CN102497237B - Radio frequency and microwave synthetic instrument based on PXIe (PCI Extensions for Instrumentation) synthetic instrument architecture - Google Patents

Abstract

The invention discloses a radio frequency and microwave synthetic instrument based on a PXIe (PCI Extensions for Instrumentation) synthetic instrument architecture. A control platform accesses to a PXIe bus through a PXIe system controller; a digitizer module, a signal generator module, a down-conversion module, a down-conversion local oscillator, an up-conversion module and an up-conversion local oscillator all access to the PXIe bus; signal line direct channels are respectively arranged between a synthetic instrument hardware interface and the digitizer module and between the synthetic instrument hardware interface and the signal generator module; the down-conversion module is connected with the down-conversion local oscillator and the digitizer module, and the up-conversion module is connected with the up-conversion local oscillator and the signal generator module; the down-conversion module and the up-conversion module are connected with the synthetic instrument hardware interface; and the control platform can enable the synthetic instrument to have different functions through configurations. The synthetic instrument provided by the invention can be used for realizing the miniaturization of a communication/radar electronic equipment test system by sharing a processing module and can meet the requirements of a new generation of automatic test systems.

Description

An Integrated RF and Microwave Instrument Based on PXIe Synthetic Instrument Architecture

technical field

The invention relates to the technical field of radio frequency/microwave instruments, in particular to a radio frequency and microwave comprehensive instrument based on a PXIe synthetic instrument architecture.

Background technique

The biggest problem in today's automatic test system is not to absorb advanced technology in the newly equipped automatic test system to achieve higher test performance, but to manage the life cycle of existing and new automatic test systems for more than 20 years or longer question.

Renewal and management of weapon systems prolongs the lifetime of weapon systems, which may be 20 years or more, requiring automated test systems that can also sustain them over such a long period of time. Costs for ongoing obsolescence management issues for weapons systems are relatively assured, but it is much more difficult to provide significant costs for existing test systems. Therefore, future automated test system obsolescence management must be addressed now in order to prevent the same problems in the future.

At present, domestic automatic test systems and foreign early automatic test systems use a large number of specially designed circuits to complete the test support work of weapon systems. Difficult and costly to maintain.

At present, synthetic instruments are a better technical solution. The development of synthetic instruments is a supplement to traditional single instruments. People can choose different components of synthetic instruments to meet the performance requirements of the required instruments, so as to avoid obsolete equipment technology. question. Since the signal generation and signal processing of the synthetic instrument are completed through software programs that have nothing to do with the hardware platform, the performance of the instrument can be changed or expanded by downloading new programs or updating drivers. Adoption of common programming standards such as IVI allows for an easy transition to alternative hardware and software when technology obsolescence issues arise. With the rapid development of personal computers, data processing capabilities have increased and costs have decreased. A/D and D/A converters have also been commercialized, and conversion speeds and resolutions have increased year by year. All of these provide strong technical support for synthetic instruments.

PXIe is a new generation of test bus with smaller size and higher performance. Therefore, the synthetic instrument with PXIe architecture can solve the problem of communication/radar electronic equipment test system miniaturization, and also has lower cost and higher mobility. performance.

Contents of the invention

In view of this, the present invention provides a radio frequency/microwave integrated instrument based on the PXIe integrated instrument architecture, which solves the miniaturization of the communication/radar electronic equipment test system by sharing the processing module, and meets the requirements of the new generation of automatic test systems.

In order to achieve the above purpose, the program is implemented as follows:

A radio frequency and microwave integrated instrument based on the PXIe synthetic instrument architecture, the integrated instrument includes a control platform, a PXIe system controller, a digitizer module, a signal generator module, a down-conversion module, a down-conversion local oscillator, an up-conversion module, and an up-conversion module Local oscillator and synthetic instrument hardware interface;

The control platform is connected to the PXIe bus through the PXIe system controller. The digitizer module, signal generator module, down-conversion module, down-conversion local oscillator, up-conversion module and up-conversion local oscillator are all connected to the PXIe bus. There is a direct signal line channel between the instrument module and the hardware interface of the synthesized instrument and the signal generator module; the down-conversion module is connected to the down-conversion local oscillator and the digitizer module, and the up-conversion module is connected to the up-conversion local oscillator and the signal generator module; the down-conversion module Connect with the up-conversion module to the hardware interface of the synthesized instrument;

