CN107918070B - Digital T/R assembly test system and transmitting and receiving state test method thereof - Google Patents
Digital T/R assembly test system and transmitting and receiving state test method thereof Download PDFInfo
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Abstract
The invention especially relates to a digital T/R assembly test system, which comprises a tested digital T/R assembly, a coherent transmitting module connected with the input end of the digital T/R assembly, a coherent receiving module connected with the output end of the digital T/R assembly, a multipath light control module connected with the digital T/R assembly, and a control module for outputting control instructions and test parameters to the coherent transmitting module, the coherent receiving module and the multipath light control module; and discloses a transmitting and receiving state testing method thereof. The invention can realize automatic test of various indexes of a single channel and coherent indexes of multiple channels, can automatically finish the calibration of the digital T/R assembly, does not need to plug and pull instruments for many times, realizes the automatic test of the digital T/R assembly, improves the test efficiency and reduces the system error and the test time.
Description
Technical Field
The invention relates to the technical field of digital T/R component testing, in particular to a digital T/R component testing system and a transmitting and receiving state testing method thereof.
Background
The digital T/R component test system generally consists of a transmitting state test system and a receiving state test system. For the test of the emission state, it is now common practice to: the microwave signal is obtained by converting the signal of the transmitting end of the digital T/R assembly, then various indexes are obtained by testing through a series of testing instruments, and then a testing result is obtained by analyzing the various indexes, so that the testing method is simple, but when different testing indexes are switched, the situation of plugging and unplugging the instrument for many times can occur, so that the system is easy to have problems in testing, and the testing result is inaccurate; it also takes a lot of time. For the test of the receiving state, because the receiving end of the digital T/R assembly outputs the optical signal, the test instrument cannot be used, and the existing method is to carry out data processing and analysis on the optical signal so as to obtain various indexes. Whether the test is in the transmitting state or the receiving state, the multi-channel coherent test is not easy to realize when the indexes are tested, so the test efficiency is low; at the same time, they do not take into account the calibration problem of the digital T/R components, which also results in insufficiently accurate results from the test.
Disclosure of Invention
The invention aims to provide a digital T/R component testing system which is high in testing efficiency and accurate in testing result.
In order to realize the purpose, the invention adopts the technical scheme that: a digital T/R component test system comprises a tested digital T/R component, a coherent transmitting module, a coherent receiving module, a multi-path light control module and a control module; the coherent transmitting module is connected with the input end of the digital T/R component and is used for outputting a multi-channel coherent radio frequency signal to the digital T/R component to be tested; the coherent receiving module is connected with the output end of the digital T/R component and is used for receiving and processing coherent radio frequency signals output by the digital T/R component; the multi-path light control module is used for providing a power supply, a local oscillator and a coherent clock for the digital T/R assembly, is connected with the input end of the digital T/R assembly to output a light signal to the digital T/R assembly when the transmission state test of the digital T/R assembly is carried out, and is connected with the output end of the digital T/R assembly to receive the light signal output by the digital T/R assembly when the receiving state test of the digital T/R assembly is carried out; the control module outputs control instructions and test parameters to the coherent transmitting module, the coherent receiving module and the multipath light control module and stores test result data.
Compared with the prior art, the invention has the following technical effects: after the system is built, various indexes of a single channel and coherent indexes of multiple channels can be automatically tested, the digital T/R assembly can be automatically calibrated, instruments do not need to be plugged and pulled for many times, the automatic test of the digital T/R assembly is realized, the test efficiency is improved, and the system error and the test time are reduced.
Another object of the present invention is to provide a testing method of a digital T/R device testing system with high testing efficiency.
In order to realize the purpose, the invention adopts the technical scheme that:
the emission state test comprises the following steps: (A1) initializing each module of the test system; (B1) controlling a multipath light control module to provide a power supply, a local oscillator and a coherent clock of the digital T/R component; (C1) controlling the digital T/R component to work in a transmitting state; (D1) controlling the digital T/R component to normally work or to carry out phase shift switching or amplitude control according to the test index; (E1) controlling a multi-path light control module to generate a tested light signal; (F1) controlling a coherent receiving module to process the radio frequency signal output by the digital T/R component; (G1) and obtaining and storing a test index result to finish the test.
