Abstract: A system and method are provided for emulating echo signals using test equipment, including an antenna and an I/Q mixer, in response to a radar signal transmitted by a radar under test. The method includes receiving the radar signal from the radar under test, where a reflection component of the radar signal is reflected from at least the antenna; mixing the received radar signal as a local oscillator (LO) signal with I and Q signals at the I/Q mixer to output a mixing product as a radio frequency (RF) signal, where a leakage component of the LO signal leaks through the I/Q mixer; substantially canceling the reflection component of the radar signal using the leakage component of the LO signal; and transmitting the RF signal as the emulated echo signal to the radar under test, wherein the emulated echo signal indicates at least a range to the emulated target.

Abstract: An apparatus and method: access repeated copies of an OFDM output signal produced by a device in response to corresponding repeated copies of an OFDM input signal; for each copy of the OFDM output signal, time align the OFDM output symbols to the OFDM input symbols, and de-rotate a phase of the OFDM output signal with respect to the OFDM input signal; coherently sum and average the copies of the OFDM output signal; determine a variance of each copy of the OFDM output signal, and an ensemble variance of all of the copies of the OFDM output signal; discard copies of the OFDM output signal whose variance differs from the ensemble variance by more than a threshold amount to produce a qualified set of copies; determine a mean value of the qualified set of copies; and determine a total noise power of the qualified set of copies from the mean value.

Abstract: A direct current (DC) power rail probe includes a single-ended probe tip, and a two-path circuit having an input coupled to the single-ended probe tip and an output configured for connection to measurement equipment such as an oscilloscope. The two-path circuit includes an alternating current (AC) path in parallel with a feed-forward (FF) path, the AC path including a capacitive element, and the FF path including a series connection of at least one resistive element and an amplifier. The probe tip and two-path circuit are selectively operable in a non-attenuating mode and an attenuating mode.

Abstract: A measurement apparatus includes external terminals configured for connection to a device-under-test (DUT), the external terminals including first and second force terminals and first and second sense terminals. The measurement apparatus further includes a controller and a feedback loop configured in a current feedback mode to sense a current flowing from the first force terminal to the second force terminal, and in a voltage feedback mode to sense a voltage across the first and second sense terminals. The measurement apparatus further includes a measurement path configured to measure a least one of a voltage and current across a pair of the external terminals and to supply the measured at least one of the voltage and current to the controller.

Abstract: The subject matter described herein includes methods, systems, and computer readable media for stateless service traffic generation. A method for stateless service traffic generation occurs at a network equipment test system. The method includes generating, at a first transmit port associated with the network equipment test system, a first test packet flow comprising one or more packets, wherein the first test packet flow indicates a match and action instruction for triggering an action at a second transmit port associated with the network equipment test system; sending the first test packet flow toward a node associated with a data center under test (DCUT); receiving the first test packet flow from the node associated with the DCUT; and performing, using the match and action instruction, the action at the second transmit port associated with the network equipment test system.

Abstract: One method occurs at a test system controller of a network test system implemented using at least one processor. The method includes establishing agent association criteria for a test system traffic generation agent to be deployed in a cloud computing system under test (SUT) and receiving a registration message from the test system traffic generation agent in response to a launching of the test system traffic generation agent in the cloud computing SUT. The method further includes obtaining agent property values associated with the one test system traffic generation agent from the registration message and sending test configuration data to the test system traffic generation agent in response to determining a match between the agent property values and the agent association criteria, wherein the test configuration data configures the test system traffic generation agent to operate as a predefined network segment in the cloud computing SUT.

Abstract: A method for reconstructing uncorrectable forward error correction (FEC) data includes generating and transcoding a known bit sequence and transmitting a FEC encoded codeword that includes a payload containing the transcoded known bit sequence through a component under test. The method further includes receiving the FEC encoded codeword transmitted via the component under test and determining that the encoded contents of the FEC encoded codeword contains a number of symbol errors that exceeds a predefined threshold. The method also includes utilizing stored scramble seed bits corresponding to an immediately preceding FEC encoded codeword and the transcoded known bit sequence to generate a reconstructed codeword.