The PXIe system controller is used to compile the information of the control platform into data conforming to the PXIe bus protocol for transmission on the PXIe bus, analyze the data obtained from the PXIe bus and send it to the control platform;

The signal generator module is selected as an arbitrary waveform generator or a baseband signal generator; the signal generator module includes two signal generation channels. When it is used as an arbitrary wave generator, any signal generation channel is used. The waveform signal generated by the configuration information is output to the hardware interface of the synthesis instrument through the signal line through channel; when used as a baseband generator, according to the configuration information from the PXIe bus, the two signal generation channels generate orthogonal IQ two-way signals as the baseband signal output to Up-conversion module;

The up-conversion module is used to up-convert the baseband signal from the signal generator module, and then transmit it through the hardware interface of the synthesized instrument;

The up-conversion local oscillator is used to provide the local oscillator signal for the up-conversion module;

The down-conversion module is used for down-converting the radio frequency signal from the hardware interface of the synthesis instrument, and then sending the obtained intermediate frequency signal to the digitizer module;

The down-conversion local oscillator is used to provide the local oscillator signal for the down-conversion module;

The digitizer module is selected as a time domain digitizer or an intermediate frequency digitizer, and the digitizer module processes the received frequency signal according to the selected function according to the configuration information from the PXIe bus, and then sends it to the control platform;

The control platform is used to configure each module according to the functions of the comprehensive instrument selected externally:

When the time-domain digitizer function is selected: the control platform configures the digitizer module through the PXIe bus to receive the low-frequency signal directly from the hardware interface of the synthesized instrument through the signal line through channel, and the digitizer module processes the low-frequency signal, and then sends the processing result to the control platform;

When the IF digitizer function is selected: the control platform starts and configures the down-conversion local oscillator and down-conversion module through the PXIe bus, configures the digitizer module to receive the IF signal directly from the down-conversion module, processes the IF signal, and then processes the IF signal through the PXIe bus. The results are sent to the control platform;

When the arbitrary waveform generator function is selected: the control platform starts the signal generator module to switch to the arbitrary waveform generator function through the PXIe bus, and sends the generated waveform to the hardware interface of the synthesized instrument through the signal line through channel;

When the RF signal source function is selected: the control platform starts the signal generator module to switch to the baseband signal generator function through the PXIe bus, and starts and configures the up-conversion module and the up-conversion local oscillator module. The baseband signal generator will generate two IQ The two signals are sent to the up-conversion module.

Wherein, the intermediate frequency digitizer function includes a radio frequency spectrum analyzer function; the control platform is further used for:

When the digitizer module is selected to be in the radio frequency spectrum analyzer function, the control platform starts the down-conversion local oscillator and the down-conversion module to work through the PXIe bus, and configures the local oscillator frequency of the down-conversion local oscillator to change cyclically within a range, thereby realizing scanning frequency function; the down-conversion module has multiple intermediate frequency IFs, and each IF corresponds to a bandwidth. The control platform configures the IF of the down-conversion module so that the signal output to the digitizer module is within the required bandwidth; the control platform configures digitization through the PXIe bus The instrument module directly receives the intermediate frequency signal from the down conversion module, and the digitizer module collects and stores the intermediate frequency signal, and then sends the stored waveform data to the control platform through the PXIe bus, and the control platform completes the spectrum analysis process;

Wherein, the intermediate frequency digitizer function includes a vector signal analyzer function; the control platform is further used for:

When the selected digitizer module is in the vector signal analyzer function, the control platform starts the down-conversion local oscillator and the down-conversion module to work through the PXIe bus, and configures the local oscillator frequency of the down-conversion local oscillator to be fixed at the preset point frequency. The IF of the down-conversion module makes the signal output to the digitizer module within the required bandwidth; the control platform configures the digitizer module to directly receive the intermediate frequency signal from the down-conversion module, and the digitizer module carries out digital down-conversion to the intermediate frequency signal to obtain I, The Q component is sent to the control platform through the PXIe bus, and the control platform completes the vector signal analysis function.

