149 results about "Arbitrary waveform generator" patented technology

The invention provides an arbitrary waveform generator multi-chip DAC synchronization system, a delay adjustment module comprises an FPGA chip, an integrated clock management chip and a plurality of DAC chips, and the FPGA chip provides digital signals needing to be converted into analog waveforms for the DAC chips and sends parameter configuration signals to the integrated clock management chip and the DAC chips; the integrated clock management chip generates a reference clock, generates a sampling clock based on the reference clock, distributes the sampling clock to the DAC chip and the FPGA chip, and distributes a synchronization signal to the DAC chip; the multiple DAC chips are all configured to be slave chips to form multiple paths of arbitrary waveform generator output channels, digital signals are synchronously converted into analog signals, the analog signals are processed by a conditioning circuit and then output, the circuit structure of the system is remarkably simplified, synchronization of the multiple DAC chips can be achieved only through one integrated clock management chip, and the system is simple in structure, convenient to use and high in practicability. In addition, delay adjustment between DAC chips can be flexibly achieved, calibration or alignment of circuits and devices is not needed, and good application effects are achieved.

The invention discloses a microwave reflectometer system. An arbitrary waveform generator generates a microwave signal through an X-Ku signal source unit; the coaxial directional coupler divides the generated microwave signal into two paths, one path enters the transmitting unit, and the other path enters the reference unit; a microwave signal entering the transmitting unit is transmitted into the plasma through a fundamental mode rectangular waveguide in the transmitting circuit; the microwave signal entering the reference unit is subjected to flight time compensation through a delay line and then is mixed with a reflected signal received by the receiving unit in a balanced mixer; the calibration unit carries out secondary frequency mixing on the dispersion calibration voltage-time curve signal and the signal obtained after primary frequency mixing of the balanced frequency mixer so as to eliminate dispersion interference; the acquisition card acquires an output signal after secondary frequency mixing of the calibration unit. The system can be integrated with an ion cyclotron resonance antenna, the inherent defects of large attenuation and high dispersion of a long-distance fundamental mode waveguide are overcome, and a high-frequency fundamental mode waveguide through-wall scheme meeting ultrahigh vacuum performance index requirements is realized.

The invention relates to the technical field of photoelectronics, and discloses a chirp parameter measuring device and method based on a directly modulated laser optical module, and the device comprises an arbitrary waveform generator, an optical module, a tunable dispersion compensation module, and an oscilloscope. The optical module comprises a directly modulated laser; the output of the arbitrary waveform generator is electrically connected with the radio frequency input port of the directly modulated laser; the output optical signal end of the directly modulated laser is connected with the input optical end of the adjustable dispersion compensation module; the adjustable dispersion compensation module is used for controlling dynamic switching between a zero dispersion state and a preset non-zero dispersion state by introducing dispersion into a link, and an output optical signal port of the adjustable dispersion compensation module is optically connected with a receiving port of the optical module; and the radio frequency output end of the optical module is electrically connected with the oscilloscope. According to the invention, the problems of long chirp parameter test time and high measurement cost in the prior art are solved, and the chirp parameter measurement method has the characteristic of being capable of realizing rapid and accurate chirp parameter measurement.

The utility model discloses a distributed sound wave sensing system for multi-frequency pulse modulation, and relates to the technical field of distributed sound wave sensing. The system comprises a narrow linewidth laser, an optical fiber coupler, a polarization-maintaining optical isolator, an acousto-optic modulator, a polarization-maintaining delay optical fiber, an erbium-doped optical fiber amplifier, a polarization-maintaining dense wavelength division multiplexer, an optical fiber circulator, an optical fiber Bragg grating, a piezoelectric transducer, a polarization controller, a photoelectric balance detector, a data acquisition card, an arbitrary waveform generator and the like. According to the utility model, the multi-frequency delay ring is utilized to carry out multi-frequency modulation, the frequency number of light waves is increased along with the circulation times of the light waves in the delay ring, and under the condition that the utilization of a large-bandwidth electro-optical modulator is not increased, the flexible modulation of the frequency is realized by utilizing a low-bandwidth acousto-optical modulator without being influenced by carrier frequency and sidebands of each order; the low-bandwidth acousto-optic modulator is used for frequency modulation in the multi-frequency delay ring, and compared with an electro-optical modulation or multi-acousto-optic / multi-light source modulation scheme, the modulation cost is effectively saved.

