CN214201637U - Automatic test system of broadband signal acquisition playback system - Google Patents
Automatic test system of broadband signal acquisition playback system Download PDFInfo
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- CN214201637U CN214201637U CN202121255054.4U CN202121255054U CN214201637U CN 214201637 U CN214201637 U CN 214201637U CN 202121255054 U CN202121255054 U CN 202121255054U CN 214201637 U CN214201637 U CN 214201637U
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Abstract
The invention provides an automatic test system of a broadband signal acquisition playback system, wherein a PXI zero slot controller, a PXI vector signal generator board card, a PXI vector signal analysis board card and a PXI signal conversion switch are connected to a PXI bus and are installed in a PXI case, the PXI signal conversion switch is connected with the broadband signal acquisition playback system, and a port of the tested broadband signal acquisition playback system is switched by the PXI signal conversion switch to be connected to the PXI vector signal generator board card or the PXI vector signal analysis board card. The invention saves the tedious instrument connection process, improves the test efficiency, leads the measurement result to be more accurate and have better consistency, comprises automatic test software, has light volume and convenient carrying, can be used for field test, improves the accuracy of frequency measurement, avoids using an external time base and increases the complexity of the system.
Description
Technical Field
The invention relates to the technical field of instrument measurement, in particular to an automatic test system which can be used for testing a broadband signal acquisition playback system.
Background
The broadband signal acquisition playback system is a test product developed for high-bandwidth signal acquisition application, can be used as important support equipment in testing and simulation in communication, radar and navigation systems, and has the functions of broadband data acquisition, storage playback and the like. The device has the advantages of wide acquisition bandwidth, more parameters and other strong test functions, and is widely used in engineering measurement in the industries such as communication electronics and the like, particularly in an external field.
But because this kind of equipment test has index complexity height, and instrument calibration sets up and the wiring consumes time long, and the shortcoming that work load is big urgently need carry out automated transformation to test system, promotes efficiency of software testing. Meanwhile, due to the complexity of test parameters, a plurality of instruments are required for testing, and the portable multifunctional tester is large in size, heavy in weight and inconvenient to carry.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an automatic testing system of a broadband signal acquisition playback system, which is based on a PXI bus system architecture, saves the system volume, integrates the testing function and enables various parameters of the broadband signal acquisition playback system to finally trace to the national standard.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides an automatic test system of broadband signal acquisition playback system, including PXI quick-witted case (1), PXI zero slot controller (2), PXI vector signal generator board card (3), PXI vector signal analysis integrated circuit board (4) and PXI signal transfer switch (5) all connect in the PXI bus and install in PXI quick-witted case (1), PXI signal transfer switch (5) connect broadband signal acquisition playback system, PXI signal transfer switch (5) switch is surveyed the port of broadband signal acquisition playback system and is connected to PXI vector signal generator board card (3) or PXI vector signal analysis integrated circuit board (4).
The PXI zero slot controller (2) controls a PXI vector signal generator board card (3), a PXI vector signal analysis board card (4) and a PXI signal conversion switch (5), sets the transmitting frequency and the transmitting level of the PXI vector signal generator board card (3), sets the central frequency, the reference level, the vertical scale, the resolution bandwidth and the scanning time parameter of the PXI vector signal analysis board card (4), performs mathematical analysis on the acquired signals to obtain a measurement result, judges whether technical indexes of the broadband signal acquisition playback system meet requirements or not, and finally generates a test report.
The PXI vector signal generator board card (3) emits signals in a signal acquisition bandwidth of a broadband signal acquisition playback system, the frequency range is 10 MHz-6 GHz, the level range is-120 dBm-0 dBm, and signal input frequency, signal acquisition vertical scale and signal acquisition in-band frequency response parameters are measured.
The PXI vector signal analysis board card (4) measures signals emitted by the broadband signal acquisition playback system, the frequency range is 20 Hz-6 GHz, and the time base is +/-1 multiplied by 10-6The display noise level is-140 dBm, and the display nonlinearity is less than 0.1 dB; the device is used for measuring signal playback frequency, signal playback in-band frequency response and local oscillator leakage parameters; the PXI vector signal analysis board card (4) and the PXI vector signal generator board card (3) use the same time base, or cannot use the same time base, the time bases are synchronized, and the accuracy in parameter measurement of the signal playback frequency is guaranteed.