The receiving state test comprises the following steps: (A2) initializing each module of the test system; (B2) controlling a multipath light control module to provide a power supply, a local oscillator and a coherent clock of the digital T/R component; (C2) controlling the digital T/R component to work in a receiving state; (D2) controlling the digital T/R component to normally work or to carry out phase shift switching or amplitude control according to the test index; (E2) controlling the coherent transmitting module to generate a tested radio frequency signal waveform; (F2) controlling a multipath light control module to process the optical signal output by the digital T/R assembly; (G2) and obtaining and storing a test index result to finish the test.
Compared with the prior art, the invention has the following technical effects: the control module controls other modules, so that the automatic test of the digital T/R component can be conveniently and automatically realized, the test efficiency is improved, and the system error and the test time are reduced.
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FIG. 1 is a functional block diagram of a digital T/R component launch test system of the present invention;
FIG. 2 is a functional block diagram of a digital T/R component reception test system of the present invention;
FIG. 3 is a flow chart of a digital T/R device transmission status testing method of the present invention;
FIG. 4 is a flow chart of a digital T/R device reception status testing method of the present invention;
FIG. 5 is a flow chart of a digital T/R module transmit state calibration algorithm of the present invention;
FIG. 6 is a flow chart of the digital T/R module reception status calibration algorithm of the present invention.
Detailed Description
The present invention will be described in further detail with reference to fig. 1 to 6.
Referring to fig. 1 and 2, a digital T/R assembly testing system includes a digital T/R assembly to be tested, a coherent transmitting module, a coherent receiving module, a multi-path light control module, and a control module; the coherent transmitting module is connected with the input end of the digital T/R component and is used for outputting a multi-channel coherent radio frequency signal to the digital T/R component to be tested; and the coherent receiving module is connected with the output end of the digital T/R component and is used for receiving and processing coherent radio frequency signals output by the digital T/R component. The multipath light control module is used for providing a power supply, a local oscillator and a coherent clock for the digital T/R component. When the digital T/R assembly emission state test is performed, as shown in fig. 1, the multi-path optical control module is connected to the input end of the digital T/R assembly for outputting an optical signal to the digital T/R assembly. When the digital T/R assembly reception status test is performed, as shown in fig. 2, the multi-path optical control module is connected to the output terminal of the digital T/R assembly for receiving the optical signal output by the digital T/R assembly. The control module outputs control instructions and test parameters to the coherent transmitting module, the coherent receiving module and the multipath light control module and stores test result data, so that the control module can realize equipment control and test parameter configuration of the coherent transmitting module, the coherent receiving module and the multipath light control module. After the system is built, various indexes of a single channel and coherent indexes of multiple channels can be automatically tested, the digital T/R assembly can be automatically calibrated, instruments do not need to be plugged and pulled for many times, the automatic test of the digital T/R assembly is realized, the test efficiency is improved, and the system error and the test time are reduced.
In this embodiment, the coherent transmitting module includes a waveform generator and a multi-channel synchronization circuit, where the waveform generator is configured to generate an arbitrary waveform, and the multi-channel synchronization circuit is configured to implement coherence of the multi-channel arbitrary waveform. Thus, the coherent transmitting module can generate a multi-channel coherent arbitrary waveform and output the multi-channel coherent arbitrary waveform to the digital T/R component. The phase-coherent receiving module comprises a multi-channel phase-coherent receiver, and the multi-channel phase-coherent receiver is used for carrying out phase-coherent receiving and processing on output signals of the digital T/R component. The multichannel optical control module comprises a power supply network, a local oscillator distribution network, a clock distribution network and a multichannel optical transceiver, wherein the power supply network provides power supply for the digital T/R assembly, the local oscillator distribution network provides a local oscillator for the digital T/R assembly, the clock distribution network provides a coherent clock for the digital T/R assembly, and the multichannel optical transceiver is used for outputting multichannel optical signals to the digital T/R assembly or receiving the multichannel optical signals output by the digital T/R assembly.
The invention also discloses a test method of the digital T/R component test system, which comprises a transmitting state test and a receiving state test.
Referring to fig. 3, the transmission status test includes the steps of: (A1) initializing each module of the test system; (B1) controlling a multipath light control module to provide a power supply, a local oscillator and a coherent clock of the digital T/R component; (C1) controlling the digital T/R component to work in a transmitting state; (D1) controlling the digital T/R component to normally work or to carry out phase shift switching or amplitude control according to the test index; (E1) controlling a multi-path light control module to generate a tested light signal; (F1) controlling a coherent receiving module to process the radio frequency signal output by the digital T/R component; (G1) and obtaining and storing a test index result to finish the test.