The invention relates to the technical field of integrated circuit testing, and discloses a method and equipment for scanning a voltage and current flip point of a chip, and the method comprises the following steps: an upper computer completes parameter configuration and wave table loading and then sends a starting instruction, a global synchronization unit generates a synchronization signal, and the synchronization signal is sent to a chip; the random waveform generator is started in parallel for scanning, the trigger unit is started for monitoring, the internal counter is started for timing, when the trigger unit monitors overturning, a stop signal is sent, the global synchronization unit latches a count value immediately, and finally, the upper computer reads the count value and calculates an overturning point value in combination with a wave table rate and a clock period. According to the invention, the global synchronization unit is used for coordinating the parallel hardware architecture of the arbitrary waveform generator and the trigger unit, so that the continuous scanning of the excitation signal and the real-time monitoring of the response signal can be autonomously operated on the hardware level, and the overall time consumption of a single flip point test is greatly shortened.

The invention provides a device capable of quickly and flexibly regulating and controlling the central wavelength of an ultrashort light pulse, which relates to the technical field of optics and consists of a mode-locked laser, a Mach-Zehnder interferometer based on phase modulation, an arbitrary waveform generator and a polarization dependent isolator. The mode-locked laser is used for providing a stable single pulse; the Mach-Zehnder interferometer based on phase modulation is used for regulating and controlling the relative phase between pulses; the arbitrary waveform generator is used for providing an electric signal for modulation; and the polarization dependent isolator is used for enabling the polarization states of the two pulses to be consistent. According to the invention, the efficiency and flexibility of adjusting the central wavelength of the spectrum can be improved.

The utility model relates to a signal generation device, an analog-digital hybrid test board card and a test machine, a read-write control module reads an original waveform from a storage device according to a received read request instruction, and returns the read original waveform to an arbitrary waveform generator; the arbitrary waveform generator receives the original waveform and outputs a reconstructed waveform matched with the frequency of a sampling clock of the digital-to-analog conversion device to the first communication module. And the second communication module is connected with the first communication module, and the reconstructed waveform is received by the second communication module and then is transmitted to the digital-to-analog conversion device. According to the technical scheme, the reconstructed waveform can be generated by resampling the original waveform, the external clock chip outputs the sampling clock with the fixed frequency to the digital-to-analog conversion device, digital-to-analog conversion can be completed, the external clock chip does not need to adjust the frequency of the sampling clock, the hardware requirement for the external clock chip and the digital-to-analog conversion device is low, and the design cost is reduced.

The invention belongs to the technical field of intelligent sensors, and particularly relates to a high-precision area array 4D imaging optical method and system based on coherent detection. The method specifically comprises the following steps of: generating a step frequency signal by using an arbitrary waveform generator, loading the step frequency signal on an electro-optical modulator, and modulating a light beam output by a laser; the modulated laser is divided into reflected light and reference light, and the reflected light is reflected by an object to be detected and then enters the area array optical imaging device together with the reference light; the area array optical imaging device comprises a space bridge and a CCD (Charge Coupled Device) photosensitive area, the space bridge splits incident light into four paths through beam splitting control, and the space bridge regulates and controls the polarization state of the incident light, so that a phase difference exists between reference light and reflected light in each path of light beam; coherent processing is carried out on multiple frames of voltage data in each pixel, and the linear frequency modulation rate is calculated; and calculating the speed and position of each pixel target based on the linear frequency modulation rate to realize 4D high-precision imaging of the target.