Preferably, the digitizer module includes an input port of an intermediate frequency digitizer, an input port of a time domain digitizer, a port selection circuit, a signal conditioning circuit, an A/D conversion circuit, and a digital processing unit; the digital processing unit includes an intermediate frequency digitizer digital Signal processing channel, time domain digitizer digital signal processing channel and PXIe bus interface;

a) When the digitizer module is in the time domain digitizer function:

The port selection circuit selects the input port of the time-domain digitizer according to the configuration information from the PXIe bus to receive the signal from the hardware interface of the synthesis instrument, and the received signal is sent to the digital signal processing channel of the time-domain digitizer after passing through the signal conditioning circuit and the A/D conversion circuit ; The digital signal processing channel of the time-domain digitizer realizes trigger detection, data storage and waveform parameter estimation processing, and the processing results are sent to the control platform through the PXIe bus interface;

b) When the digitizer module is in the IF digitizer function:

The port selection circuit selects the input port of the intermediate frequency digitizer according to the configuration information from the PXIe bus to receive the signal from the down conversion module, and the received signal is sent to the digital signal processing channel of the intermediate frequency digitizer after passing through the signal conditioning circuit and the A/D conversion circuit; the intermediate frequency digitization The digital signal processing channel of the instrument realizes digital down-conversion and data storage, and the processing results are sent to the control platform through the PXIe bus interface.

Preferably, the signal generator module includes an arbitrary waveform generator port, a baseband signal generator I port, a baseband signal generator Q port, a PXIe bus interface, a waveform engine, a storage management module, a memory chip, a baseband signal processing engine, a dual Channel D/A converter, signal conditioning circuit A and signal conditioning circuit B;

c) When the signal generator module is in the arbitrary waveform generator function:

The PXIe bus interface downloads the waveform data configured by the control platform to the storage chip through the storage management module; after starting to work, the waveform engine obtains the waveform data from the storage chip through the storage management module, and directly sends it to the dual-channel D/A converter One of the channels is output after digital-to-analog conversion, and the signal conditioning circuit A performs amplitude adjustment and offset operations on the output of the dual-channel D/A converter according to the configured waveform parameters, and finally the analog waveform signal is directly passed through the port of the arbitrary waveform generator. Output to synthesized instrument hardware interface;

d) When the signal generator module is in the baseband signal generator function:

The PXIe bus interface downloads the waveform data configured by the control platform to the storage chip through the storage management module; after starting work, the waveform engine obtains the waveform data from the storage chip through the storage management module, and sends it to the baseband signal processing engine for interpolation and digitization. Filter processing to obtain two digital signals of I and Q, which are respectively sent to the two channels of the dual-channel D/A converter for digital-to-analog conversion, and the two signal conditioning circuits are based on the configured waveform parameters. The two-way signals output by the channel D/A converter are subjected to amplitude adjustment and bias operation, and finally the I and Q two-way analog signals are sent to the up-conversion module through the I port and Q port of the baseband signal generator.

Beneficial effect:

Based on the PXIe architecture, the present invention designs a comprehensive instrument that combines a signal source and an analyzer. The control platform configures the instrument to work under a certain function through the PXIe bus. The invention adopts a shared processing module to solve the miniaturization problem of the communication/radar electronic equipment testing system. Through the PXIe bus, the control platform can also upgrade the functions of the digitizer module and the signal generator module, thus meeting the needs of the replacement of the test system. The invention also provides an implementation example of the digitizer module and the signal generator module, which share the same functional modules as much as possible, which is beneficial to the miniaturization of the equipment.

Description of drawings

FIG. 1 is a schematic structural diagram of a radio frequency/microwave integrated instrument based on a PXIe integrated instrument architecture according to the present invention.

FIG. 2 is a schematic diagram of the specific structure of the digitizer module in FIG. 1 .

FIG. 3 is a schematic structural diagram of the signal generator module in FIG. 1 .

