Abstract: A method of testing vehicular radar includes acquiring binary phase codes of transmitters in a radar DUT; acquiring desired FOVs and desired angular resolutions of the transmitters to determine target angles of emulated targets; calculating far field phases of a PMCW signal for binary phase states of the transmit array at each of the target angles to determine resultant phase symbol streams; calculating excess roundtrip time delay for each emulation delay, between the DUT and the emulated targets, and each setup delay between the DUT and each emulator receiver; time-shifting the resultant phase symbol streams by the excess roundtrip time delays; subtracting the time-shifted resultant phase symbol streams from the resultant phase symbol streams to obtain difference phase symbol streams; modulating a PMCW signal transmitted by the DUT by the difference phase symbol streams; and emulating the echo signals at the target angles in response to the modulated PMCW signal.

Abstract: A beamformer for providing signals from a device under test (DUT) and an emulator is disclosed. The beamformer includes: a radio frequency (RF) interface configured to receive a plurality of radio beams and convert a data stream comprising a plurality of radio beams from analog signals to digital signals; a radio samples processor configured to receive the digital signals, decouple data samples from the plurality of radio beams, and recombine the data samples to provide a single data stream to a corresponding single device used by an end-user; and a local processor adapted to dynamically adjust operational parameters in the radio samples processor of the single data stream.

Abstract: A MIMO target emulation system for testing a mmWave radar sensor having multiple radar transmitters and receivers includes a coupling probe antenna array for receiving radar signals from the radar transmitters and for sending emulated target echo signals to the radar receivers; emulator receivers for down converting and digitizing the radar signals; a processing unit that decouples the digital radar signals, retrieves target parameters corresponding to emulated targets, generates emulated target echo signals corresponding to the targets in response to the decoupled digitized radar signals using the target parameters, and pre-decoupling the emulated target echo signals; and emulator transmitters for performing digital to analog conversion of the emulated target echo signals and up converting frequencies of the analog emulated target echo signals.

Abstract: A multichannel interpolator has an input that receives input data that consists of interleaved channel data from a plurality of data channels. A block random access memory (BRAM) stores data samples from the input data received from the input. Input control logic receives the data samples from the input and places the data samples into the BRAM. Interpolator logic interpolates the data samples to produce output data. The output data is interpolated at an interpolation ratio programmed by a user. The interpolator logic includes a phase generator that calculates a value indicating the interpolation ratio, and a fractional template block that provides a fractional template used to interpolate the data samples to produce the output data, the fraction template block selecting, based on the value calculated by the phase generator. The fractional template is used to interpolate the data samples to produce the output data.

Abstract: A method and test system are provided for selectively emphasizing waveforms on a display of the test system. The method includes presenting a graphical user interface (GUI) on the display of the test system; receiving through the GUI a selection of channels to be viewed on the display; receiving through the GUI an indication enabling a waveform emphasis feature; receiving through the GUI an indication of a cycle time; and displaying through the GUI multiple waveforms, respectively produced by the selected channels, by sequentially emphasizing each waveform of the multiple waveforms for the cycle time as a viewable waveform, while de-emphasizing each remaining waveforms of the multiple waveforms in relation to the emphasized waveform for the cycle time.

Abstract: A switching converter has a first converter output for connection to a user load and a second converter output for connection to the user load. A first direct current rail power negative terminal has a first positive output and a first negative output connected to the second converter output. A second direct current rail power negative terminal has a second negative output and a second positive output connected to the first positive output. A first switch has a first positive terminal connected to the first positive output, a first negative terminal and a first control terminal. A second switch has a second positive terminal connected to the first negative terminal, a second negative terminal connected to the second negative output, and a second control terminal. A pulse width modulator has a first modulator output connected to the first control terminal, and a second modulator output connected to the second control terminal.

Abstract: A system and method are provided for a analyzing a refresh rate of a device under test (DUT) such as a volatile memory device that includes a memory and an associated memory controller. The method includes acquiring refresh data based upon signals between the memory and the memory controller of the volatile memory device over a time period, determining the refresh rate of the volatile memory device for time windows of the time period based upon the acquired refresh data, and displaying the refresh rate of the volatile memory device, compared to a refresh threshold, on a graphical user interface (GUI), for each of the time windows over the time period.