The long-distance frequency-broadening distributed optical fiber sensing system comprises a narrow linewidth laser, an optical fiber isolator, a dense wavelength division multiplexer, an optical fiber coupler, a continuous optical amplifier, a narrow-band filter, an acoustic optical modulator, an optical fiber circulator, a balance detector, an acquisition card and an upper computer, a segment of mode division multiplexing pulse sequence is obtained by selecting a narrow linewidth laser and controlling an arbitrary waveform generator. After the pulse sequence enters the to-be-measured optical fiber, a section of Rayleigh backscattered light is returned, and system original data is obtained after frequency beating with local light. And then signals are demodulated by using a compensation method, and undesired signals are suppressed successively, so that the problem of limited spurious-free dynamic range caused by phase mismatching of different modes is solved.

A system comprises a digitally programmable frequency chirp generator configured to generate a frequency chirp, an attenuator coupled to the digitally programmable frequency chirp generator and a directional device integrated into a cryogenic circuit configured to control superconducting qubits and coupled to the digitally programmable frequency chirp generator. The directional device comprises a main arbitrary waveform generator and an on-chip programmable self-interference canceller.

The invention discloses an optical time domain reflectometer based on ring structure modulation and a working method thereof, and relates to the technical field of optics. The optical time domain reflectometer comprises a laser, an optical fiber coupler, a semiconductor optical amplifier, an acoustic optical modulator, an optical isolator, a delay optical fiber, an erbium-doped optical fiber amplifier, a dense wavelength division multiplexer, a circulator, a Raman laser, piezoelectric ceramics, an arbitrary function generator, an arbitrary waveform generator, a polarization controller, a photoelectric balance detector, a data acquisition card, a computer and the like. Multi-frequency modulation is carried out based on an annular structure, the multi-frequency modulation range is only limited by the bandwidth of a detector and the sampling rate of an acquisition card, a pulse sequence is generated through modulation of the optical annular structure, dependence on the bandwidth performance of a microwave signal source and a modulator is reduced, and the bandwidth is improved; and by injecting the Raman light, the sensing distance is also increased, the equipment cost is effectively controlled, and meanwhile, a new scheme is provided for time sequence pulse sequence modulation.

A technique for calibrating signal currents in a radio frequency signal generator system, such as an arbitrary waveform generator system, is provided. The device includes a current measurement circuit and a current imbalance correction circuit. The current measurement circuit is configured to measure a first current in a first signal path of a radio frequency signal generator and a second current in a second signal path of the radio frequency signal generator during a calibration process. The current imbalance correction circuit is configured to adjust a current level in at least one of the first signal path and the second signal path of the radio frequency signal generator to compensate for an imbalance between the measured first current and the measured second current.

The invention relates to the technical field of satellite communication, and discloses a multiband local oscillator signal generation system and method, and the system comprises a laser, an optical splitter, a first optical modulator, a second optical modulator, an arbitrary waveform generator, an optical coupler, and a signal generation module. The optical splitter divides an optical carrier generated by the laser into first carrier light and second carrier light; the arbitrary waveform generator converts the digital signal into a digital baseband signal to be modulated; the first optical modulator modulates the first baseband signal to the first carrier light to obtain a first optical frequency comb; a second optical modulator modulates a second baseband signal to second carrier light to obtain a second optical frequency comb; the optical coupler couples the first optical frequency comb and the second optical frequency comb into a laser signal; the signal generation module converts the laser signal into a local oscillator millimeter wave signal. Dual-coherent optical frequency combs with different comb tooth intervals are generated through modulation of digital signals with different bit rates, tuning of local oscillation signals is achieved, and the requirement for multi-frequency local oscillation is met.