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

The embodiment of the present invention provides a radio frequency/microwave integrated instrument based on the PXIe synthetic instrument architecture, as shown in Figure 1, the integrated instrument includes a control platform, a PXIe system controller, a digitizer module, a signal generator module, and a frequency down conversion module , down-conversion local oscillator, up-conversion module, up-conversion local oscillator and synthesis instrument hardware interface. The above components can be arranged in a PXIe chassis, and the PXIe system controller can be a PXIe embedded system controller or a PXIe plug-in system controller. Moreover, PXIe chassis and PXIe system controllers can be standard off-the-shelf products.

The connection relationship of the above modules is as follows: the control platform is connected to the PXIe bus through the PXIe system controller, the digitizer module, the signal generator module, the down-conversion module, the down-conversion local oscillator, the up-conversion module and the up-conversion local oscillator are all connected to the PXIe There is a direct signal line channel between the hardware interface of the synthetic instrument and the digitizer module, and the hardware interface of the synthetic instrument and the signal generator module; the down-conversion module is connected to the down-conversion local oscillator and the digitizer module, and the up-conversion module is connected to the up-conversion local The signal generator module; the down-conversion module and the up-conversion module are connected to the hardware interface of the synthesis instrument; the hardware interface of the synthesis instrument transmits signals to the external measured object or receives signals from the outside.

The signal generator module, up-conversion local oscillator, and up-conversion module constitute the RF/microwave signal source, which can generate arbitrary waveforms or baseband signals set by users. The digitizer module, the down-conversion local oscillator, and the down-conversion module constitute a radio frequency/microwave analysis instrument, which can be used as a common radio frequency/microwave instrument such as a spectrum analyzer and a vector signal analyzer. The control platform gates the corresponding modules through the PXIe bus, so as to realize one of the functions of the comprehensive instrument.

The functions of each component are described in detail below.

The PXIe system controller is used to compile the information of the control platform into data conforming to the PXIe bus protocol for transmission on the PXIe bus, analyze the data obtained from the PXIe bus and send it to the control platform.

The signal generator module can be selected as an arbitrary waveform generator or a baseband signal generator. The signal generator module includes two signal generation channels. When used as an arbitrary wave generator, any signal generation channel is used to generate a set waveform according to the configuration information from the PXIe bus and output it to the hardware interface of the synthesis instrument through the signal line through channel; When used as a baseband generator, according to the configuration information from the PXIe bus, the two signal generation channels generate orthogonal IQ two-way signals as baseband signals and output them to the up-conversion module. The firmware of the signal generator module can be updated through the PXIe bus for easy upgrade.

The up-conversion module is used for up-converting the baseband signal from the signal generator module, and then transmitting it through the hardware interface of the synthesis instrument.

The up-conversion local oscillator is used to provide a local oscillator signal for the up-conversion module.

The down-conversion module is used for down-converting the radio frequency signal from the hardware interface of the synthesis instrument, and then sending the obtained intermediate frequency signal to the digitizer module.

The down-converted local oscillator is used to provide a local oscillator signal for the down-converted module.

The digitizer module can be used as a time-domain digitizer, that is, an oscilloscope or an intermediate frequency digitizer with data processing functions. The digitizer module processes the received frequency signal according to the configuration information from the PXIe bus, and then sends it to the control platform . The digitizer module's firmware can be updated via the PXIe bus for easy upgrades.

The control platform is used to configure each module according to the functions of the integrated instrument selected externally:

(1) When the time-domain digitizer function is selected: the control platform configures the digitizer module through the PXIe bus to receive the low-frequency signal directly from the hardware interface of the synthesized instrument through the signal line through channel, and the digitizer module processes the low-frequency signal, and then passes the PXIe bus to process the low-frequency signal Results (stored waveform data and waveform parameters) are sent to the control platform;

(2) When the function of the intermediate frequency digitizer is selected: the control platform starts the down-conversion local oscillator and the down-conversion module to work through the PXIe bus, and the control platform configures the digitizer module through the PXIe bus to directly receive the intermediate frequency signal from the down-conversion module and process the intermediate frequency signal , and then send the processing results to the control platform through the PXIe bus.

