11 results about "Vector signal analyzer" patented technology

Systems and methods for direct-to-RF (radio frequency) software-defined radio implementation of an active load-pull system are provided. A system may include a controller, a primary field-programmable gate array (FPGA) to control and collect waveform data from vector signal analyzers (VSAs), each comprising an analog-to-digital converter (ADC) connected to an ADC signal-conditioning circuit to directly capture RF measurements of an input signal at an RF fundamental frequency of test and harmonics, each ADC signal-conditioning circuit altering a signal amplitude and isolating a wanted RF frequency of measurement at either the RF fundamental frequency of test or a harmonic to be received by its ADC, first and second couplers generating each input signal by extracting forward and reverse traveling waves at RF from input and output ports of a device under test (DUT), the VSAs capturing the input signals directly at the RF fundamental frequency of test or a harmonic.

The invention provides an automatic test system and method for a third-party high-power repeater, and relates to the technical field of automatic test equipment, and the system comprises an integrated reconfigurable passive link box, a control host, a vector signal generator and a vector signal analyzer. The integrated reconfigurable passive link box comprises a box body, a radio frequency switch matrix network, an embedded function network, a control port, an input port, an output port, an uplink interface and a downlink interface. The radio frequency switch matrix network and the embedded function network are arranged in the box body. The input port, the output port, the uplink interface and the downlink interface are arranged on the surface of the box body. The vector signal generator is connected with the input port, the vector signal analyzer is connected with the output port, and a third-party high-power repeater to be tested is arranged between the uplink interface and the downlink interface. According to the invention, the radio frequency switch matrix network and the embedded function network are packaged in the integrated reconfigurable passive link box, and the control host is utilized to carry out automatic testing on the third-party high-power repeater according to the preset process, so that frequent operation processes are avoided, and damage to instruments is reduced.

A measurement system is described for the comprehensive characterization of millimeter-wave / sub-THz devices under both continuous-wave (CW) and modulated signal excitation. CW measurement setups, which include a vector network analyzer (VNA) and VNA frequency extenders (VNA-EXT) are enhanced by the integration of an IF vector signal generator (VSG) and IF vector signal analyzer (VSA). The measurement system incorporates a processing unit configured and operable to process a modulated test signal to mitigate nonlinear behavior. A linearization algorithm is used to linearize the frequency multipliers within the VNA-EXT, ensuring error-free RF modulated signal generation at a device under test (DUT) input reference plane.

This utility model relates to the technical field of measurement devices, and discloses a multi-path synchronous measurement device, including a vector signal generator and a vector signal analyzer. A signal storage unit is provided between the vector signal generator and the vector signal analyzer. The signal storage unit is used to sequentially receive and store multiple vector frequency signals generated in the vector signal generator, and to sequentially receive and store multiple acquisition frequency signals set in the vector signal analyzer. It also includes a controller and a device under test (DUT). The controller is electrically connected to the signal storage unit, and the DUT is electrically connected to both the signal storage unit and the vector signal analyzer. This utility model aims to increase measurement speed and improve testing efficiency.

The invention discloses an electromagnetic compatibility detection method based on vector signal analysis, relates to the technical field of electromagnetic compatibility detection, is used for solving the problem that the deviation of an electromagnetic compatibility evaluation result is increased, and is suitable for compatibility evaluation of multi-system wireless communication equipment such as Wi-Fi6 / 7. All wireless signals in a detection area are collected and recognized in real time through a vector signal analyzer, coexistence conditions of equipment are automatically judged, and a compatible detection mechanism is triggered; performing comprehensive analysis on modulation precision, carrier frequency offset and modulation distortion of the signal by using time domain signal down-conversion and IQ component extraction technologies; on the premise that the signal quality is normal, the transmission characteristic and interference risk of the router are quantitatively evaluated by calculating the channel power, the adjacent channel leakage power ratio and the out-of-band transmission intensity, a signal interference source can be accurately identified in a multi-device coexistence environment, and high-precision detection of the electromagnetic compatibility performance of wireless devices is achieved.