Referring to fig. 4, the reception status test includes the steps of: (A2) initializing each module of the test system; (B2) controlling a multipath light control module to provide a power supply, a local oscillator and a coherent clock of the digital T/R component; (C2) controlling the digital T/R component to work in a receiving state; (D2) controlling the digital T/R component to normally work or to carry out phase shift switching or amplitude control according to the test index; (E2) controlling the coherent transmitting module to generate a tested radio frequency signal waveform; (F2) controlling a multipath light control module to process the optical signal output by the digital T/R assembly; (G2) and obtaining and storing a test index result to finish the test.
The control module controls other modules, so that the automatic test of the digital T/R component can be conveniently and automatically realized, the test efficiency is improved, and the system error and the test time are reduced.
Preferably, in the steps D1 and D2, if the phase shift parameter is tested, the digital T/R module is controlled to perform phase shift switching, if the channel gain or the channel attenuation range is tested, the digital T/R module is controlled to perform amplitude control, and for other test indexes, the digital T/R module is in a normal operating state. The control steps are added into the test flow, so that the test automation can be well realized, the influence of human factors on the test result is reduced, and the test accuracy is improved.
As a preferred scheme of the invention, before the test of the transmitting state or the receiving state, the transmitting calibration or the receiving calibration is also carried out, and the error introduced by a system cable and an instrument can be reduced, the test error is reduced and the test accuracy is improved by calibrating and compensating the amplitude/phase parameters of multiple channels of the system.
A flowchart of the transmit state calibration is shown in fig. 5, which includes the steps of: (A3) the coherent receiving module is calibrated independently, so that errors caused by the module are reduced; (B3) controlling a multi-path light control module to generate a multi-path calibration light signal; (C3) controlling the digital T/R component to work in a non-phase-shifting state; (D3) acquiring the amplitude and the phase of a multi-channel signal of a coherent receiving module; (E3) calculating the amplitude and the phase of the channels to be calibrated, and storing the calibration result into a calibration file; (F3) and compensating the amplitude and the phase into corresponding channel waveforms of the digital T/R component in a file interaction mode.
The flow chart of the receive state calibration is shown in fig. 6, which includes the following steps: (A4) the coherent transmitting module is calibrated independently, so that errors caused by the module are reduced; (B4) controlling a coherent transmitting module to generate a plurality of paths of calibration continuous wave signals; (C4) controlling the digital T/R component to work in a non-phase-shifting state; (D4) acquiring the amplitude and the phase of a multichannel signal of a multichannel light control module; (E4) calculating the amplitude and the time delay of the channels needing to be calibrated, and storing the calibration result into a calibration file; (F4) and compensating the amplitude and the time delay into the corresponding channel waveform of the coherent transmitting module in a file interaction mode.
Claims (8)
1. A digital T/R assembly testing system, characterized by: the device comprises a tested digital T/R component, a coherent transmitting module, a coherent receiving module, a multipath light control module and a control module; the coherent transmitting module is connected with the input end of the digital T/R component and is used for outputting a multi-channel coherent radio frequency signal to the digital T/R component to be tested; the coherent receiving module is connected with the output end of the digital T/R component and is used for receiving and processing coherent radio frequency signals output by the digital T/R component; the multi-path light control module is used for providing a power supply, a local oscillator and a coherent clock for the digital T/R assembly, is connected with the input end of the digital T/R assembly to output a light signal to the digital T/R assembly when the transmission state test of the digital T/R assembly is carried out, and is connected with the output end of the digital T/R assembly to receive the light signal output by the digital T/R assembly when the receiving state test of the digital T/R assembly is carried out; the control module outputs control instructions and test parameters to the coherent transmitting module, the coherent receiving module and the multipath light control module and stores test result data;
the digital T/R component emission state test also comprises an emission state calibration process, which comprises the following steps: (A3) the coherent receiving module is calibrated independently, so that errors caused by the module are reduced; (B3) controlling a multi-path light control module to generate a multi-path calibration light signal; (C3) controlling the digital T/R component to work in a non-phase-shifting state; (D3) acquiring the amplitude and the phase of a multi-channel signal of a coherent receiving module; (E3) calculating the amplitude and the phase of the channels to be calibrated, and storing the calibration result into a calibration file; (F3) compensating the amplitude and the phase into corresponding channel waveforms of the digital T/R component in a file interaction mode;
the coherent transmitting module comprises a waveform generator and a multi-channel synchronous circuit, wherein the waveform generator is used for generating arbitrary waveforms, and the multi-channel synchronous circuit is used for realizing the coherence of the multi-channel arbitrary waveforms;
the phase-coherent receiving module comprises a multi-channel phase-coherent receiver, and the multi-channel phase-coherent receiver is used for carrying out phase-coherent receiving and processing on output signals of the digital T/R component.