The IF digitizer function can also be embodied as a radio frequency spectrum analyzer function, a vector signal analyzer function and other IF digitizer functions. Specifically:

●When the RF spectrum analyzer function is selected:

The control platform starts the down-conversion local oscillator and the down-conversion module to work through the PXIe bus, and configures the local oscillator frequency of the down-conversion local oscillator to change cyclically within a range, thereby realizing the frequency sweep function; the down-conversion module has multiple intermediate frequency IFs, each The IF corresponds to a bandwidth, and the control platform configures the IF of the down-conversion module so that the signal output to the digitizer module is within the required bandwidth; the control platform configures the digitizer module through the PXIe bus to receive the intermediate frequency signal directly from the down-conversion module, and the digitizer module The intermediate frequency signal is collected and stored, and then the stored waveform data and waveform parameters are sent to the control platform through the PXIe bus, and the control platform completes the spectrum analysis process.

●When the vector signal analyzer function is selected:

The control platform starts the down-conversion local oscillator and the down-conversion module to work through the PXIe bus, configures the local oscillator frequency of the down-conversion local oscillator to be fixed at the preset point frequency, and configures the IF of the down-conversion module so that the signal output to the digitizer module Within the required bandwidth; the control platform is equipped with a digitizer module to directly receive the IF signal from the down-conversion module, and the digitizer module performs digital down-conversion on the IF signal, and the obtained I and Q components are sent to the control platform through the PXIe bus, and the control platform completes the vector signal analysis Function.

(3) When the arbitrary waveform generator function is selected: the control platform starts the signal generator module to switch to the arbitrary waveform generator function through the PXIe bus, and sends the generated waveform through the signal line through channel through the hardware interface of the synthesized instrument.

(4) When the RF signal source function is selected: the control platform starts the signal generator module to switch to the baseband signal generator function through the PXIe bus, and starts and configures the up-conversion module and the up-conversion local oscillator module, the baseband signal generator will generate The two-way IQ two-way signals are sent to the up-conversion module.

Preferably, when the processing frequency of the integrated instrument is relatively high, the integrated instrument may further include a first preselector, which is a programmable filter. The first preselector is connected to the down-conversion module and connected to the PXIe bus, and the first pre-selector filters the radio frequency signal input from the hardware interface of the synthesis instrument before the down-conversion module; the control platform configures the first preselector to participate in or not to participate in the radio frequency signal through the PXIe bus Filter processing, and the center frequency in the case of participating in filter processing.

Likewise, the comprehensive instrument may further include a second preselector, which is a programmable filter. The second preselector is connected with the up-conversion module and connected to the PXIe bus, and the second pre-selector filters the radio frequency signal output by the up-conversion module; the control platform configures the second preselector to participate in or not participate in the radio frequency signal filtering process through the PXIe bus, and The center frequency in the case of participating in filtering processing.

It can be seen that, based on the PXIe architecture, the present invention designs a comprehensive instrument that integrates a signal source and an analyzer. The control platform configures the instrument to work under a certain function through the PXIe bus. The invention adopts a shared processing module to solve the miniaturization problem of the communication/radar electronic equipment testing system. Through the PXIe bus, the control platform can also upgrade the functions of the digitizer module and the signal generator module, thus meeting the needs of the replacement of the test system.

FIG. 2 is a schematic diagram of the specific structure of the digitizer module in this embodiment. As shown in Figure 2, the digitizer module has two input ports, which are the input port of the intermediate frequency digitizer and the input port of the time domain digitizer. The input port of the intermediate frequency digitizer is connected to the down conversion module, and the input port of the time domain digitizer is connected to the synthesis instrument hardware interface. The digitizer module also includes a port selection circuit, a signal conditioning circuit, an A/D conversion circuit and a digital processing unit. The digital processing unit includes a digital signal processing channel of an intermediate frequency digitizer, a digital signal processing channel of a time domain digitizer and a PXIe bus interface.

a) When in the time-domain digitizer function, the port selection circuit selects the signal of the input port of the time-domain digitizer according to the configuration information from the PXIe bus, and the received signal is sent to the time-domain digitizer after passing through the signal conditioning circuit and the A/D conversion circuit Digital signal processing channel, the digital signal processing channel of the time-domain digitizer mainly implements trigger detection, data storage and waveform parameter estimation processing, and the processing results are sent to the control platform through the PXIe bus interface.

