packet signal power is varied and a test PER is computed as a function of DUT response data packets and test data packets until a measured test PER or a computed test PER extrapolated from measured PERs is equal to a predetermined PER less than and greater than maximum and minimum PERs, respectively.
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.
H04B 17/17 - Détection de contre-performance ou d’exécution défectueuse, p.ex. déviations de réponse
H01Q 3/26 - Dispositifs pour changer ou faire varier l'orientation ou la forme du diagramme de directivité des ondes rayonnées par une antenne ou un système d'antenne faisant varier la distribution de l’énergie à travers une ouverture rayonnante
H04B 3/462 - Tests de temps de propagation de groupe ou de déphasage, p.ex. instabilité de temporisation
50.
System and method for confirming radio frequency (RF) signal connectivity with device under test (DUT)
A system and method for confirming radio frequency (RF) signal connectivity integrity with a device under test (DUT). An output RF signal is provided to a RF signal port and looped back for analysis along with an input RF signal, which includes a reflected signal component related to the output RF signal, from the RF signal port. By measuring magnitudes of combinations of the input and loopback RF signals, e.g., at multiple signal frequencies, it can be determined whether the RF signal port is properly terminated by the DUT.
A system and method for testing multiple data packet signal transceivers concurrently in which scalar and vector signal testing are separated. Concurrent testing of scalar signal characteristics of multiple data packet signals from the data packet signal transceivers can be performed while also performing testing of vector signal characteristics of portions of each of the multiple data packet signals, thereby requiring less test time for performing all desired signal tests.
A method of testing, such as for a bit error rate (BER), of multiple data packet signal transceivers during which a tester and the data packet signal transceivers exchange sequences of test data packets and summary data packets. The tester provides the test data packets which contain respective pluralities of data bits with respective predetermined bit patterns. Responsive thereto, the data packet signal transceivers provide the summary data packets which contain respective summary data indicative of the number of data bits with the respective predetermined bit patterns that are correctly received by corresponding ones of the data packet signal transceivers.
System and method for facilitating testing of multiple data packet signal transceivers involving data-packet-signal replication and one or more status signals indicating successful and unsuccessful receptions of confirmation signals. Based upon the one or more status signals, one or more control signals cause the replicated data packet signals to be distributed to the devices under test (DUTs) such that, following successful and unsuccessful receptions of confirmation signals, corresponding replicated data packet signals are caused to fail to conform in part or to conform, respectively, with a predetermined data packet signal standard.
Method and system for facilitating testing of multiple time-division-duplex (TDD) data packet signal transceivers. Replicas of a data packet signal are transmitted by a tester to multiple TDD devices under test (DUTs), where the replicated signal is either a null or TDD data packet signal. In one embodiment, replica null data packet signals are transmitted for a predetermined time interval sufficient for the DUTs to synchronize with the tester. In another embodiment, following successful and unsuccessful receptions of responsive signals from respective DUTs indicating successful reception of their respective replica TDD data packet signals and, therefore, synchronization with the tester, corresponding replica TDD data packet signals are provided with data packet signal characteristics causing such replica data packet signals to fail to conform or to conform, respectively, with a predetermined data packet signal standard. Following synchronization, test and responsive data packet signals can be exchanged between the tester and DUTs.
H04L 12/26 - Dispositions de surveillance; Dispositions de test
H04W 24/02 - Dispositions pour optimiser l'état de fonctionnement
H04W 74/00 - Accès au canal sans fil, p.ex. accès planifié, accès aléatoire
H04L 1/16 - Dispositions pour détecter ou empêcher les erreurs dans l'information reçue en utilisant un canal de retour dans lesquelles le canal de retour transporte des signaux de contrôle, p.ex. répétition de signaux de demande
H04L 1/18 - Systèmes de répétition automatique, p.ex. systèmes Van Duuren
55.
System and method for testing radio frequency device under test capable of communicating using multiple radio access technologies
System and method for testing a radio frequency (RF) device under test (DUT) communicating using multiple radio access technologies (RATs). Single data signal sequences having characteristics of multiple RATs as prescribed by signal standards are exchanged between a tester and DUT. The tester and DUT process received signal sequences substantially in parallel with their reception. A pattern of contemporaneous signal sequence reception and processing continues for as many RATs as the DUT is capable of supporting.
