CN104506258A - Passive intermodulation (PIM) test method for pulse system - Google Patents
Passive intermodulation (PIM) test method for pulse system Download PDFInfo
- Publication number
- CN104506258A CN104506258A CN201410662637.7A CN201410662637A CN104506258A CN 104506258 A CN104506258 A CN 104506258A CN 201410662637 A CN201410662637 A CN 201410662637A CN 104506258 A CN104506258 A CN 104506258A
- Authority
- CN
- China
- Prior art keywords
- pulse
- signal
- signal source
- frequency
- source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention provides a passive intermodulation (PIM) test method for a pulse system. Two paths of synchronously-adjustable pulse sources are taken as signal sources. Two paths of pulse signals enter a power amplification module, and are amplified to +43dBm (computed by using the port of a device under test). The two paths of pulse signals are combined into a double-tone pulse through a combiner, and the pulse is loaded to the device under test in order to excite a tested signal to generate PIM interference. A reflected PIM signal is isolated from the double-tone signal through a duplexer inside an instrument. The double-tone signal is absorbed by a load, and the tested PIM is received by a synchronized receiver. The scheme has the two advantages that (1) the size of a test instrument can be reduced greatly, and handheld PIM test becomes possible; and (2) power can be supplied by using batteries, so that the portability and environmental adaptability of the test instrument are enhanced.
Description
Technical field
The invention belongs to passive cross modulation test technical field, in particular a kind of passive cross modulation test method of pulse regime.
Background technology
In modern communication systems, transreceiver sensitivity is higher, and system uses power comparatively large, and therefore the interference of the linear passive such as cable, connector device non-linearity just can not be ignored.Testing the nonlinear tool of linear passive device is passive cross modulation test instrument, but most passive intermodulation instrument is all based on continuous wave system.The method of testing of passive intermodulation is generation two simple signals, is formed the two-tone signal of two-way+43dBm, be loaded on measured signal through duplexer after amplifier module amplifies by combiner unit.Two-tone signal encourages tested passive device to form PIM interference, and reverse PIM interference or forward direction PIM interference are isolated by duplexer and two-tone signal.Receiver receives PIM interference, detects its amplitude.Such system brings following Railway Project: one is that system is comparatively large heavier, is unfavorable for portable; Two is two-tone signals of systems radiate two-way+43dBm, therefore higher to the requirement of power supply, power amplifier, needs power supply, cannot use battery supply, the field adaptability of influential system.
Therefore, prior art existing defects, needs to improve.
Summary of the invention
Technical problem to be solved by this invention is for the deficiencies in the prior art, provides a kind of passive cross modulation test method of pulse regime.
Technical scheme of the present invention is as follows:
A passive cross modulation test method for pulse regime, wherein, comprises 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: produce three sources by frequency reference: signal source 1, signal source 2 and local vibration source L0, signal source 1 produces signal frequency and is designated as f1, and signal source 2 produces signal frequency and is designated as f2, and local vibration source produces signal and is designated as L0; Meanwhile, computer module produces two-way lock-out pulse gate signal, and its synchronizer carries out tuning; Two-way pulse gate signal, after pulse shaper, is modulated with signal source 1 and signal source 2, modulates the pulse signal that two-way frequency is f1 and f2.
The passive cross modulation test method of described pulse regime, wherein, the concrete steps of described step 1 are: factory calibration, and frequency accuracy is 1e-6MHz@10MHz.
The passive cross modulation test method of described pulse regime, wherein, the concrete steps of described step 2 are: calibration signal source 1 and signal source 2; The calibration steps of signal source 1, first shutdown signal source 2, in mixer former input port access load; Secondly at output port access pulse power meter; Last opening signal source 1, is calibrated to 43dBm, and now signal source 1 pulse matching is complete; The calibration steps of signal source 2: first shutdown signal source 1, in mixer former input port access load; Secondly at output port access pulse power meter; Finally give a signal source 2, calibrated to 43dBm, now signal source 2 pulse matching is complete.
The passive cross modulation test method of described pulse regime, wherein, the concrete steps of described step 3 are: standard signal source is directly accessed receiver A channel, and the power of record receiver detection and the difference of signal source power, revised by computer and FPGA module in use.
The passive cross modulation test method of described pulse regime, wherein, the concrete steps of described step 4 are: by passive intermodulation PIM standard component access instrument, and rear end uses low intermodulation load to be connected, and PIM standard component is the adjustable connector of a PIM; The pulse delay calibrating seasonal signal source 1 is fixed, and provides signal source 2 pulse delay scope; Linear scan signal source 2 pulse delay, receiver test PIM response curve, gets signal source 2 pulse delay corresponding to the interior mid point in its meadow as calibration value.