b) When in the function of the intermediate frequency digitizer, the port selection circuit selects the signal of the input port of the intermediate frequency digitizer according to the configuration information from the PXIe bus, and the received signal is sent to the intermediate frequency digitizer for digital signal processing after passing through the signal conditioning circuit and the A/D conversion circuit Channel, the digital signal processing channel of the intermediate frequency digitizer mainly realizes digital down-conversion and data storage, and the processing results are sent to the control platform through the PXIe bus interface.

As mentioned above, the function of the IF digitizer is specifically divided into the function of the radio frequency spectrum analyzer and the function of the vector signal analyzer. When the radio frequency spectrum analyzer function is selected, the digital signal processing channel of the intermediate frequency digitizer completes the acquisition and storage of the intermediate frequency signal, and then sends the stored waveform data to the control platform through the PXIe bus; when the vector signal analyzer function is selected, the intermediate frequency digitization The digital signal processing channel of the instrument performs digital down-conversion on the intermediate frequency signal, and the obtained I and Q components are sent to the control platform through the PXIe bus.

The digital processing unit can be realized by FPGA chip or FPGA chip+DSP chip.

FIG. 3 is a schematic diagram of the specific structure of the signal generator module in this embodiment. As shown in Figure 3, the signal generator module has three output ports, which are the output port of the arbitrary waveform generator, the I port of the baseband signal generator and the Q port of the baseband signal generator. The signal generator module also includes a PXIe bus interface, a waveform engine, a storage management module, a memory chip, a baseband signal processing engine, a dual-channel D/A converter, a signal conditioning circuit A and a signal conditioning circuit B. The arbitrary waveform generator signal and the baseband signal generator I branch share the same signal conditioning circuit A, and the two signal conditioning circuits A and B are respectively connected to the output ends of the two channels A and B of the dual-channel D/A converter, and the dual-channel The input end of the D/A converter A channel is connected to the signal output port I of the baseband signal processing engine and the waveform engine, and the input end of the B channel of the dual-channel D/A converter is connected to the Q signal output port of the baseband signal processing engine.

c) When in the arbitrary waveform generator function, the PXIe bus interface downloads the waveform data configured by the control platform (here may be normalized waveform data) to the memory chip through the storage management module. After starting to work, the waveform engine obtains the waveform data from the memory chip through the storage management module, and directly sends it to the A channel of the dual-channel D/A converter. The output of the output is adjusted (amplified, attenuated) and biased, and finally the obtained analog waveform signal is sent to the port of the arbitrary waveform generator.

d) When it is in the baseband signal generator function, the PXIe bus interface downloads the waveform data configured by the control platform to the storage chip through the storage management module. After starting to work, the waveform engine obtains the waveform data from the storage chip through the storage management module and sends it Perform interpolation and digital filtering processing for the baseband signal processing engine to obtain two digital signals of I and Q, which are respectively sent to two channels of a dual-channel D/A converter for digital-to-analog conversion. The signal conditioning circuit performs amplitude adjustment (amplification, attenuation) and offset operations on the two signals output by the dual-channel D/A converter according to the configured waveform parameters, and finally sends the I and Q analog signals to the baseband signal generator The I port and Q port.

The structures shown in Fig. 2 and Fig. 3 share modules to the greatest extent, which is beneficial to miniaturization.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (5)