G01R 31/28 - Test de circuits électroniques, p.ex. à l'aide d'un traceur de signaux
H03M 13/00 - Codage, décodage ou conversion de code pour détecter ou corriger des erreurs; Hypothèses de base sur la théorie du codage; Limites de codage; Méthodes d'évaluation de la probabilité d'erreur; Modèles de canaux; Simulation ou test des codes
H04L 12/26 - Dispositions de surveillance; Dispositions de test
H04W 24/00 - Dispositions de supervision, de contrôle ou de test
H04W 24/06 - Réalisation de tests en trafic simulé
H04W 48/18 - Sélection d'un réseau ou d'un service de télécommunications
H04W 88/06 - Dispositifs terminaux adapté au fonctionnement dans des réseaux multiples, p.ex. terminaux multi-mode
H04L 12/28 - Réseaux de données à commutation caractérisés par la configuration des liaisons, p.ex. réseaux locaux [LAN Local Area Networks] ou réseaux étendus [WAN Wide Area Networks]
H04L 12/54 - Systèmes de commutation par mémorisation et restitution
56.
System and method for facilitating comparison of radio frequency (RF) data signals transmitted by a device under test (DUT) and received by a test system
A system and method for facilitating comparison of radio frequency (RF) data signals transmitted by a device under test (DUT) and received by a test system. A RF data signal received from a DUT is analyzed to provide analysis data indicative of conformance of the DUT operation with one or more applicable signal standards. The RF data signal is also converted to related conversion data that can be stored with state machine data corresponding to states of the signal testing subsystem. This state machine data can then be processed as needed with the analysis data and conversion data for off-line tasks such as debugging new test programs and procedures.
A system and method for the execution of a program comprises a user-defined sequence of standard hardware and analysis module commands of an instrument, in the context of a tester comprising a plurality of VSAs and VSGs, or other hardware measurement modules types, where the coordination of command execution and resource availability is built into the system as an inherent part of its overall architecture. As such, the commands are the same as those ordinarily executed in piecemeal fashion, but are now automatically and sequentially executed in an atomic and deterministic manner through the coordinated interaction of embodiments of the invention.
A system and method for the execution of a program comprises a user-defined sequence of standard hardware and analysis module commands of an instrument, in the context of a tester comprising a plurality of VSAs and VSGs, or other hardware measurement modules types, where the coordination of command execution and resource availability is built into the system as an inherent part of its overall architecture. As such, the commands are the same as those ordinarily executed in piecemeal fashion, but are now automatically and sequentially executed in an atomic and deterministic manner through the coordinated interaction of embodiments of the invention.
A system and method for testing multiple-input-multiple-output (MIMO) devices under test (DUTs) with multiple radio frequency (RF) signal testers. Each tester receives one or more RF signals from one or more of the DUTs, and the testers are mutually coupled in a ring such that successive ones receive a trigger input signal from an upstream tester and provide a trigger output signal to a downstream tester. Each tester is responsive to its input trigger signal and its one or more RF signals by providing its output trigger signal such that its output trigger signal has an asserted state initiated in response to an assertion of its input trigger signal and a transcending of a predetermined magnitude by at least one of the one or more RF signals.
A system and method for initiating testing of a plurality of communication devices. The tester and devices under test (DUTs) are first synchronized as a way of confirming test readiness on the part of the DUTs, Following that, a test sequence is initiated by the tester. The synchronization and test initiation can be accomplished using signals with differing signal magnitudes or device identifiers. The test sequence can be a DUT transmit signal test in which each DUT transmits data packets in accordance with one or more predefined test sequences. Alternatively, the test sequence can be a DUT receive signal test in which the tester transmits data packets to the DUTs with differing signal frequencies or signal magnitudes.
A local oscillator (LO) of a test system is set to an initial frequency whereupon a device under test (DUT) transmits a radio frequency (RF) signal to the test system. Characteristics of the RF signal are measured with the test system and used to identify magnitudes and frequencies of spurious signal products. The LO of the test system is reset to one or more subsequent frequencies that are offset from the initial frequency. One or more subsequent RF signals are transmitted from the DUT to the test system, with the DUT maintaining its original signal settings. Characteristics of the subsequent RF signals are measured with the test system and used to identify magnitudes and frequencies of spurious signal products for each of the subsequent LO frequencies. The spurious signal products that have shifted in frequency for each of the subsequent LO frequencies as self-generated signal products can then be identified.
G01R 27/04 - Mesure de résistances, de réactances, d'impédances réelles ou complexes, ou autres caractéristiques bipolaires qui en dérivent, p.ex. constante de temps dans des circuits comportant des constantes réparties
G01R 31/28 - Test de circuits électroniques, p.ex. à l'aide d'un traceur de signaux
G01R 31/00 - Dispositions pour tester les propriétés électriques; Dispositions pour la localisation des pannes électriques; Dispositions pour tests électriques caractérisées par ce qui est testé, non prévues ailleurs
62.