2. The digital T/R component testing system of claim 1, wherein: the multichannel optical control module comprises a power supply network, a local oscillator distribution network, a clock distribution network and a multichannel optical transceiver, wherein the power supply network provides power supply for the digital T/R assembly, the local oscillator distribution network provides a local oscillator for the digital T/R assembly, the clock distribution network provides a coherent clock for the digital T/R assembly, and the multichannel optical transceiver is used for outputting multichannel optical signals to the digital T/R assembly or receiving the multichannel optical signals output by the digital T/R assembly.
3. A transmission status testing method implemented using the digital T/R assembly testing system of claim 1, comprising the steps of:
(A1) initializing each module of the test system;
(B1) controlling a multipath light control module to provide a power supply, a local oscillator and a coherent clock of the digital T/R component;
(C1) controlling the digital T/R component to work in a transmitting state;
(D1) controlling the digital T/R component to normally work or to carry out phase shift switching or amplitude control according to the test index;
(E1) controlling a multi-path light control module to generate a tested light signal;
(F1) controlling a coherent receiving module to process the radio frequency signal output by the digital T/R component;
(G1) obtaining and storing a test index result to finish the test;
before the emission state test is carried out, emission calibration is also carried out, and the amplitude/phase parameters of multiple channels of the system are calibrated and compensated.
4. The method for testing a digital T/R assembly test system of claim 3, wherein: in the step D1, if the phase shift parameter is tested, the digital T/R component is controlled to perform phase shift switching, if the channel gain or the channel attenuation range is tested, the digital T/R component is controlled to perform amplitude control, and for other test indexes, the digital T/R component is in a normal working state.
5. The method for testing a digital T/R assembly test system of claim 3, wherein: the method also comprises the following steps of calibrating the emission state before the emission state test, wherein the calibration of the emission state comprises the following steps:
(A3) the coherent receiving module is calibrated independently, so that errors caused by the module are reduced;
(B3) controlling a multi-path light control module to generate a multi-path calibration light signal;
(C3) controlling the digital T/R component to work in a non-phase-shifting state;
(D3) acquiring the amplitude and the phase of a multi-channel signal of a coherent receiving module;
(E3) calculating the amplitude and the phase of the channels to be calibrated, and storing the calibration result into a calibration file;
(F3) and compensating the amplitude and the phase into corresponding channel waveforms of the digital T/R component in a file interaction mode.
6. A reception status test method implemented using the digital T/R component test system of claim 1, comprising the steps of:
(A2) initializing each module of the test system;
(B2) controlling a multipath light control module to provide a power supply, a local oscillator and a coherent clock of the digital T/R component;
(C2) controlling the digital T/R component to work in a receiving state;
(D2) controlling the digital T/R component to normally work or to carry out phase shift switching or amplitude control according to the test index;
(E2) controlling the coherent transmitting module to generate a tested radio frequency signal waveform;
(F2) controlling a multipath light control module to process the optical signal output by the digital T/R assembly;
(G2) obtaining and storing a test index result to finish the test;
before the receiving state test, receiving calibration is also carried out, and amplitude/phase parameters of multiple channels of the system are calibrated and compensated.
7. The method for testing a digital T/R assembly test system of claim 6, wherein: in the step D2, if the phase shift parameter is tested, the digital T/R component is controlled to perform phase shift switching, if the channel gain or the channel attenuation range is tested, the digital T/R component is controlled to perform amplitude control, and for other test indexes, the digital T/R component is in a normal working state.
8. The method for testing a digital T/R assembly test system of claim 6, wherein: the method also comprises a receiving state calibration before the receiving state test, wherein the receiving state calibration comprises the following steps:
(A4) the coherent transmitting module is calibrated independently, so that errors caused by the module are reduced;
(B4) controlling a coherent transmitting module to generate a plurality of paths of calibration continuous wave signals;
(C4) controlling the digital T/R component to work in a non-phase-shifting state;
(D4) acquiring the amplitude and the phase of a multichannel signal of a multichannel light control module;
(E4) calculating the amplitude and the time delay of the channels needing to be calibrated, and storing the calibration result into a calibration file;
(F4) and compensating the amplitude and the time delay into the corresponding channel waveform of the coherent transmitting module in a file interaction mode.
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