Abstract: An integrated circuit package includes a transmission line structure, wire bonds, a first post and a second post. The transmission line structure runs from a printed circuit board (PCB) to an integrated circuit (IC) and includes a center transmission line between two ground lines and sealed from exposure to air. The wire bonds connect the transmission line structure to pads on the integrated circuit from where the center transmission line exits the integrated circuit package. The wire bonds are selected to have an impedance matched to impedance of the integrated circuit. The first post supports the center transmission line where the center transmission line enters the integrated circuit package from the printed circuit board. The second post supports the center transmission line where the center transmission line exits the integrated circuit package to connect to the wire bonds.

Abstract: A method and system are provided for reducing noise in a time domain waveform of a signal under test (SUT). The method includes performing cross-correlation of multiple first complex signals and multiple second complex signals, respectively, from the SUT to provide multiple cross-correlated signals, respectively, where the cross-correlated signals have amplitude components and no phase components from the SUT, and where the first and second complex signals include uncorrelated noise, respectively. The method further includes determining an average of the cross-correlated signals to provide an average cross-correlated signal with reduced uncorrelated noise; obtaining a representative phase component from one of the first complex signals or the second complex signals; and combining the representative phase component with the average cross-correlated signal to provide a representative complex signal corresponding to the SUT with reduced uncorrelated noise.

Abstract: A test system for testing a device under test includes: a signal processor configured to generate a plurality of independent signals and to apply first fading channel characteristics to each of the independent signals to generate a plurality of first faded test signals; a test system interface configured to provide the plurality of first faded test signals to one or more signal input interfaces of the device under test (DUT); a second signal processor configured to apply second fading channel characteristics to a plurality of output signals of the DUT to generate a plurality of second faded test signals, wherein the second fading channel characteristics are derived from the first fading channel characteristics; and one or more test instruments configured to measure at least one performance characteristic of the DUT from the plurality of second faded test signals.

Abstract: an orthogonal frequency division multiplexed (OFDM) output signal produced by a device in response to an OFDM input signal is accessed. The OFDM input signal includes OFDM input symbols in the time domain and the OFDM output signal includes OFDM output symbols in the time domain. The OFDM output symbols are time-aligned to the OFDM input symbols and a phase of the OFDM output signal is de-rotated with respect to the OFDM input signal. A complex equalization filter is applied to the OFDM output symbols in the time domain to obtain an estimate of the OFDM input symbols A distortion signal of the OFDM output signal is determined by subtracting the estimate of the OFDM input symbols. An error vector magnitude (EVM) is determined by dividing a root mean square of the distortion, by a root mean square of the OFDM input signal.

Abstract: An apparatus that searches an input stream having a sequence of N-bit wide data words for a pattern using a plurality of small FSMs is disclosed. The apparatus includes a plurality of sub-word FSMs and a combiner. Each sub-word FSM has an input word size less than N-bits. Each FSM processes a corresponding segment of the N-bit words and generates a match output indicative of a possible match to the pattern when one of the input words to that FSM is received and that FSM moves to a predetermined match state. The combiner receives the match outputs from all of the sub-word FSMs and generates a pattern match output if all of the sub-word FSMs indicate a match to the pattern. The pattern is a variable pattern. In one embodiment, the FSMs are single bit FSMs.

Abstract: According to one method, the method occurs at a network node configured to relay network message information or derivative information to avoid resource contentions between user equipment (UE). The method includes receiving a first temporary UE identifier (TUEI) associated with a first UE for requesting a radio resource within a serving cell; assigning, using the first TUEI, the radio resource to the first UE; generating, using at least a conversion algorithm, a second value based on the first TUEI, wherein the second value has a higher entropy characteristic than the first TUEI, thereby reducing the likelihood of the second value including an encoded message decodable by a second UE when relayed by the network node; and broadcasting a message including the second value to a plurality of UEs including the second UE.