System and method of maintaining correction of DC offsets in frequency down-converted data signals
Circuitry and method for reduce test time for wireless signal systems by using dynamic adaptive correction of DC offsets generated by the test instrument. The data signal is sampled for downstream processing including during pre-, inter-, or post-packet time intervals where no packet-data signal is occurring and where the device's power amplifier is turned off. The sampled data signal is measured for a DC offset occurring during these inter-packet time gaps. Compensating DC offset values are stored in a table indexed by frequency, gain and temperature range. When a subsequent test is carried out at that frequency, gain, and temperature range, the stored compensation value is used to correct the signal. DC offsets continue to be measured, stored and applied to captured signals, continuously refining the compensation values and decreasing the need for time-intensive calibrations. When a measured DC offset exceeds pre-determined limits, the instrument undergo a calibration step.
A method and system for testing packet error rate in electronic devices by transmitting a series of data packets from a testing device to a device under test (DUT) and setting a predefined number of received error-free data packets; evaluating whether a number of data packets from the series of data packets received error-free by the DUT equals the predefined number of received error-free data packets and transmitting additional data packets from the testing device to the DUT, at a power level known to produce zero received-packet errors in a correctly operating DUT, if the number of data packets from the series of data packets received error-free by the DUT does not equal the predefined number of received error-free data packets. Additional possible embodiments include evaluating whether a total number of data packets from the series of data packets and the additional error-free-power-level data packets received error-free by the DUT equals the predefined number of received error-free data packets and transmitting a confirmation data packet to the testing device in response to reception by the DUT of the predefined number of received error-free data packets.
Methods for measuring the sensitivity of a data packet signal receiver are provided by varying the power level or modulation or both of a received data packet signal in a predetermined controlled sequence of data packet signals.
G01R 31/00 - Dispositions pour tester les propriétés électriques; Dispositions pour la localisation des pannes électriques; Dispositions pour tests électriques caractérisées par ce qui est testé, non prévues ailleurs
H04L 12/26 - Dispositions de surveillance; Dispositions de test
65.
Digital communications test system for multiple input, multiple output (MIMO) systems
A digital communications test system and method for testing a plurality of devices under test (DUTs) in which multiple sets of a single vector signal analyzer (VSA) and single vector signal generator (VSG) can be used together to perform error vector magnitude (EVM) measurements for one or more DUTs in parallel, including one or more of composite, switched and multiple input multiple output (MIMO) EVM measurements. This allows N pairs of a VSA and VSG to test N DUTs with N×N MIMO in substantially the sane time as a single VSA and VSG pair can test a single DUT, thereby allowing a substantial increase in testing throughput as compared to that possible with only a single VSA and VSG set.
G01R 31/00 - Dispositions pour tester les propriétés électriques; Dispositions pour la localisation des pannes électriques; Dispositions pour tests électriques caractérisées par ce qui est testé, non prévues ailleurs
H04L 1/24 - Tests pour s'assurer du fonctionnement correct
H04L 1/06 - Dispositions pour détecter ou empêcher les erreurs dans l'information reçue par réception à diversité utilisant la diversité d'espace
H04B 7/04 - Systèmes de diversité; Systèmes à plusieurs antennes, c. à d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées
66.
Digital communications test system for multiple input, multiple output (MIMO) systems
A digital communications test system and method for testing a plurality of devices under test (DUTs) in which multiple sets of a single vector signal analyzer (VSA) and single vector signal generator (VSG) can be used together to perform error vector magnitude (EVM) measurements for one or more DUTs in parallel, including one or more of composite, switched and multiple input multiple output (MIMO) EVM measurements. This allows N pairs of a VSA and VSG to test N DUTs with N×N MIMO in substantially the sane time as a single VSA and VSG pair can test a single DUT, thereby allowing a substantial increase in testing throughput as compared to that possible with only a single VSA and VSG set.
G01R 31/00 - Dispositions pour tester les propriétés électriques; Dispositions pour la localisation des pannes électriques; Dispositions pour tests électriques caractérisées par ce qui est testé, non prévues ailleurs
H04L 1/24 - Tests pour s'assurer du fonctionnement correct
H04L 1/06 - Dispositions pour détecter ou empêcher les erreurs dans l'information reçue par réception à diversité utilisant la diversité d'espace
H04B 7/04 - Systèmes de diversité; Systèmes à plusieurs antennes, c. à d. émission ou réception utilisant plusieurs antennes utilisant plusieurs antennes indépendantes espacées
67.