The passive cross modulation test method of described pulse regime, wherein, the concrete steps of described step 5 are: two pulse signals is amplified by amplifier respectively and become highpowerpulse, its power > 43dBm, through the pulse of mixer synthesis double-tone, double-tone pulse frequency is F1 and F2; Duplexer has Tx and Rx two filtering channels, keeps certain mutual isolation; Double-tone pulse is loaded on measured piece through the Tx passage of duplexer, measured piece excitation forward direction and reverse passive intermodulation disturbing pulse, and the disturbing pulse of fl transmission is designated as PIMT, and PIMT and two-tone signal F1, F2 are absorbed by low intermodulation load; The pulse of reflection passive intermodulation is designated as PIMR, and the Rx passage through duplexer enters receiver, receiver called after A channel; First PIMR signal is received by frequency mixer, the local oscillator of frequency mixer is provided by local vibration source L0, certain frequency difference is kept with the frequency of PIMR signal, the frequency that described frequency difference makes the data-signal after mixing keep fixing is intermediate-freuqncy signal, after the conditioning of extra pulse intermediate frequency, deliver to AD sampling, again by DSP module, computer FPGA module calculate signal amplitude, compensate and nursed one's health and the signal amplitude error that causes of local oscillator by intermediate frequency, namely complete and PIMR signal amplitude is measured.
The present invention uses pulse modulation two-tone signal to replace continuous wave two-tone signal, uses pulse receiver to receive passive intermodulation disturbing pulse.Under the condition ensureing measured power+43dBm, greatly reduce the power that tester consumes, therefore the passive cross modulation test of this system is adopted will to have following two advantages: (1) can reduce tester volume greatly, and making passive cross modulation test become hand-hold type becomes possibility; (2) can powered battery be used, strengthen portability and the link adaptability of tester.
Accompanying drawing explanation
Fig. 1 is the passive cross modulation test Method And Principle figure 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 impulsive synchronization calibrating principle figure in the inventive method.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
A passive cross modulation test method for pulse regime, wherein, comprises 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: produce three sources by frequency reference: signal source 1, signal source 2 and local vibration source L0, signal source 1 produces signal frequency and is designated as f1, and signal source 2 produces signal frequency and is designated as f2, and local vibration source produces signal and is designated as L0; Meanwhile, computer module produces two-way lock-out pulse gate signal, and its synchronizer carries out tuning; Two-way pulse gate signal, after pulse shaper, is modulated with signal source 1 and signal source 2, modulates the pulse signal that two-way frequency is f1 and f2.
The concrete steps of described step 1 are: factory calibration, and frequency accuracy is 1e-6MHz@10MHz.
The concrete steps of described step 2 are: calibration signal source 1 and signal source 2; The calibration steps of signal source 1, first shutdown signal source 2, in mixer former input port access load; Secondly at output port access pulse power meter; Last opening signal source 1, is calibrated to 43dBm, and now signal source 1 pulse matching is complete; The calibration steps of signal source 2: first shutdown signal source 1, in mixer former input port access load; Secondly at output port access pulse power meter; Finally give a signal source 2, calibrated to 43dBm, now signal source 2 pulse matching is complete.
The concrete steps of described step 3 are: standard signal source is directly accessed receiver A channel, and the power of record receiver detection and the difference of signal source power, revised by computer and FPGA module in use.
The concrete steps of described step 4 are: by passive intermodulation PIM standard component access instrument, and rear end uses low intermodulation load to be connected, and PIM standard component is the adjustable connector of a PIM; The pulse delay calibrating seasonal signal source 1 is fixed, and provides signal source 2 pulse delay scope; Linear scan signal source 2 pulse delay, receiver test PIM response curve, gets signal source 2 pulse delay corresponding to the interior mid point in its meadow as calibration value.
The concrete steps of described step 5 are: two pulse signals is amplified by amplifier respectively and become highpowerpulse, its power > 43dBm, and through the pulse of mixer synthesis double-tone, double-tone pulse frequency is F1 and F2; Duplexer has Tx and Rx two filtering channels, keeps certain mutual isolation; Double-tone pulse is loaded on measured piece through the Tx passage of duplexer, measured piece excitation forward direction and reverse passive intermodulation disturbing pulse, and the disturbing pulse of fl transmission is designated as PIMT, and PIMT and two-tone signal F1, F2 are absorbed by low intermodulation load; The pulse of reflection passive intermodulation is designated as PIMR, and the Rx passage through duplexer enters receiver, receiver called after A channel; First PIMR signal is received by frequency mixer, the local oscillator of frequency mixer is provided by local vibration source L0, certain frequency difference is kept with the frequency of PIMR signal, the frequency that described frequency difference makes the data-signal after mixing keep fixing is intermediate-freuqncy signal, after the conditioning of extra pulse intermediate frequency, deliver to AD sampling, again by DSP module, computer FPGA module calculate signal amplitude, compensate and nursed one's health and the signal amplitude error that causes of local oscillator by intermediate frequency, namely complete and PIMR signal amplitude is measured.