The invention discloses a polarization adjusting device and a polarization adjusting method. The polarization adjusting device comprises a light source assembly, a micro-ring resonant cavity, a photoelectric detector, a digital oscilloscope, an arbitrary waveform generator and a power meter module. The light source assembly comprises a light source, a scanning module and a polarization controller connected with the transmission end of the light source. The micro-ring resonant cavity comprises a first output part and a coupling part coupled with the polarization controller. The photoelectric detector is connected with the first output part. The digital oscilloscope comprises a first input part and a second input part used for receiving an electric signal output by the photoelectric detector, and the digital oscilloscope can display the trough of the Lorentz curve. The arbitrary waveform generator includes a second output portion and a third output portion. The second output part is connected with the light source. The third output part is connected with the first input part. The power meter module is connected with the scanning module. According to the polarization adjusting device and the polarization adjusting method, the light source assembly can be quickly and efficiently adjusted to be in the TE polarization state or the TM polarization state.

The invention provides a waveform agility high-power microwave generation system based on time reversal and a working method. The system comprises a computer, an arbitrary waveform generator, a first broadband power amplifier, m second broadband power amplifiers, a first time reversal pulse compression cavity, m second time reversal pulse compression cavities, a power divider, a high-speed sampling oscilloscope, m phase shifters, m directional couplers and m radiation antennas. The computer is connected with the arbitrary waveform generator, the high-speed sampling oscilloscope, the phase shifter and the directional coupler; the arbitrary waveform generator is connected with the high-speed sampling oscilloscope through the first time reversal pulse compression cavity on one hand, and is connected with an input port of the power divider through the first broadband power amplifier on the other hand. And m output ports of the power divider are sequentially connected with the radiating antenna through the corresponding second broadband power amplifier, the second time reversal pulse compression cavity, the phase shifter, the directional coupler and the radiating antenna. According to the invention, high-universality broadband internal waveform agility high-power microwave pulse generation can be realized.

The application provides a response measuring device for amplitude and phase of a nanoresonator. The response measuring device comprises: an arbitrary waveform generator for generating a first waveform signal and a second waveform signal; a nanoresonator for generating a vibration signal; a first radio frequency power divider for transmitting an equalized first vibration signal to a first signal path and a second vibration signal to a second signal path; a first processing module for multiplying the first vibration signal with the first waveform signal, filtering high frequency components in a first resultant signal, and obtaining an I(t) signal; a second processing module for multiplying the second vibration signal with the second waveform signal, filtering high frequency components in a second resultant signal, and obtaining a Q(t) signal; and a signal acquisition system for determining an amplitude signal and a phase signal of the nanoresonator according to the I(t) signal and the Q(t) signal. The application can replace a vector network analyzer to obtain the amplitude signal and the phase signal of the nanoresonator.

The invention provides a coherent optical time domain reflection sensing device and a method thereof, and relates to the technical field of distributed optical fiber acoustic wave detection. The device comprises a light source, a 1 * 2 coupler, a control and signal processing unit, an arbitrary waveform generator, a double-path parallel Mach-Zehnder electro-optical modulator, a reference arm optical fiber, an erbium-doped optical fiber amplifier, an optical filter, a circulator, a sensing optical fiber, a 90-degree optical mixer, a photoelectric detector and a data acquisition card. A detection light sequence containing positive and negative frequency shift light pulse sequences is injected into a sensing optical fiber, returned signal light which carries light phase information of each detection point and has superposed frequencies is mixed with local reference light, signal separation is achieved after the signal light is multiplied by complex factors corresponding to each frequency shift pulse and integration of a periodic integral multiple window is carried out, and the detection point light phase information is obtained. And optical phase information demodulation is carried out, and then fusion of detection results of optical signals of various frequencies is carried out, so that high-sampling-rate sensing of acoustic vibration is realized.