1. A radio frequency and microwave integrated instrument based on PXIe synthetic instrument framework, it is characterized in that, this integrated instrument comprises control platform, PXIe system controller, digitizer module, signal generator module, down-conversion module, down-conversion local oscillator, Up-conversion module, up-conversion local oscillator and synthetic instrument hardware interface; The control platform is connected to the PXIe bus through the PXIe system controller. The digitizer module, signal generator module, down-conversion module, down-conversion local oscillator, up-conversion module and up-conversion local oscillator are all connected to the PXIe bus. There is a direct signal line channel between the instrument module and the hardware interface of the synthesized instrument and the signal generator module; the down-conversion module is connected to the down-conversion local oscillator and the digitizer module, and the up-conversion module is connected to the up-conversion local oscillator and the signal generator module; the down-conversion module Connect with the up-conversion module to the hardware interface of the synthesized instrument; The PXIe system controller is used to compile the information of the control platform into data conforming to the PXIe bus protocol for transmission on the PXIe bus, analyze the data obtained from the PXIe bus and send it to the control platform; The signal generator module is selected as an arbitrary waveform generator or a baseband signal generator; the signal generator module includes two signal generation channels. When it is used as an arbitrary wave generator, any signal generation channel is used. The waveform signal generated by the configuration information is output to the hardware interface of the synthesis instrument through the signal line through channel; when used as a baseband generator, according to the configuration information from the PXIe bus, the two signal generation channels generate orthogonal IQ two-way signals as the baseband signal output to Up-conversion module; The up-conversion module is used to up-convert the baseband signal from the signal generator module, and then transmit it through the hardware interface of the synthesized instrument; The up-conversion local oscillator is used to provide the local oscillator signal for the up-conversion module; The down-conversion module is used to down-convert the radio frequency signal from the hardware interface of the synthetic instrument, and then send the obtained intermediate frequency signal to the digitizer module; The down-conversion local oscillator is used to provide the local oscillator signal for the down-conversion module; The digitizer module is selected as a time domain digitizer or an intermediate frequency digitizer, and the digitizer module processes the received frequency signal according to the selected function according to the configuration information from the PXIe bus, and then sends it to the control platform; The control platform is used to configure each module according to the functions of the integrated instrument selected externally:  When the time-domain digitizer function is selected: the control platform configures the digitizer module through the PXIe bus to receive the low-frequency signal directly from the hardware interface of the synthesized instrument through the signal line through channel, and the digitizer module processes the low-frequency signal, and then sends the processing result to the control platform; When the IF digitizer function is selected: the control platform starts and configures the down-conversion local oscillator and down-conversion module through the PXIe bus, configures the digitizer module to receive the IF signal directly from the down-conversion module, processes the IF signal, and then processes the IF signal through the PXIe bus. The results are sent to the control platform; When the arbitrary waveform generator function is selected: the control platform starts the signal generator module to switch to the arbitrary waveform generator function through the PXIe bus, and sends the generated waveform to the hardware interface of the synthesized instrument through the signal line through channel; When the RF signal source function is selected: the control platform starts the signal generator module to switch to the baseband signal generator function through the PXIe bus, and starts and configures the up-conversion module and the up-conversion local oscillator module. The baseband signal generator will generate two IQ The two signals are sent to the up-conversion module; The intermediate frequency digitizer function includes a radio frequency spectrum analyzer function; the control platform is further used for: When the digitizer module is selected to be in the radio frequency spectrum analyzer function, the control platform starts the down-conversion local oscillator and the down-conversion module to work through the PXIe bus, and configures the local oscillator frequency of the down-conversion local oscillator to change cyclically within a range, thereby realizing scanning frequency function; the down-conversion module has multiple intermediate frequency IFs, and each IF corresponds to a bandwidth. The control platform configures the IF of the down-conversion module so that the signal output to the digitizer module is within the required bandwidth; the control platform configures digitization through the PXIe bus The instrument module directly receives the intermediate frequency signal from the down conversion module, and the digitizer module collects and stores the intermediate frequency signal, and then sends the stored waveform data to the control platform through the PXIe bus, and the control platform completes the spectrum analysis process; IF digitizer functionality includes vector signal analyzer functionality; said control platform is further used to: When the selected digitizer module is in the vector signal analyzer function, the control platform starts the down-conversion local oscillator and the down-conversion module to work through the PXIe bus, and configures the local oscillator