Abstract: A variable frequency multiplier circuit for frequency multiplying an input signal provided by an ultra-low phase noise signal source includes a tone generator configured to generate a multiple tones from the input signal; a signal separating circuit configured to separate the multiple tones into tones of interest and idler tones, where the tones of interest are separated into one or more groups and outputted from the signal separating circuit, and the idler tones are terminated; an amplification circuit configured to amplify each group of the tones of interest to optimize small and large signal responses; and a switched filter bank configured to selectively connect a selected tone from the tones of interest to a circuit output.

Abstract: A deskew fixture includes first and second deskew probe points for contacting first and second probes, respectively, during deskew calibration, a signal generating circuit for generating a calibration signal provided to the first and second deskew probe points, and a feedback loop for automatically self-calibrating the deskew fixture. The feedback loop includes first and second analog to digital converters (ADCs) for digitizing the calibration signal at the first and second deskew probe points while contacting the first and second probes, respectively, to provide first and second digitized calibration signals, and a processing unit programmed to determine inherent skew of the deskew fixture between the first and second skew probe points using the first and second digitized calibration signals, and to provide the determined inherent skew to a test instrument for use in the deskew calibration of the first and second probes.

Abstract: A system for recording and analyzing a data stream, a method for analyzing a data stream, and a computer readable memory that stores instructions that cause a computer to execute a method of analyzing a data stream are disclosed. The system includes an input port, output port, buffer, and controller. The controller identifies a segment, referred to as a new extracted data segment (EDS) of the data stream stored in a buffer, the new EDS satisfying an extraction protocol. The controller compares the new EDS to each of a plurality of reference data segments (RDSs) using a similarity protocol. A new RDS is created if the new EDS is not similar to an existing EDS. If the new EDS is similar to an RDS, the RDS is updated to list that new EDS as being similar.

Abstract: A system is provided for dynamically reconfiguring clock output signals, without clock loss and glitches. The system includes an oscillator generating a clock input signal, first and second dynamic reconfigurable clock dividers, an AND logic gate and an interface. The first and second dynamic reconfigurable clock dividers include counters that output first and second clock output signals having multiple periodic cycles, respectively, and cycle complete signals in response to completion of each periodic cycle. The AND logic gate outputs an aggregated cycle complete signal in response to the cycle complete signals from the first and second dynamic reconfigurable clock dividers. The interface provides reconfiguration commands to the first dynamic reconfigurable clock divider changing frequency and/or phase of the first clock output signal.

Abstract: A method for operating a data processing system to discover the attributes of instruments in a set of instruments connected thereto is disclosed. The method causes the data processing system to determine all instruments in the set of instruments connected thereto by sending a first query on each communication link connected to the data processing system. The data processing system receives a response that identifies one of the instruments and a model identification code for that instrument. The data processing system retrieves model configuration information from an instrument catalog database attached to the data processing system based on the manufacturer's catalog information. The model configuration information includes an option that is available on the one of the instruments having the manufacturer's catalog information and a query that will cause that instrument to provide information on whether that option is installed on the one of the instruments.

Abstract: A system and method are provided for measuring absolute phase noise of a test signal from a DUT using a reference source for generating an RF reference signal, a mixer for mixing the RF reference signal and an input signal, an adjustable DC voltage source for outputting a DC voltage, and a PLL for maintaining a 90 degree quadrature between the RF reference and input signals. The method includes mixing RF calibration signals and the RF reference signal to provide calibration phase signals, at least one of the RF calibration signals having one-tone AM modulation; monitoring modulation tone frequency of the one-tone AM modulation; adjusting the DC voltage output by the adjustable DC voltage source to minimize a voltage level of the tone frequency being monitored; mixing the test signal and the RF reference signal to provide a measurement phase signal for measuring absolute phase noise of the test signal.