The application provides a frequency-modulated continuous wave laser radar system and relates to the technical field of laser radar.The frequency-modulated continuous wave laser radar system comprises a laser, an arbitrary waveform generator, an upper computer, a collection card, a lens, a first optical beam splitter, a linearity correction unit and a detection unit.The linearity correction unit comprises a second optical beam splitter, a delay line, a first coupler and a first balanced detector.The detection unit comprises a third optical beam splitter, a coaxial transceiving grating, a second coupler and a second balanced detector.The frequency-modulated continuous wave laser radar system improves the signal-to-noise ratio and the energy efficiency of the edge field of view, uses the coaxial transceiving grating to replace the circulator, eliminates the near-distance detection blind area of the radar system caused by the internal reflection of the circulator, integrates the linearity correction unit, performs real-time correction or monitoring on the frequency modulation of the laser, enhances the stability of the radar system, and does not need to build any additional optical circuit.

The invention provides a TEC controller chip test system and method, the system employs an integrated circuit automatic test machine ATE to test a TEC controller chip, the ATE comprises a voltage or current source, a high precision measurement unit, a power resistor and an arbitrary waveform generator, the voltage or current source is used as a power supply, the high precision measurement unit is used as a test instrument, and the power resistor is used as an arbitrary waveform generator. The power resistor is used for simulating the TEC, and the arbitrary waveform generator is used for simulating the voltage of the thermistor. According to the invention, the technical problems of high cost, low efficiency and low system reliability of the test of the TEC controller chip in the prior art can be solved.

The application provides a device and a method for realizing PON rate adjustment based on Polar modulation, and relates to the technical field of passive optical networks.The device comprises a first external cavity laser, a second external cavity laser, a dual-polarization phase quadrature modulator, an arbitrary waveform generator, an erbium-doped fiber amplifier, a single-mode optical fiber, a variable optical attenuator, a coherent receiver and an oscilloscope.The method comprises the following steps: dynamically adjusting the number of information bits A, splicing check bits to form total information bits, optimizing the distribution of information bits and frozen bits according to the optical signal channel sorting result, performing polar encoding on the signal at the encoding end, and mapping the signal into a 16QAM code symbol sequence by using the Polar modulation technology; at the receiving end, calculating the LLR, calculating the path metric value of all paths and performing a pruning operation when the list width reaches a set value, and detecting the L candidate paths by using the CRC check after the decoding is completed.The application realizes flexible regulation and control of the transmission rate of different optical network units.

The application discloses an optical frequency comb automatic recovery device and method, and belongs to the field of silicon-based nonlinear optical photoelectric modulation. The application comprises a laser, an IQ modulator, an acousto-optic modulator, a fiber amplifier, a polarization controller, a micro-ring resonator, a phase-locked loop, an arbitrary waveform generator, a photoelectric detector, a PID module and an upper computer. Transmission loss of an optical frequency comb debugging system is tested, which comprises fiber loss before laser enters a microcavity and transmission loss after the laser enters the microcavity; the output frequency range of the phase-locked loop is adjusted, and frequency scanning is performed on the microcavity; laser wavelength is entered from blue detuning, the output power of the laser is gradually reduced through the acousto-optic modulator, and the wavelength is kept unchanged; when the PID detects a power rise, the laser power is quickly raised until the PID detects a rising step; the laser frequency is slowly increased and the power is kept unchanged until a single soliton optical frequency comb is observed; when the single soliton disappears, the control steps after the laser wavelength is entered from blue detuning are repeated, and the optical frequency comb is automatically recovered.

The invention discloses a precise deception jamming signal photonics generation method for a synthetic aperture radar (SAR), and relates to the field of optical communication, microwave technology and electronic countermeasure. According to the method, a laser device LD, a dual-polarization quadrature phase shift keying modulator DP-QPSK, a bridge, an arbitrary waveform generator AWG, an optical band pass filter OBPF, an erbium-doped fiber amplifier EDFA, a polarization controller PC, a polarizer Pol and a photoelectric detector PD are included. According to the invention, high-fidelity false target deception can be realized by using only one DP-QPSK modulator, a template signal generation method directly used for a microwave photon frequency conversion system is designed, complex signal processing is not needed, SAR deception jamming signals can be generated through one photon mixing, the signal processing complexity is reduced, and the signal processing efficiency is improved. The method is simple in structure, good in real-time performance and high in parameter reconfigurable capability, a false target image is highly similar to a real target, effective cheating can be achieved, the method conforms to the future development trend of an electronic countermeasure system, and the method has application value in the fields of future radar electronic warfare and the like.