When signal input frequency measurement is carried out, the PXI zero slot controller (2) controls the PXI vector signal generator board card (3), the output frequency of the PXI vector signal generator board card (3) is set, continuous wave signals are emitted, the PXI zero slot controller (2) controls the center frequency of the broadband signal acquisition playback system, the output frequency of the PXI vector signal generator board card (3) is adjusted according to the center frequency value, a fundamental wave spectral line of the PXI vector signal generator board card (3) is aligned with a center scale line on a display screen of the broadband signal acquisition playback system to be calibrated, and the frequency value of the PXI vector signal generator board card (3) is read; and measuring the vertical scale of signal acquisition and processing the same frequency in a signal acquisition band, and changing the frequency alignment into vertical scale alignment and level alignment on a frequency response point.
When signal playback frequency measurement is carried out, a PXI zero slot controller (2) controls a PXI vector signal generator board card (3), the output frequency of the PXI vector signal generator board card (3) is set, a continuous wave signal is transmitted, the PXI zero slot controller (2) controls and sets the central frequency of a broadband signal acquisition playback system, the broadband signal acquisition playback system is used for recording the signal 1s time, a signal file recorded by the broadband signal acquisition playback system is called, and the signal is played back; the PXI signal conversion switch (5) is switched to the PXI vector signal analysis board card (4), and the frequency value of the broadband signal acquisition playback system is measured by using the PXI vector signal analysis board card (4); measuring the same treatment of in-band frequency response of signal playback, and changing frequency alignment into level alignment on a frequency response point; and (3) carrying out the same processing of local oscillator leakage measurement, setting the collected central frequency as a transmitting frequency point of the PXI vector signal generator board card (3), and finally measuring the level value of the returned central frequency point.
The invention has the beneficial effects that:
1. according to the invention, a set of automatic test system is built by adopting an automatic instrument control technology, so that a complicated instrument connection process is omitted, and the test efficiency is improved; because the cables among all instruments and modules are fixed, the measurement result is more accurate and has better consistency.
2. The invention integrates a plurality of instruments for testing into one PXI case, and the case contains a zero-slot controller and automatic testing software, has light volume and convenient carrying and can be used for field testing. The board cards in the same case can share the time base, so that the accuracy of frequency measurement is improved, the use of an external time base is avoided, and the complexity of the system is increased.
Drawings
FIG. 1 is a system test connection diagram of the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
In order to achieve the purpose, the automatic test system of the broadband signal acquisition playback system comprises a PXI case (1), a PXI zero slot controller (2), a PXI vector signal generator board card (3), a PXI vector signal analysis board card (4) and a PXI signal conversion switch (5), wherein the PXI zero slot controller (2), the PXI vector signal generator board card (3), the PXI vector signal analysis board card (4) and the PXI signal conversion switch (5) are connected to a PXI bus and installed in the PXI case (1), the PXI signal conversion switch (5) is connected with the broadband signal acquisition playback system, and the PXI signal conversion switch (5) switches a port of the broadband signal acquisition playback system to be tested to be connected to the PXI vector signal generator board card (3) or the PXI vector signal analysis board card (4).
The PXI vector signal generator board card (3) is responsible for emitting signals in a signal acquisition bandwidth of a broadband signal acquisition playback system, the frequency range of the PXI vector signal generator board card is 10 MHz-6 GHz, and the level range of the PXI vector signal generator board card is-120 dBm-0 dBm. Can be used for measuring signal input frequency, signal acquisition vertical scale and signal acquisition in-band frequency response parameter
The PXI vector signal analysis board card (4) is responsible for measuring signals emitted by the broadband signal acquisition playback system, the frequency range of the signals is 20 Hz-6 GHz, and the time base is +/-1 multiplied by 10-6The display noise level is-140 dBm, and the display nonlinearity is less than 0.1 dB. The method can be used for measuring signal playback frequency, signal playback in-band frequency response and local oscillator leakage parameters. The PXI vector signal analysis board card (4) and the PXI vector signal generator board card need to use the same time base or cannot use the same time base, and time bases need to be synchronized, so that the accuracy in parameter measurement of signal playback frequency is guaranteed.
