CN104506258B - A kind of passive cross modulation test method of pulse regime - Google Patents
A kind of passive cross modulation test method of pulse regime Download PDFInfo
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- CN104506258B CN104506258B CN201410662637.7A CN201410662637A CN104506258B CN 104506258 B CN104506258 B CN 104506258B CN 201410662637 A CN201410662637 A CN 201410662637A CN 104506258 B CN104506258 B CN 104506258B
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Abstract
The present invention provides a kind of passive cross modulation test method of pulse regime, using two-way synchronously adjustable clock used as signal source, pulse signal is amplified to+43dBm (being calculated with measured piece port) by two pulse signals ingoing power amplification module.Pulse signal after two-way amplifies forms double-tone pulse by combiner, and the pulse is loaded onto measured piece, and excitation measured signal produces PIM (passive intermodulation) interference.Duplexer and two-tone signal isolation of the reflected P IM signals Jing Guo instrument internal.Two-tone signal is by load absorption, and tested PIM is received by the receiver synchronously crossed.Using such scheme, with following two advantages：(1) tester volume can be greatly reduced, makes it possible that passive cross modulation test becomes hand-held；(2) can be used battery to power, strengthen the portability and link adaptability of tester.
Description
Technical field
The invention belongs to passive cross modulation test technical field, more particularly to a kind of passive cross modulation test of pulse regime
Method.
Background technology
In modern communication systems, transreceiver sensitivity is higher, and system is larger using power, therefore cable, connection
The interference of the linear passive such as device device non-linearity just can not be ignored.It is passive to test the nonlinear tool of linear passive device
Intermodulation testing instrument, but most passive intermodulation instrument is all based on continuous wave system.The method of testing of passive intermodulation is generation two
Individual simple signal, the two-tone signal by forming two-way+43dBm after amplifier module amplification by combiner unit, by duplexer
It is loaded onto measured signal.The tested passive device of two-tone signal excitation forms PIM interference, and reverse PIM interference or forward direction PIM interference are logical
Duplexer is crossed to isolate with two-tone signal.Receiver receives PIM interference, detects its amplitude.Such a system is brought following several
Problem：One is larger heavier system, is unfavorable for portable；Two is the two-tone signal of system transmitting two-way+43dBm, therefore to electricity
Source, power amplifier requirement it is higher, it is necessary to power, it is impossible to use battery supply, influence the field adaptability of system.
Therefore, the prior art is defective, it is necessary to improve.
The content of the invention
The technical problems to be solved by the invention are that there is provided a kind of the passive mutual of pulse regime in view of the shortcomings of the prior art
Commissioning method for testing.
Technical scheme is as follows：
A kind of passive cross modulation test method of pulse regime, wherein, comprise the following steps：
Step 1：Tester source frequency is calibrated；
Step 2：Tester source power is calibrated；
Step 3：Tester receiver calibration；
Step 4：Tester impulsive synchronization is calibrated；
Step 5：Three sources are produced by frequency reference：Signal source 1, signal source 2 and local vibration source L0, signal source 1 produce signal
Frequency is designated as f1, and signal source 2 produces signal frequency to be designated as f2, and local vibration source produces signal to be designated as L0；Meanwhile, computer module is produced
Two-way lock-out pulse gate signal, its synchronizer is tuned；Two-way pulse gate signal is after pulse shaper, with signal source
1 and signal source 2 modulate, modulate two-way frequency be f1 and f2 pulse signal.
The passive cross modulation test method of described pulse regime, wherein, the step 1 is concretely comprised the following steps：Factory calibration,
Frequency accuracy is 1e-6MHz@10MHz.
The passive cross modulation test method of described pulse regime, wherein, the step 2 is concretely comprised the following steps：Calibration signal
Source 1 and signal source 2；The calibration steps of signal source 1, is first shut off signal source 2, and load is accessed in combiner original input port；Its
It is secondary to access pulse power meter in output port；Last opening signal source 1, is calibrated to 43dBm, now the pulse school of signal source 1
Standard is finished；The calibration steps of signal source 2：Signal source 1 is first shut off, load is accessed in combiner original input port；Secondly defeated
Exit port accesses pulse power meter；Finally give a signal source 2, calibrated to 43dBm, now the pulse matching of signal source 2 is finished.
The passive cross modulation test method of described pulse regime, wherein, the step 3 is concretely comprised the following steps：Standard is believed
Number source is directly accessed receiver A channel, the power of receiver detection and the difference of signal source power is recorded, when in use by calculating
Machine and FPGA module are modified.