The present invention discloses a secure communication method and system based on chaotic prediction and interleaving coding in a reserve pool. The chaotic encryption module includes a light source output by a first continuous wave laser (CW), which is modulated by a parallel quadrature modulator (IQM) to convert the signal output by an arbitrary waveform generator (AWG) for transmission. The signal is pseudo-randomly interleaved and encoded. The transmitted signal is loaded onto a chaotic carrier through a first optical coupler (FC) to achieve chaotic hiding. The chaotic optical carrier is then transmitted through an information transmission module. The chaotic optical carrier is predicted in advance by the reserve pool in the chaotic decryption module and modulated onto the continuous optical carrier output by a second continuous wave laser (CW) through a Mach-Zehnder modulator (MZM). The signal is then decrypted by a 90° mixer to initially restore the original transmitted signal. Finally, the resulting signal is processed by a local oscillator (LO) and a coherent receiver, and digital information processing (DSP) is performed to compensate, recover, and decrypt the digital signal, thereby realizing chaotic secure coherent optical communication.

This application provides an output amplifier circuit and an arbitrary waveform generator, belonging to the field of electronic circuit technology. The output amplifier circuit includes: a radio frequency amplifier circuit, including a first common-emitter amplifier sub-circuit and a second common-emitter amplifier sub-circuit, for amplifying high-frequency signals in the AC input signal from the input node; the second common-emitter amplifier sub-circuit includes a second transistor, the collector of which is connected to the output node through a current-sampling resistor; an output bias voltage circuit for superimposing an output bias voltage onto the output node; a static bias voltage circuit for providing a static bias voltage to the second transistor and outputting a reference voltage to the integrator circuit; a feedback amplifier circuit for outputting a feedback signal based on the static operating current of the second transistor; and an integrator circuit for outputting an integrated signal based on the reference voltage and the feedback signal. This output amplifier circuit can solve the problems of small output bias voltage range and performance degradation in ultra-high bandwidth AWGs.

The invention belongs to the technical field of optics, and particularly relates to an unequal-interval frequency comb generation and detection device and method based on a single side band modulator. In order to improve phase coherence between comb teeth, an arbitrary waveform generator generates a modulation signal, the modulation signal is amplified by a power amplifier and then input into a single-side-band phase modulator, a laser is connected with an optical signal input end of the single-side-band phase modulator, and an output end of the single-side-band phase modulator is connected with an optical beam splitter. The light beam splitter divides light into two paths, one path serves as reference light to enter the first detector, the first detector converts the reference light into an electric signal and then carries out FFT observation, the other path serves as detection light, is absorbed by the gas chamber and then is input into the second detector, and the second detector converts the detection light into an electric signal and then carries out FFT observation.

This invention relates to a machine learning-based modeling method for cloud wireless access networks, comprising: acquiring a remote cloud wireless access network transmitter; improving the remote cloud wireless access network transmitter by replacing the traditional microwave source with a dual-ring opto-oscillator to suppress side modes through single-mode oscillation; and introducing a directly modulated laser after an arbitrary waveform generator to utilize the chirp effect and fiber dispersion to generate power gain; and modeling the millimeter-wave signal spectrum of the improved remote cloud wireless access network transmitter based on a lightweight gradient booster model to match the dimensions of input and output features. This invention uses a dual-ring opto-oscillator to replace the traditional microwave source, reducing phase noise; utilizes the synergistic gain behavior of the directly modulated laser chirp and fiber dispersion to improve the transmission gain of the millimeter-wave signal; and models the spectral characteristics of the millimeter-wave signal using a lightweight gradient booster model to achieve spectrum prediction.