Abstract: A device for detecting and selectively reflecting an incident microwave signal or millimeter-wave signal is disclosed. The device includes a plurality of antennae disposed in an array; and a diode disposed at each input of each antenna, each diode having an input adapted to selectively receive a reverse bias signal, or a zero bias signal, or a forward bias signal. The device also includes a switching device connected to each input, and configured to selectively apply the forward bias signal, or the reverse bias signal or the zero bias signal to each of the diodes. In forward bias, each of the plurality of antennae reflects the incident microwave signal or millimeter wave signal; and in zero bias or reverse bias each of the plurality of antennae detects the incident microwave signal or millimeter wave signal.

Abstract: A method of operating a first data processing system having a screen for responding to a vector gesture performed on that screen is disclosed. The method includes estimating a direction and assuming an identity for the vector gesture prior to the vector gesture being completed. A command that depends on the estimated direction and assumed identity is executed, the command being a command that would be required to update a current state of the first data processing system if the assumed identity of the vector gesture is correct. The command is executed prior to the vector gesture being completed. The current state of the first data processing system is then updated based on the data generated by the command. After the vector gesture has been determined to have been completed, the first data processing system is updated to a state indicated by the completed vector gesture.

Abstract: A method is provided for calibrating a test system, including an RF source combined with a VNA connected to or embedded in a test instrument. The method includes connecting to a power meter at the test port; generating an RF signal at an RF source as an incident signal, and providing the incident signal to the power meter through the test port; measuring a forward power wave of the incident signal using a first receiver; measuring a reverse power wave of a reflected signal using a second receiver; measuring output power at the test port using the power meter; and calculating magnitude errors of the first receiver and the second receiver using the measured forward power wave, the measured reverse power wave, and the measured output power by the power meter, and determining magnitude error correction terms of the forward and reverse power waves to remove the magnitude errors.

Abstract: A method is provided for finding vulnerabilities of a server and a client communicating according to a communication protocol standard. The method includes establishing a connection between the server and client according to the communication protocol standard; generating valid packets from a communication protocol model, the valid packets being compliant with the communication protocol standard; generating mutated packets by mutating the valid packets according to mutation probabilities; sending the mutated packets from the server to the client or from the client to the server during different states of the communication protocol model; receiving first responses to the mutated packets; sending invalid packets from the server to the client or from the client to the server during different states of the communication protocol model; receiving second responses to the invalid packets; and identifying anomalies of the client or server based on the received first and/or second responses.

Abstract: A test apparatus includes: a communication interface for connection to a enodeb of a mobile telecommunication network provided with beamforming functionality, the communication interface being configured to receive communication traffic between the enodeb and a mobile terminal coupled in communication to the enodeb (3); a beamforming-testing unit, configured to receive communication-channel-quality signals (RSRPS) corresponding to each communication beam (B1, B2, . . . , BN), the communication-channel-quality signals (RSRPS) representing a signal power received by the mobile terminal. The beamforming-testing unit checks whether communication settings of the enodeb in relation to selection of the communication beams (B1, B2, . . . , BN) are consistent with the communication-channel-quality signals (RSRPS).

Abstract: A current supply device includes a multiplexed digital bus, an output terminal, and a group of power supplies connected in parallel between the multiplexed digital bus and the output terminal. The group of power supplies are controlled via the multiplexed digital bus such that a combined output current of the group of power supplies is applied to the output terminal.

Abstract: An analog delay line includes a clock generator, an analog sampling circuit, a bank of analog memory cells, a memory controller, an analog readout circuit, and an analog multiplexer. The clock generator is configured to output plural reception clock signals of different frequencies and plural transmission clock signals of different frequencies, the transmission clock signals offset in accumulated phase relative to the reception clock signals. The analog sampling circuit is controlled by at least one of the reception clock signals, and is configured to output a sequence of sampled voltages of an analog input signal. The memory controller is configured to control a write operation at a write frequency of at least one of the reception clock signals and a read operation at a read frequency of at least one of the transmission clock signals.