The passive cross modulation test method of described pulse regime, wherein, the step 4 is concretely comprised the following steps：Will be passive mutual
PIM standard components are adjusted to access instrument, and rear end is loaded using low intermodulation and is connected, and PIM standard components are an adjustable connection of PIM
Device；The pulse delay of the seasonal signal source 1 of calibration is fixed, and provides the pulse delay scope of signal source 2；The pulse of linear scan signal source 2
Time delay, receiver test PIM response curves take the corresponding pulse delay of signal source 2 in midpoint in its steady interval as calibration
Value.
The passive cross modulation test method of described pulse regime, wherein, the step 5 is concretely comprised the following steps：Two-way pulse
Signal is amplified by amplifier turn into highpowerpulse respectively, and its power ＞ 43dBm synthesize double-tone pulse, double-tone by combiner
Pulse frequency is F1 and F2；Duplexer has two filtering channels of Tx and Rx, keeps certain mutual isolation；Double-tone pulse is passed through
The Tx passages for crossing duplexer are loaded onto measured piece, and measured piece encourages the passive intermodulation disturbing pulse of forward and backward, fl transmission
Disturbing pulse be designated as PIMT, PIMT and two-tone signal F1, F2 are by low intermodulation load absorption；Reflection passive intermodulation pulse is designated as
PIMR, the Rx passages by duplexer enter receiver, and receiver is named as A channel；PIMR signals are received by frequency mixer first,
The local oscillator of frequency mixer is provided by local vibration source L0, after keeping certain frequency difference, the frequency difference to cause mixing with the frequency of PIMR signals
Data-signal keep fixed frequency, be intermediate-freuqncy signal, after being nursed one's health through extra pulse intermediate frequency, be sent to AD samplings, then by DSP moulds
Block, computer FPGA module calculate signal amplitude, compensation is completed by intermediate frequency conditioning and the signal amplitude error that causes of local oscillator
PIMR signal amplitudes are measured.
The present invention replaces continuous wave two-tone signal using impulse modulation two-tone signal, receives passive mutual using pulse receiver
Adjust disturbing pulse.Under conditions of measured power+43dBm is ensured, the power of tester consumption is substantially reduced, therefore using this
The passive cross modulation test of system will have following two advantages：(1) tester volume can be greatly reduced, makes passive cross modulation test
Become hand-held to be possibly realized；(2) it battery can be used to power, strengthen the portability and link adaptability of tester.
Brief description of the drawings
Fig. 1 is the passive cross modulation test method schematic of pulse regime of the present invention.
Fig. 2 is source power calibrating principle figure in the inventive method.
Fig. 3 is receiver calibration schematic diagram in the inventive method.
Fig. 4 is pulse synchronous calibration schematic diagram in the inventive method.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
A kind of passive cross modulation test method of pulse regime, wherein, comprise the following steps：
Step 1：Tester source frequency is calibrated；
Step 2：Tester source power is calibrated；
Step 3：Tester receiver calibration；
Step 4：Tester impulsive synchronization is calibrated；
Step 5：Three sources are produced by frequency reference：Signal source 1, signal source 2 and local vibration source L0, signal source 1 produce signal
Frequency is designated as f1, and signal source 2 produces signal frequency to be designated as f2, and local vibration source produces signal to be designated as L0；Meanwhile, computer module is produced
Two-way lock-out pulse gate signal, its synchronizer is tuned；Two-way pulse gate signal by after pulse shaper, with signal source
1 and signal source 2 modulate, modulate two-way frequency be f1 and f2 pulse signal.
The step 1 is concretely comprised the following steps：Factory calibration, frequency accuracy is 1e-6MHz@10MHz.
The step 2 is concretely comprised the following steps：Calibration signal source 1 and signal source 2；The calibration steps of signal source 1, is first shut off
Signal source 2, load is accessed in combiner original input port；Secondly pulse power meter is accessed in output port；Last opening signal
Source 1, is calibrated to 43dBm, and now the pulse matching of signal source 1 is finished；The calibration steps of signal source 2：It is first shut off signal source
1, in the former input port access load of combiner；Secondly pulse power meter is accessed in output port；Finally give a signal source 2, by it
43dBm is calibrated to, now the pulse matching of signal source 2 is finished.
The step 3 is concretely comprised the following steps：Standard signal source is directly accessed receiver A channel, receiver detection is recorded
Power and signal source power difference, be modified by computer and FPGA module when in use.