Method for testing wireless devices using predefined test segments initiated by over-the-air signal characteristics
A method for testing a packet data signal transceiver via its packet data signal interface. The packet data signal interface is used to convey test packet data signals from the test equipment to the DUT, and response packet data signals responsive to such test packet data signals from the DUT to the test equipment.
A system and method for testing a data packet signal transceiver in which multiple network addresses (e.g., media access control, or MAC, addresses) are used to establish synchronization of the device under test and the test equipment controlling the test. In accordance with an exemplary embodiment, synchronization is established using a first MAC address, following which testing is conducted using a second MAC address.
A digital communications test system and method for testing a plurality of devices under test (DUTs) in which multiple sets of a single vector signal analyzer (VSA) and single vector signal generator (VSG) can be used together to perform error vector magnitude (EVM) measurements for one or more DUTs in parallel, including one or more of composite, switched and multiple input multiple output (MIMO) EVM measurements. This allows N pairs of a VSA and VSG to test N DUTs with NxN MIMO in substantially the sane time as a single VSA and VSG pair can test a single DUT, thereby allowing a substantial increase in testing throughput as compared to that possible with only a single VSA and VSG set.
G01R 31/00 - Dispositions pour tester les propriétés électriques; Dispositions pour la localisation des pannes électriques; Dispositions pour tests électriques caractérisées par ce qui est testé, non prévues ailleurs
70.
Digital communications test system for multiple input, multiple output (MIMO) systems
A digital communications test system and method for testing a plurality of devices under test (DUTs) in which multiple sets of a single vector signal analyzer (VSA) and single vector signal generator (VSG) can be used together to perform error vector magnitude (EVM) measurements for one or more DUTs in parallel, including one or more of composite, switched and multiple input multiple output (MIMO) EVM measurements. This allows N pairs of a VSA and VSG to test N DUTs with N×N MIMO in substantially the sane time as a single VSA and VSG pair can test a single DUT, thereby allowing a substantial increase in testing throughput as compared to that possible with only a single VSA and VSG set.
G01R 31/00 - Dispositions pour tester les propriétés électriques; Dispositions pour la localisation des pannes électriques; Dispositions pour tests électriques caractérisées par ce qui est testé, non prévues ailleurs
71.
Method for testing data packet transceiver using loop back packet generation
A method for testing a data packet transceiver as a device under test (DUT) by communicating, between one or more test instruments and the DUT, multiple data packets having at least one mutually distinct signal characteristic, such as data packet type, transmission power or transmission frequency.
An apparatus for testing a communication circuit includes a detection module and a capture module. The detection module provides an enable signal in response to receiving at least one predetermined plurality of data from a communication device under test. The capture module captures at least one other predetermined plurality of data in response to the enable signal.
A method is disclosed for measuring one or more parameters of a signal generated by a signal generator. The method employs capturing and analyzing a train of data packets or other forms of signals from a single transmission to obtain measured values for the one or more parameters. The obtained measured values may be used in valuing a calibration of a signal generator or in verifying the already calibrated values of the signal generator. In accordance with a preferred embodiment, the train of data packets contains packets having different properties.
A system for testing a communication device includes a testing module, a measurement module, and a control module. The testing module transmits one or more first test signals based on a first test sequence. The measurement module acquires test data by receiving one or more second test signals that are based on the one or more first test signals. The control module initiates the first test sequence in response to receiving a start test signal from an analysis system. The control module transfers the test data to the analysis system in response to a transfer data request. The control module initiates a second test sequence while the analysis system is analyzing the test data. The testing module generates and transmits one or more third test signals based on the second sequence when the second test sequence has been initiated.
G01R 31/3193 - Matériel de test, c. à d. circuits de traitement de signaux de sortie avec une comparaison entre la réponse effective et la réponse connue en l'absence d'erreur
A test equipment for testing a wireless communication device includes a wireless transceiver, memory, and a controller. The wireless transceiver transmits a first and second series of packets. The wireless transceiver receives a power level indicator that is based on at least one of the first series of packets. The memory stores the power level indicator. The controller performs a signal strength test. More specifically, the controller controls the transceiver to transmit the first series of packets at a first power level. The controller stores the power level indicator in memory when the power level indicator is received by the transceiver. The controller controls the transceiver to transmit the second series of packets at a second power level.