The PXI zero slot controller (2) is responsible for controlling a PXI vector signal generator board card (3), a PXI vector signal analysis board card (4) and a PXI signal conversion switch (5), setting the transmitting frequency and the transmitting level of the PXI vector signal generator board card (3), setting the parameters of the center frequency, the reference level, the vertical scale, the resolution bandwidth, the scanning time and the like of the PXI vector signal analysis board card (4), performing mathematical analysis on the acquired signals to obtain a measurement result, judging whether technical indexes of the broadband signal acquisition playback system meet requirements or not, and finally generating a test report.
The PXI signal conversion switch (5) is responsible for switching the port of the tested broadband signal acquisition playback system to be connected to the PXI vector signal generator board card (3) or the PXI vector signal analysis board card (4),
when signal input frequency measurement is carried out, the PXI zero slot controller (2) controls and sets the output frequency of the PXI vector signal generator board card (3) and transmits a continuous wave signal, the PXI zero slot controller (2) controls and sets the center frequency of the broadband signal acquisition playback system, the output frequency of the PXI vector signal generator board card (3) is adjusted according to the center frequency value, a fundamental wave spectral line of the PXI vector signal generator board card is aligned with a center scale line on a display screen of the broadband signal acquisition playback system to be calibrated, and the frequency value of the PXI vector signal generator board card (3) is read. And measuring the vertical scale of signal acquisition and the in-band frequency of signal acquisition according to the steps, and changing the frequency alignment into vertical scale alignment and level alignment on a frequency response point.
When signal playback frequency measurement is carried out, the PXI zero slot controller (2) controls and sets the output frequency of the PXI vector signal generator board card (3) and transmits a continuous wave signal, the PXI zero slot controller (2) controls and sets the center frequency of the broadband signal acquisition playback system, the broadband signal acquisition playback system is used for recording the signal 1s time, a signal file recorded by the broadband signal acquisition playback system is called, and the signal is played back. The PXI signal conversion switch (5) is switched to the PXI vector signal analysis board card (4), and the frequency value of the broadband signal acquisition playback system is measured by using the PXI vector signal analysis board card (4). And measuring the in-band frequency response of the signal playback, and changing the frequency alignment into the level alignment on the frequency response point according to the steps. And measuring local oscillator leakage, setting the collected central frequency as a transmitting frequency point of the cheap PXI vector signal generator board card (3), and finally measuring the level value of the returned central frequency point.
Fig. 1 shows a system test connection diagram of the present invention, a radio frequency port of a tested broadband signal acquisition playback system is connected to a central port of a PXI signal conversion switch (5), the other two ports of the PXI signal conversion switch (5) are respectively connected to a PXI vector signal generator board (3) and a PXI vector signal analysis board (4), a PXI zero slot controller (2), the PXI vector signal generator board (3) and the PXI vector signal analysis board (4), the PXI signal conversion switch (5) is integrated in a PXI chassis (1), and the PXI zero slot controller (2) controls the PXI vector signal generator board (3), the PXI vector signal analysis board (4) and the PXI signal conversion switch (5) through a PXI bus in the PXI chassis (1).
The above description is only one specific example of the present invention, and it is obvious to those skilled in the art that various modifications and changes in form and detail can be made without departing from the principle of the present invention, but these modifications and changes based on the idea of the present invention are still within the protection scope of the claims of the present invention.
Claims (6)
1. The utility model provides an automatic test system of broadband signal acquisition playback system, includes PXI quick-witted case (1), PXI zero slot controller (2), PXI vector signal generator board card (3), PXI vector signal analysis board card (4) and PXI signal transfer switch (5), its characterized in that:
the automatic test system of the broadband signal acquisition playback system comprises a PXI zero slot controller (2), a PXI vector signal generator board card (3), a PXI vector signal analysis board card (4) and a PXI signal conversion switch (5), wherein the PXI vector signal analysis board card (5) is connected to a PXI bus and is installed in a PXI case (1), the PXI signal conversion switch (5) is connected with the broadband signal acquisition playback system, and the PXI signal conversion switch (5) switches a port of the tested broadband signal acquisition playback system to be connected to the PXI vector signal generator board card (3) or the PXI vector signal analysis board card (4).