The invention provides a high-precision EMI diagnosis and pretest system based on a vector signal analyzer, and belongs to the technical field of data processing, and the system specifically comprises the steps: according to EMI interference signal source data in an interference signal source combination in different superposition risk types, determining an interference signal in a darkroom when it is determined that an environment interference signal in the darkroom needs to be considered; the method comprises the following steps: acquiring a deviation condition of vector signal characteristics of interference signal source combinations between different test targets, determining an identification strategy for identifying interference signals in environment interference signals according to the deviation condition, and determining the identification strategy for identifying the interference signals in the environment interference signals according to different identification interference signals. According to the invention, the method determines the diagnosis test method of the test target according to the coincidence condition between the superposed interference signals of the test target and other test targets in combination with the recognition strategy for recognizing the interference signals, and improves the reliability of test processing.

The invention provides a radar target simulator pull-off interference calibration method and device, a radio frequency port of a signal generator is connected to a second port of a circulator, a radio frequency input port of a vector signal analyzer is connected to a third port of the circulator, and a radio frequency port of a radar target simulator is connected to a first port of the circulator; the control computer is connected with the vector signal analyzer. According to the method, the problem that the signal type is single is avoided, the waveform used by the echo can be subjected to waveform reconstruction and is completely consistent with the excitation signal required by the simulator, radar analog signals of any modulation type can be calibrated, and the application scene of the scheme is greatly expanded. Measurement is carried out by adopting a method of taking a trigger signal as synchronization, only a key time period with a target and an interference signal needs to be acquired, the memory capacity can be solved, a faster sampling rate is ensured to be used, more sampling points are obtained in the same time period, and the measurement accuracy is improved.

This invention discloses an electromagnetic compatibility (EMC) testing method based on vector signal analysis, belonging to the field of EMC testing technology. It addresses the problem of increasing deviations in EMC performance evaluation results and is applicable to the compatibility performance evaluation of multi-standard wireless communication devices such as Wi-Fi 6 / 7. The method uses a vector signal analyzer to collect and identify all wireless signals within the detection area in real time, automatically determining device coexistence conditions and triggering a compatibility detection mechanism. It utilizes time-domain signal down-conversion and IQ component extraction techniques to comprehensively analyze signal modulation accuracy, carrier frequency offset, and modulation distortion. Under normal signal quality conditions, it quantitatively evaluates the router's transmission characteristics and interference risks by calculating channel power, adjacent channel leakage power ratio, and out-of-band transmit strength. This enables accurate identification of signal interference sources in multi-device coexistence environments, achieving high-precision testing of the EMC performance of wireless devices.

The invention discloses an automatic radio frequency index testing system and method, and relates to the technical field of wireless communication radio frequency index testing. The system comprises: a test board, wherein different signal paths are formed by controlling connection or disconnection of a plurality of radio frequency switch devices, attenuators, combiners and frequency dividers on the test board; the Gaussian noise generator is used for generating white noise so as to test different signal paths on the test board; the vector signal analyzer is used for measuring spectrum energy of signals passing through different signal paths on the test board and generating a first parameter calibration table for the test board based on white noise generated by the Gaussian noise generator; and the cable modem terminal system is used for sending a downlink test signal or receiving an uplink test signal through the signal path of the test board for the tested equipment under the condition that the test instruction is received. According to the invention, the wave band distribution requirements of different radio frequency working scenes are met, and the automation level and the test consistency are improved.

The application relates to the technical field of signal transmission testing, in particular to a real-time vector signal analyzer based on FPGA and a signal processing method, the analyzer comprises a circuit board, an FPGA chip, a DSP coprocessor, an analog-to-digital converter, a power supply, a power management chip, an analog front end, a button, an interface, a shell, a display screen and a metal plate, the method collects digital intermediate frequency signals through step S1, obtains target vector signals through step S2, obtains processed baseband signals through step S3, carries out offset adjustment through step S4, carries out frequency adjustment through step S5, carries out window adjustment through step S6, carries out bandwidth adjustment and window updating through step S7, carries out priority decision through step S8 and carries out digital fluorescent display through step S9; the application eliminates the carrying bottleneck through real-time processing of a full FPGA link, and improves the transient capture rate and the measurement stability.