frequency of the down-conversion local oscillator to be fixed at the preset point frequency. The IF of the down-conversion module makes the signal output to the digitizer module within the required bandwidth; the control platform configures the digitizer module to directly receive the intermediate frequency signal from the down-conversion module, and the digitizer module carries out digital down-conversion to the intermediate frequency signal to obtain I, The Q component is sent to the control platform through the PXIe bus, and the control platform completes the vector signal analysis function; The digitizer module includes an intermediate frequency digitizer input port, a time domain digitizer input port, a port selection circuit, a signal conditioning circuit, an A/D conversion circuit and a digital processing unit; the digital processing unit includes an intermediate frequency digitizer digital signal processing channel , time-domain digitizer digital signal processing channel and PXIe bus interface; a) When the digitizer module is in the time domain digitizer function: The port selection circuit selects the input port of the time-domain digitizer according to the configuration information from the PXIe bus to receive the signal from the hardware interface of the synthesis instrument, and the received signal is sent to the digital signal processing channel of the time-domain digitizer after passing through the signal conditioning circuit and the A/D conversion circuit ; The digital signal processing channel of the time-domain digitizer realizes trigger detection, data storage and waveform parameter estimation processing, and the processing results are sent to the control platform through the PXIe bus interface; b) When the digitizer module is in the IF digitizer function: The port selection circuit selects the input port of the intermediate frequency digitizer according to the configuration information from the PXIe bus to receive the signal from the down conversion module, and the received signal is sent to the digital signal processing channel of the intermediate frequency digitizer after passing through the signal conditioning circuit and the A/D conversion circuit; the intermediate frequency digitization The digital signal processing channel of the instrument realizes digital down-conversion and data storage, and the processing results are sent to the control platform through the PXIe bus interface; The signal generator module includes an arbitrary waveform generator port, a baseband signal generator I port, a baseband signal generator Q port, a PXIe bus interface, a waveform engine, a storage management module, a memory chip, a baseband signal processing engine, a dual channel D/ A converter, signal conditioning circuit A and signal conditioning circuit B; c) When the signal generator module is in the arbitrary waveform generator function: The PXIe bus interface downloads the waveform data configured by the control platform to the storage chip through the storage management module; after starting to work, the waveform engine obtains the waveform data from the storage chip through the storage management module, and directly sends it to the dual-channel D/A converter One of the channels is output after digital-to-analog conversion, and the signal conditioning circuit A performs amplitude adjustment and offset operations on the output of the dual-channel D/A converter according to the configured waveform parameters, and finally the analog waveform signal is directly passed through the port of the arbitrary waveform generator. output to the synthesis instrument hardware interface; d) When the signal generator module is in the baseband signal generator function: The PXIe bus interface downloads the waveform data configured by the control platform to the storage chip through the storage management module; after starting to work, the waveform engine obtains the waveform data from the storage chip through the storage management module, and sends it to the baseband signal processing engine for interpolation and processing. Digital filtering process, to get I, Q two digital signals, I, Q two digital signals are respectively sent to the two channels of the dual-channel D/A converter for digital-to-analog conversion, and the two signal conditioning circuits are configured according to the configured waveform parameters. The two-way signals output by the dual-channel D/A converter are subjected to amplitude adjustment and bias operation, and finally the I and Q two-way analog signals are sent to the up-conversion module through the I port and Q port of the baseband signal generator. the 2. the comprehensive instrument as claimed in claim 1, is characterized in that, this comprehensive instrument further comprises the first preselector; The first preselector is connected to the down conversion module and connected to the PXIe bus, and the first preselector filters the input radio frequency signal before the down conversion module; the control platform configures the first preselector to participate in or not participate in the radio frequency signal filtering process through the PXIe bus, and to participate in The center frequency in case of filtering. the 3. the comprehensive instrument as claimed in claim 1, is characterized in that, this comprehensive instrument further comprises the second preselector; The second preselector is connected with the up-conversion module and connected to the PXIe bus, and the second pre-selector filters the radio frequency signal output by the up-conversion module; the control platform configures the second preselector to participate in or not participate in the radio frequency signal filtering process through the PXIe bus, and The center frequency in the case of participating in filtering processing. the 4. The comprehensive instrument according to claim 1, wherein the control platform is further used to update the firmware of the digitizer module and the signal generator module through the PXIe bus. the 5. The comprehensive instrument according to claim 1, wherein the PXIe system controller adopts a PXIe embedded system controller or a PXIe plug-in system controller. the