2. The system for automatically testing a broadband signal acquisition playback system according to claim 1, wherein:
the PXI zero slot controller (2) controls a PXI vector signal generator board card (3), a PXI vector signal analysis board card (4) and a PXI signal conversion switch (5), sets the transmitting frequency and the transmitting level of the PXI vector signal generator board card (3), sets the central frequency, the reference level, the vertical scale, the resolution bandwidth and the scanning time parameter of the PXI vector signal analysis board card (4), performs mathematical analysis on the acquired signals to obtain a measurement result, judges whether technical indexes of the broadband signal acquisition playback system meet requirements or not, and finally generates a test report.
3. The system for automatically testing a broadband signal acquisition playback system according to claim 1, wherein:
the PXI vector signal generator board card (3) emits signals in a signal acquisition bandwidth of a broadband signal acquisition playback system, the frequency range is 10 MHz-6 GHz, the level range is-120 dBm-0 dBm, and signal input frequency, signal acquisition vertical scale and signal acquisition in-band frequency response parameters are measured.
4. The system for automatically testing a broadband signal acquisition playback system according to claim 1, wherein:
the PXI vector signal analysis board card (4) measures signals transmitted by a broadband signal acquisition playback system, the frequency range is 20 Hz-6 GHz, and the time base is +/-1 multiplied by 10-6The display noise level is-140 dBm, and the display nonlinearity is less than 0.1 dB; the device is used for measuring signal playback frequency, signal playback in-band frequency response and local oscillator leakage parameters; the PXI vector signal analysis board card (4) and the PXI vector signal generator board card (3) use the same time base, or cannot use the same time base, the time bases are synchronized, and the accuracy in parameter measurement of the signal playback frequency is guaranteed.
5. The system for automatically testing a broadband signal acquisition playback system according to claim 1, wherein:
when signal input frequency measurement is carried out, the PXI zero slot controller (2) controls the PXI vector signal generator board card (3), the output frequency of the PXI vector signal generator board card (3) is set, continuous wave signals are emitted, the PXI zero slot controller (2) controls the center frequency of the broadband signal acquisition playback system, the output frequency of the PXI vector signal generator board card (3) is adjusted according to the center frequency value, a fundamental wave spectral line of the PXI vector signal generator board card (3) is aligned with a center scale line on a display screen of the broadband signal acquisition playback system to be calibrated, and the frequency value of the PXI vector signal generator board card (3) is read; and measuring the vertical scale of signal acquisition and processing the same frequency in a signal acquisition band, and changing the frequency alignment into vertical scale alignment and level alignment on a frequency response point.
6. The system for automatically testing a broadband signal acquisition playback system according to claim 1, wherein:
when signal playback frequency measurement is carried out, a PXI zero slot controller (2) controls a PXI vector signal generator board card (3), the output frequency of the PXI vector signal generator board card (3) is set, a continuous wave signal is transmitted, the PXI zero slot controller (2) controls and sets the central frequency of a broadband signal acquisition playback system, the broadband signal acquisition playback system is used for recording the signal 1s time, a signal file recorded by the broadband signal acquisition playback system is called, and the signal is played back; the PXI signal conversion switch (5) is switched to the PXI vector signal analysis board card (4), and the frequency value of the broadband signal acquisition playback system is measured by using the PXI vector signal analysis board card (4); measuring the same treatment of in-band frequency response of signal playback, and changing frequency alignment into level alignment on a frequency response point; and (3) carrying out the same processing of local oscillator leakage measurement, setting the collected central frequency as a transmitting frequency point of the PXI vector signal generator board card (3), and finally measuring the level value of the returned central frequency point.
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| CN202121255054.4U CN214201637U (en) | 2021-06-05 | 2021-06-05 | Automatic test system of broadband signal acquisition playback system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114088978A (en) * | 2021-11-16 | 2022-02-25 | 中国电子科技集团公司第二十研究所 | PXI structure-based calibration method and device for TACAN signal speed parameters |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114088978A (en) * | 2021-11-16 | 2022-02-25 | 中国电子科技集团公司第二十研究所 | PXI structure-based calibration method and device for TACAN signal speed parameters |
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