The step 4 is concretely comprised the following steps：Passive intermodulation PIM standard components are accessed into instrument, and rear end uses low intermodulation
Load is connected, and PIM standard components are an adjustable connector of PIM；The pulse delay of the seasonal signal source 1 of calibration is fixed, and provides letter
Number pulse delay scope of source 2；The pulse delay of linear scan signal source 2, receiver test PIM response curves take its steady interval
The corresponding pulse delay of signal source 2 in interior midpoint is used as calibration value.
The step 5 is concretely comprised the following steps：Two pulse signals are amplified by amplifier turn into highpowerpulse, its work(respectively
Rate ＞ 43dBm, double-tone pulse is synthesized by combiner, and double-tone pulse frequency is F1 and F2；Duplexer has two filters of Tx and Rx
Ripple passage, keeps certain mutual isolation；Double-tone pulse is loaded onto measured piece, measured piece excitation by the Tx passages of duplexer
The passive intermodulation disturbing pulse of forward and backward, the disturbing pulse of fl transmission is designated as PIMT, PIMT and two-tone signal F1, F2 by
Low intermodulation load absorption；Reflection passive intermodulation pulse is designated as PIMR, and receiver, receiver life are entered by the Rx passages of duplexer
Entitled A channel；PIMR signals are received by frequency mixer first, and the local oscillator of frequency mixer is provided by local vibration source L0, the frequency with PIMR signals
Rate keeps certain frequency difference, the frequency difference to cause that the data-signal after mixing keeps fixed frequency, is intermediate-freuqncy signal, by arteries and veins
After rushing intermediate frequency conditioning, AD samplings are sent to, then signal amplitude is calculated by DSP module, Ji Suanji FPGA modules, compensated by middle frequency modulation
The signal amplitude error that reason and local oscillator cause, that is, complete to measure PIMR signal amplitudes.
On the basis of the above, the present invention use two-way synchronously adjustable clock as signal source, two-way pulse
Signal ingoing power amplification module ,+43dBm (being calculated with measured piece port) is amplified to by pulse signal.Arteries and veins after two-way amplification
Rush signal and form double-tone pulse by combiner, the pulse is loaded onto measured piece, and excitation measured signal produces PIM (passive intermodulation)
Interference.Reflected P IM signals are isolated by the duplexer and two-tone signal of instrument internal.Two-tone signal is tested by load absorption
PIM is received by the receiver being synchronized.
Schematic diagram of the invention is as shown in Figure 1：Three sources are produced by frequency reference：Signal source 1, signal source 2 and local vibration source
L0, signal source 1 produces signal frequency to be designated as f1, and signal source 2 produces signal frequency to be designated as f2, and local vibration source produces signal to be designated as L0.
At the same time, computer module produces the pulse gate signal that two-way is synchronously crossed, and its synchronizer can be tuned.Two-way pulse gate signal
It is adjustable to make the pulse signal that two-way frequency is f1 and f2 by after pulse shaper, being modulated with signal source 1 and signal source 2.
Two pulse signals are amplified by amplifier turn into highpowerpulse respectively, and power ＞ 43dBm synthesize by combiner
Double-tone pulse is formed, double-tone pulse frequency is F1 and F2.Duplexer has two filtering channels of Tx and Rx, keeps certain mutual
Isolation.Double-tone pulse is loaded onto measured piece by the Tx passages of duplexer, and measured piece encourages the passive intermodulation of forward and backward
Disturbing pulse, the disturbing pulse of fl transmission is designated as PIMT, and two-tone signal F1, F2 by low intermodulation load absorption.
Reflection passive intermodulation pulse is designated as PIMR, enters receiver by the Rx passages of duplexer, and receiver is named as A and led to
Road, with abbreviation receiver A.PIMR signals are received by frequency mixer first, and the local oscillator of frequency mixer is provided by local vibration source L0, are believed with PIMR
Number frequency keep certain frequency difference, this frequency difference to cause that the data-signal after mixing keeps fixed frequency, be intermediate frequency, pass through
Pulse intermediate frequency conditioning after, make a gift to someone to AD sampling, then by DSP module, computer FPGA module calculate signal amplitude, compensate in
The signal amplitude error that frequency modulation is managed and local oscillator causes, that is, complete to measure PIMR signal amplitudes.
In order to ensure the degree of accuracy of measurement, the present invention needs to carry out instrument the calibration of series, including：
(1) source frequency is calibrated.This is calibrated to instrument factory calibration, and its precision of frequency of use meter is up to 1e-6MHz@10MHz.