A distributed test equipment system for testing analog communications systems. One or more analog signal receivers and one or more computers are connected via a packet-switched network such that each computer can remotely control and receive signal data from each receiver. Analog signal data measured by each receiver is available for relaying to each computer where it is processed for analysis in conformance with respective user commands.
G06F 19/00 - Équipement ou méthodes de traitement de données ou de calcul numérique, spécialement adaptés à des applications spécifiques (spécialement adaptés à des fonctions spécifiques G06F 17/00;systèmes ou méthodes de traitement de données spécialement adaptés à des fins administratives, commerciales, financières, de gestion, de surveillance ou de prévision G06Q;informatique médicale G16H)
77.
Method and apparatus for generating reference transmission signal for use in testing communications receivers
A method and apparatus for generating a reference transmission signal for use in testing a communications system. A data packet transmission signal containing a plurality of reference data is captured and digitized, following which reference data is retrieved. The retrieved data is used to modulate a carrier signal to produce a digital transmission signal, which is stored for later use, such that impairments in a signal from a traditional trusted unit are substantially removed, thereby minimizing uncertainty during later testing using such signal.
An apparatus for testing a wireless communication device includes a receiver, a capture module, and a control module. The receiver receives at least one test packet transmitted from the wireless communication device. The capture module captures at least a portion of the at least one test packet. The control module selectively controls the capture module to capture at least the portion based on a predetermined test flow. In one example, the at least one test packet is transmitted by the wireless communication device according to the predetermined test flow. In one example, control module selectively controls the capture module to capture at least the portion based on an expected calibration value associated with the at least one test packet. In one example, the control module selectively controls the capture module to capture at least the portion based on a predetermined value of interest.
A system and method for testing a plurality of packet data transmitters in which multiple devices-under-test (DUTs) are tested by providing similar transmit data streams to the DUTs each of which, in response thereto, provides a respective packet data signal. At least a portion of each packet data signal is captured to provide captured data packets, which are processed to provide multiple sets of test data respective ones of which, in turn, are analyzed in view of the transmit data to determine an operational status of each DUT.
G01R 31/28 - Test de circuits électroniques, p.ex. à l'aide d'un traceur de signaux
G01R 31/26 - Test de dispositifs individuels à semi-conducteurs
G11C 29/00 - Vérification du fonctionnement correct des mémoires; Test de mémoires lors d'opération en mode de veille ou hors-ligne
G06F 11/00 - Détection d'erreurs; Correction d'erreurs; Contrôle de fonctionnement
G06F 13/00 - Interconnexion ou transfert d'information ou d'autres signaux entre mémoires, dispositifs d'entrée/sortie ou unités de traitement
G06F 13/28 - Gestion de demandes d'interconnexion ou de transfert pour l'accès au bus d'entrée/sortie utilisant le transfert par rafale, p.ex. acces direct à la mémoire, vol de cycle
80.
Apparatus and method for operating automated test equipment (ATE)
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.
A method for selectively capturing selected portions of multiple data packets within a packet data signal for analysis by capturing only desired or necessary portions of the data packets and assembling them into substantially contiguous data streams prior to transferring them for analysis.
A method for testing a wireless transceiver embedded within a wireless data communication system that also includes a host processor with minimal interaction between the wireless transceiver and the host processor during such testing. The wireless signal interface between the wireless data communication system and external test equipment is used to convey test initiation or data signals from the external test equipment to the wireless data communication system, and responsive data or acknowledgement signals from the wireless data communication system to the external test equipment.
A signal analyzer and method for measuring signal compression levels of one or more individual orthogonal frequency division multiplexed (OFDM) signals among a plurality of OFDM signals within a composite signal.
A method is disclosed for measuring one or more parameters of a signal generated by a signal generator. The method employs capturing and analyzing a train of data packets or other forms of signals from a single transmission to obtain measured values for the one or more parameters. The obtained measured values may be used in valuing a calibration of a signal generator or in verifying the already calibrated values of the signal generator. In accordance with a preferred embodiment, the train of data packets contains packets having different properties.
A radio frequency (RF) transceiver for providing substantially coincident communication of RF and related baseband control signals. Baseband circuitry within the transmitter and receiver sections provides for storage of related control data which can be used in real time to control processing of the transmitted or received data, respectively.
Methods for measuring the sensitivity of a data packet signal receiver are provided by varying the power level or modulation or both of a received data packet signal in a predetermined controlled sequence of data packet signals.
G01R 31/00 - Dispositions pour tester les propriétés électriques; Dispositions pour la localisation des pannes électriques; Dispositions pour tests électriques caractérisées par ce qui est testé, non prévues ailleurs
brevets