Abstract: An apparatus for providing a test signal from a device under test (DUT) to a measurement instrument is disclosed. The apparatus includes a probe head configured to receive an electrical signal from the DUT. The probe head includes an electro-optic modulator. The apparatus also includes a control box, which includes an optical source. The optical source is configured to provide an input optical signal to the electro-optic modulator, which is configured to provide an output optical signal based on the electrical signal from the DUT. The control box also includes an optical bias control circuit. Only a bias control signal is provided to the electro-optic modulator.

Abstract: A method for configuring a network service system for performing a network service using AR comprises: at a user device executing an AR cabling application: communicating, to an AR cabling subsystem of the network service system, network service task identification information usable for identifying at least one testing or monitoring case (TMC) definition provisioned within the network service system; receiving, from the AR cabling subsystem of the network service system, cabling instructions based on the network service task identification information, wherein the cabling instructions is for instructing the user to perform a cabling task associated with the at least one TMC definition, wherein the cabling task involves connecting at least one cable to one or more physical ports of a physical resource of the network service system; and providing, via a display and using at least one AR element, the cabling instructions for instructing the user to perform the cabling task.

Abstract: A method for software-based emulation of media access control security (MACsec) includes generating, using a software-based emulated MACsec packet generator, a plurality of emulated MACsec packets, each of the emulated MACsec packets including a MACsec header having a packet number field value that remains fixed across the emulated MACsec packets. The method further includes configuring a device under test to accept plural MACsec packets with the same MACsec packet number field value. The method further includes transmitting the emulated MACsec packets to the device under test (DUT). The method further includes determining whether the DUT responds correctly to the emulated MACsec packets given a replay protection configuration of the DUT. The method further includes generating test output based on a result of the determination.

Abstract: A method for providing timing security in a time sensitive network (TSN), includes monitoring TSN times in timing synchronization packets exchanged between TSN network nodes. The method further includes monitoring TSN timing values calculated by TSN network nodes. The method further includes determining, using TSN times and TSN timing values, whether a timing attack is indicated. The method further includes, in response to determining that a timing attack is indicated, performing a timing attack effects mitigation action.

Abstract: A method and system are provided for generating a trigger signal from a radar signal received over the air from a radar under test. The method includes detecting power of the radar signal received from the radar under test at a radio frequency (RF) power detector, the radar signal including multiple bursts of RF energy in a burst pattern; identifying repeating radar frames from the burst pattern using the detected power of the radar signal, each radar frame having at least one burst; and creating trigger signals corresponding to the radar frames, respectively, by synchronizing to the at least one burst in each radar frame.

Abstract: The subject matter described herein includes methods, systems, and computer readable media for proactive network testing. One method for proactive network testing includes receiving, by a test controller and via a network tap, at least one metric associated with live network traffic; determining, by the test controller and using the at least one metric and a threshold value associated with the at least one metric, that a network test is to be performed; configuring, by the test controller, a first test agent to execute the network test; and executing, by the first test agent, the network test.

Abstract: A system for measuring voltage includes a pulse-width modulator or voltage controlled oscillator (VCO) configured to receive an input voltage waveform from a DUT, and to output a pulse-width modulated (PWM) signal or frequency modulated (FM) signal mapped to the input voltage waveform, respectively; an optical transmitter configured to be modulated by the PWM signal or the FM signal to output an optical pulse signal having pulse widths corresponding to pulse widths of the PWM signal or equal to the frequency of the FM signal, respectively; an optical receiver configured to receive the optical pulse signal over an optical link and to convert the optical pulse signal to an electrical current; a transimpedance amplifier (TIA) configured to convert the electrical current to a voltage signal; and at least one filter or detection circuit configured to recover the input voltage waveform or provide numeric values corresponding to the input voltage waveform.