On the basis of the above, the clock that the present invention uses two-way synchronously adjustable is as signal source, and two pulse signals ingoing power amplification module, is amplified to+43dBm (calculating with measured piece port) by pulse signal.Pulse signal after two-way amplifies forms double-tone pulse through mixer, and this pulse is loaded on measured piece, and excitation measured signal produces PIM (passive intermodulation) interference.Reflected P IM signal is through the duplexer of instrument internal and two-tone signal isolation.Two-tone signal is absorbed by load, and tested PIM is received by the receiver be synchronized.
Schematic diagram of the present invention is as shown in Figure 1: produce three sources by frequency reference: signal source 1, signal source 2 and local vibration source L0, signal source 1 produces signal frequency and is designated as f1, and signal source 2 produces signal frequency and is designated as f2, and local vibration source produces signal and is designated as L0.Meanwhile, computer module produces the pulse gate signal of the synchronous mistake of two-way, and its synchronizer can be tuning.Two-way pulse gate signal, after pulse shaper, is modulated with signal source 1 and signal source 2, can modulate the pulse signal that two-way frequency is f1 and f2.
Two pulse signals is amplified by amplifier respectively and is become highpowerpulse, power > 43dBm, and form double-tone pulse through mixer synthesis, double-tone pulse frequency is F1 and F2.Duplexer has Tx and Rx two filtering channels, keeps certain mutual isolation.Double-tone pulse is loaded on measured piece through the Tx passage of duplexer, and measured piece excitation forward direction and reverse passive intermodulation disturbing pulse, the disturbing pulse of fl transmission is designated as PIMT, and two-tone signal F1, F2 are absorbed by low intermodulation load.
The pulse of reflection passive intermodulation is designated as PIMR, and the Rx passage through duplexer enters receiver, receiver called after A channel, with abbreviation receiver A.First PIMR signal is received by frequency mixer, the local oscillator of frequency mixer is provided by local vibration source L0, certain frequency difference is kept with the frequency of PIMR signal, the frequency that this frequency difference makes the data-signal after mixing keep fixing is intermediate frequency, after the conditioning of extra pulse intermediate frequency, the AD that makes a gift to someone samples, again by DSP module, computer FPGA module calculate signal amplitude, compensate and nursed one's health and the signal amplitude error that causes of local oscillator by intermediate frequency, namely complete and PIMR signal amplitude is measured.
In order to ensure the accuracy measured, the present invention needs calibration instrument being carried out to series, comprising:
(1) source frequency calibration.This is calibrated to instrument factory calibration, and its precision of frequency of utilization meter can reach 1e-6MHz@10MHz.
(2) source power calibration.This is calibrated to instrument factory calibration, and as shown in Figure 2, first shutdown signal source 2, in mixer former input port access load for method; Secondly at output port access pulse power meter; Finally give a signal source 1, calibrated to 43dBm, now signal source 1 pulse matching is complete.In like manner can realize the calibration in source 2.Source power calibration schematic diagram as shown in Figure 2.
(3) receiver calibration.This is calibrated to instrument factory calibration, and standard signal source as shown in Figure 3, is directly accessed receiver A channel by concrete grammar, the power of record receiver detection and the interpolation of signal source power, and revises at computer and FPGA module in use.Receiver calibration schematic diagram as shown in Figure 3.
(3) impulsive synchronization calibration, this is calibrated to factory calibration, and instrument is periodic calibration in use.During calibration, connection diagram as shown in Figure 4, and by passive intermodulation PIM standard component access instrument, and rear end uses low intermodulation load to be connected, and PIM standard component is the adjustable connector of a PIM.The pulse delay calibrating seasonal signal source 1 is fixed, and provides signal source 2 pulse delay scope.Linear scan signal source 2 pulse delay, receiver test PIM response curve, gets signal source 2 pulse delay corresponding to mid point in its steady respective bins as calibration value.Impulsive synchronization calibration schematic diagram as shown in Figure 4.
As circuit and microwave module; pulse modulated circuit, pulse shaper, impulsive synchronization and pulse gate production circuit, pulse intermediate frequency modulate circuit, DSP processing module can use different circuit-mode to generate; and the present invention protects this pulse passive cross modulation test instrument method of testing, therefore different circuit implementations all should within scope.