The invention discloses a magnetic ring saturation characteristic measurement method and device, and the method comprises the steps: building a measurement circuit which comprises an arbitrary waveform generator, a power amplifier, a measured magnetic ring and a matched load based on the reference data of an impedance analyzer, and setting a voltage sensor, a current sensor and a thermocouple to obtain the voltage, current and temperature data of the measured magnetic ring; impedance and inductance data are obtained through calculation and serve as actual measurement data; comparing the measured data with the reference data, defining the ratio of the inductance data attenuation of the measured magnetic ring to the inductance data measured by the impedance analyzer as the saturation rate of the magnetic ring, and recording the signal type, frequency, amplitude and temperature rise corresponding to the magnetic ring at the moment; by fixing the signal type and the frequency and adjusting the signal amplitude, the saturation characteristic of the measured magnetic ring along with the amplitude change under the signal type and the current frequency is obtained; whether the magnetic ring is saturated or not and the saturation degree can be judged, and whether the magnetic ring is available or not is judged by measuring the temperature rise after the magnetic ring is saturated.

This invention discloses a radio frequency arbitrary waveform generator, generation method, related systems, and devices. The generator includes: a frequency processing unit that processes a frequency parameter sequence to obtain cumulative phase data; a phase processing unit that processes a phase parameter sequence to obtain effective phase data; an amplitude processing unit that processes an amplitude parameter sequence to obtain effective amplitude data; a local oscillator processing unit that processes a local oscillator parameter sequence to obtain a local oscillator signal; an arithmetic unit that performs calculations on the cumulative phase data and effective phase data to obtain input angle data, and obtains sine and cosine data through calculation or table lookup; an I-unit and a Q-unit that generate I-channel signals and Q-channel signals respectively based on the amplitude data and sine and cosine data; and a mixing unit that performs IQ mixing on the I-channel signals, Q-channel signals, and local oscillator signal to generate an IQ mixed transmit signal. It can generate radio frequency signals with arbitrarily controllable and adjustable spectrum, phase, and amplitude, with high control precision.

The invention provides a photoelectric oscillator capable of being used for generating tunable phase coding microwave pulses. The photoelectric oscillator is composed of a tunable laser, a polarization controller, a phase modulator, a dual-drive Mach-Zehnder modulator, an optical circulator, a phase shift fiber bragg grating, a single-mode fiber, a photoelectric detector, an electric amplifier, a microwave source and an arbitrary waveform generator. The invention develops the active mode-locked photoelectric oscillator for generating the phase-coded microwave pulse signal, which is simple in structure and good in tunability. On the basis of an active mode-locked optoelectronic oscillator, a phase modulator is driven by a phase coding signal, so that the duration of each voltage polar code is kept consistent with the loop delay of the optoelectronic oscillator, and a phase-coded coherent microwave pulse sequence is generated. The signal has the advantage of large time bandwidth product, can give consideration to the detection distance and distance resolution of the radar, and has the characteristics of interference resistance, low interception and the like.

A signal generation device and method, an analog-digital hybrid test board, and a test machine. The signal generation device comprises: an arbitrary waveform generator, a read / write control module, an external clock chip, and a storage device; the external clock chip is configured to output a fixed-frequency sampling clock to a digital-to-analog conversion device; the read / write control module is connected to the arbitrary waveform generator and the storage device, and is configured to read an original waveform from the storage device on the basis of a received read request instruction, and return the read original waveform to the arbitrary waveform generator; and the arbitrary waveform generator is configured to perform resampling processing on the received original waveform to generate a reconstructed waveform matching the frequency of the sampling clock, wherein the reconstructed waveform is used by the digital-to-analog conversion device to perform digital-to-analog conversion on the basis of the sampling clock outputted by the external clock chip.