(2) source power calibration.This is calibrated to instrument factory calibration, method as shown in Fig. 2 being first shut off signal source 2, is closing
Road device original input port accesses load；Secondly pulse power meter is accessed in output port；Finally give a signal source 1, calibrated to
43dBm, now the pulse matching of signal source 1 finish.The calibration in source 2 can similarly be realized.Source power calibration schematic diagram is as shown in Figure 2.
(3) receiver calibration.This is calibrated to instrument factory calibration, specific method as shown in figure 3, standard signal source is direct
Access receiver A channel, record the interpolation of power and the signal source power of receiver detection, and when in use in computer and
FPGA module is modified.Receiver calibration schematic diagram is as shown in Figure 3.
(3) impulsive synchronization calibration, this is calibrated to factory calibration, instrument periodic calibration in use.Connected during calibration
Schematic diagram by passive intermodulation PIM standard components as shown in figure 4, access instrument, and rear end is loaded using low intermodulation and is connected, PIM marks
Quasi- part is an adjustable connector of PIM.The pulse delay of the seasonal signal source 1 of calibration is fixed, and provides the pulse delay model of signal source 2
Enclose.The pulse delay of linear scan signal source 2, receiver test PIM response curves take the midpoint correspondence in its steady respective bins
The pulse delay of signal source 2 as calibration value.Impulsive synchronization calibration schematic diagram is as shown in Figure 4.
It is used as circuit and microwave module, pulse modulated circuit, pulse shaper, impulsive synchronization and pulse gate production electricity
Road, pulse intermediate frequency modulate circuit, DSP processing modules can be used different circuit-modes to generate, and the present invention protects this pulse passive
Intermodulation testing instrument method of testing, therefore different circuit implementations all should be within the scope of the present invention.
The present invention replaces continuous wave two-tone signal using impulse modulation two-tone signal, receives passive mutual using pulse receiver
Adjust disturbing pulse.Under conditions of measured power+43dBm is ensured, the power of tester consumption is substantially reduced, therefore using this
The passive cross modulation test of system will have following two advantages：(1) tester volume can be greatly reduced, makes passive cross modulation test
Become hand-held to be possibly realized；(2) can be used battery to power, strengthen the portability and link adaptability of tester.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (5)
1. a kind of passive cross modulation test method of pulse regime, it is characterised in that comprise the following steps：
Step 1：Tester source frequency is calibrated；
Step 2：Tester source power is calibrated；
Step 3：Tester receiver calibration；
Step 4：Tester impulsive synchronization is calibrated；
Step 5：Three sources are produced by frequency reference：Signal source 1, signal source 2 and local vibration source L0, signal source 1 produce signal frequency
F1 is designated as, signal source 2 produces signal frequency to be designated as f2, and local vibration source produces signal to be designated as L0；Meanwhile, computer module produces two-way
Lock-out pulse gate signal, its synchronizer is tuned；Two-way pulse gate signal after pulse shaper, with signal source 1 and
Signal source 2 is modulated, and modulates the pulse signal that two-way frequency is f1 and f2；The subsequent step of the step 5 is：Two-way pulse is believed
Highpowerpulse is turned into by amplifier amplification number respectively, its power ＞ 43dBm synthesize double-tone pulse, double-tone arteries and veins by combiner
Frequency is rushed for F1 and F2；Duplexer has two filtering channels of Tx and Rx, keeps certain mutual isolation；Double-tone pulse is passed through
The Tx passages of duplexer are loaded onto measured piece, and measured piece encourages the passive intermodulation disturbing pulse of forward and backward, fl transmission
Disturbing pulse is designated as PIMT, and PIMT and two-tone signal F1, F2 are by low intermodulation load absorption；Reflection passive intermodulation pulse is designated as
PIMR, enters receiver, receiver is named as A channel by the Rx passages of duplexer；PIMR signals are received by frequency mixer first,
The local oscillator of frequency mixer is provided by local vibration source L0, after keeping certain frequency difference, the frequency difference to cause mixing with the frequency of PIMR signals
Data-signal keep fixed frequency, be intermediate-freuqncy signal, after being nursed one's health through extra pulse intermediate frequency, be sent to AD samplings, then by DSP moulds
Block, computer or FPGA module calculate signal amplitude, and the signal amplitude error that compensation is caused by intermediate frequency conditioning and local oscillator completes
PIMR signal amplitudes are measured.
2. the passive cross modulation test method of pulse regime as claimed in claim 1, it is characterised in that the step 1 it is specific
Step is：Factory calibration, frequency accuracy is 1e-6MHz@10MHz.
3. the passive cross modulation test method of pulse regime as claimed in claim 1, it is characterised in that the step 2 it is specific
Step is：Calibration signal source 1 and signal source 2；The calibration steps of signal source 1, is first shut off signal source 2, is inputted in combiner original
Access load in port；Secondly pulse power meter is accessed in output port；Last opening signal source 1, is calibrated to 43dBm, this
When the pulse matching of signal source 1 finish；The calibration steps of signal source 2：Signal source 1 is first shut off, is connect in the former input port of combiner
Enter load；Secondly pulse power meter is accessed in output port；Finally give a signal source 2, calibrated to 43dBm, now signal source 2
Pulse matching is finished.
4. the passive cross modulation test method of pulse regime as claimed in claim 1, it is characterised in that the step 3 it is specific
Step is：Standard signal source is directly accessed receiver A channel, the power of receiver detection and the difference of signal source power is recorded
Value, is modified by computer and FPGA module when in use.
5. the passive cross modulation test method of pulse regime as claimed in claim 1, it is characterised in that the step 4 it is specific
Step is：Passive intermodulation PIM standard components are accessed into instrument, and rear end is loaded using low intermodulation and is connected, and PIM standard components are one
The adjustable connectors of PIM；The pulse delay of the seasonal signal source 1 of calibration is fixed, and provides the pulse delay scope of signal source 2；Linearly sweep
The pulse delay of signal source 2 is retouched, receiver test PIM response curves take midpoint corresponding signal source 2 pulse in its steady interval
Time delay is used as calibration value.
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| CN104880621B (en) * | 2015-04-18 | 2018-06-05 | 南京纳特通信电子有限公司 | Self calibration passive cross modulation test instrument |
| CN105099586B (en) * | 2015-09-11 | 2017-11-21 | 中国电子科技集团公司第四十一研究所 | A kind of isolator passive cross modulation test device and method based on cavity filtering |
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| CN108107345A (en) * | 2017-12-12 | 2018-06-01 | 广州兴森快捷电路科技有限公司 | Passive cross modulation test device |
| CN108226753B (en) * | 2017-12-25 | 2020-08-18 | 广州兴森快捷电路科技有限公司 | Printed board passive intermodulation detection method, computer equipment and storage medium |
| CN108521309B (en) * | 2018-06-08 | 2020-09-01 | 中国电子科技集团公司第四十一研究所 | System and method for testing frequency sweep intermodulation distortion |
| CN108872956A (en) * | 2018-07-17 | 2018-11-23 | 中国人民解放军63895部队 | A kind of adjustable radar calibration source of delay distance |
| CN110022180A (en) * | 2019-04-18 | 2019-07-16 | 中国电子科技集团公司第五十四研究所 | A kind of passive high-precision intermodulation testing method |
| CN110221142B (en) * | 2019-05-09 | 2021-03-23 | 天津大学 | Nonlinear test positioning method and device based on passive intermodulation radiation field |
| CN110568283A (en) * | 2019-08-12 | 2019-12-13 | 中电科仪器仪表有限公司 | Active device intermodulation test device and test method |
| CN112162159A (en) * | 2020-09-08 | 2021-01-01 | 中电科仪器仪表有限公司 | Electromagnetic interference field test method based on signal identification |
| CN113138619B (en) * | 2021-03-25 | 2022-06-28 | 深圳市时代速信科技有限公司 | Signal processing method and system |
| CN116400111B (en) * | 2023-06-07 | 2023-10-03 | 中星联华科技（北京）有限公司 | Double-sound signal source |
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Effective date of registration: 20190308 Address after: 266000 No. 98 Xiangjiang Road, Huangdao District, Qingdao City, Shandong Province Patentee after: China Electronics Technology Instrument and Meter Co., Ltd. Address before: 266555 No. 98 Xiangjiang Road, Qingdao economic and Technological Development Zone, Shandong Patentee before: The 41st Institute of CETC |
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Address after: 266555 No. 98 Xiangjiang Road, Huangdao District, Qingdao City, Shandong Province Patentee after: CLP kesiyi Technology Co.,Ltd. Address before: 266000 No. 98 Xiangjiang Road, Huangdao District, Qingdao City, Shandong Province Patentee before: CHINA ELECTRONIC TECHNOLOGY INSTRUMENTS Co.,Ltd. |