The present invention uses pulse modulation two-tone signal to replace continuous wave two-tone signal, uses pulse receiver to receive passive intermodulation disturbing pulse.Under the condition ensureing measured power+43dBm, greatly reduce the power that tester consumes, therefore the passive cross modulation test of this system is adopted will to have following two advantages: (1) can reduce tester volume greatly, and making passive cross modulation test become hand-hold type becomes possibility; (2) can powered battery be used, strengthen portability and the link adaptability of tester.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection range that all should belong to claims of the present invention.
Claims (6)
1. a passive cross modulation test method for pulse regime, is characterized 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: produce three sources by frequency reference: signal source 1, signal source 2 and local vibration source L0, signal source 1 produces signal frequency and is designated as f1, and signal source 2 produces signal frequency and is designated as f2, and local vibration source produces signal and is designated as L0; Meanwhile, computer module produces two-way lock-out pulse gate signal, and its synchronizer carries out tuning; Two-way pulse gate signal, after pulse shaper, is modulated with signal source 1 and signal source 2, modulates the pulse signal that two-way frequency is f1 and f2.
2. the passive cross modulation test method of pulse regime as claimed in claim 1, it is characterized in that, the concrete steps of described step 1 are: factory calibration, and frequency accuracy is 1e-6MHz@10MHz.
3. the passive cross modulation test method of pulse regime as claimed in claim 1, it is characterized in that, the concrete steps of described step 2 are: calibration signal source 1 and signal source 2; The calibration steps of signal source 1, first shutdown signal source 2, in mixer former input port access load; Secondly at output port access pulse power meter; Last opening signal source 1, is calibrated to 43dBm, and now signal source 1 pulse matching is complete; The calibration steps of signal source 2: first shutdown signal source 1, in mixer former input port access load; Secondly at output port access pulse power meter; Finally give a signal source 2, calibrated to 43dBm, now signal source 2 pulse matching is complete.
4. the passive cross modulation test method of pulse regime as claimed in claim 1, it is characterized in that, the concrete steps of described step 3 are: standard signal source is directly accessed receiver A channel, the power of record receiver detection and the difference of signal source power, revised by computer and FPGA module in use.
5. the passive cross modulation test method of pulse regime as claimed in claim 1, it is characterized in that, the concrete steps of described step 4 are: by passive intermodulation PIM standard component access instrument, and rear end uses low intermodulation load to be connected, and PIM standard component is the adjustable connector of a PIM; The pulse delay calibrating seasonal signal source 1 is fixed, and provides signal source 2 pulse delay scope; Linear scan signal source 2 pulse delay, receiver test PIM response curve, gets signal source 2 pulse delay corresponding to the interior mid point in its meadow as calibration value.
6. the passive cross modulation test method of pulse regime as claimed in claim 1, it is characterized in that, the concrete steps of described step 5 are: two pulse signals is amplified by amplifier respectively and become highpowerpulse, its power > 43dBm, through the pulse of mixer synthesis double-tone, double-tone pulse frequency is F1 and F2; Duplexer has Tx and Rx two filtering channels, keeps certain mutual isolation; Double-tone pulse is loaded on measured piece through the Tx passage of duplexer, measured piece excitation forward direction and reverse passive intermodulation disturbing pulse, and the disturbing pulse of fl transmission is designated as PIMT, and PIMT and two-tone signal F1, F2 are absorbed by low intermodulation load; The pulse of reflection passive intermodulation is designated as PIMR, and the Rx passage through duplexer enters receiver, receiver called after A channel; First PIMR signal is received by frequency mixer, the local oscillator of frequency mixer is provided by local vibration source L0, certain frequency difference is kept with the frequency of PIMR signal, the frequency that described frequency difference makes the data-signal after mixing keep fixing is intermediate-freuqncy signal, after the conditioning of extra pulse intermediate frequency, deliver to AD sampling, again by DSP module, computer FPGA module calculate signal amplitude, compensate and nursed one's health and the signal amplitude error that causes of local oscillator by intermediate frequency, namely complete and PIMR signal amplitude is measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410662637.7A CN104506258B (en) | 2014-11-04 | 2014-11-04 | A kind of passive cross modulation test method of pulse regime |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410662637.7A CN104506258B (en) | 2014-11-04 | 2014-11-04 | A kind of passive cross modulation test method of pulse regime |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104506258A true CN104506258A (en) | 2015-04-08 |
| CN104506258B CN104506258B (en) | 2017-07-11 |
Family
ID=52947981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410662637.7A Active CN104506258B (en) | 2014-11-04 | 2014-11-04 | A kind of passive cross modulation test method of pulse regime |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104506258B (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880621A (en) * | 2015-04-18 | 2015-09-02 | 南京纳特通信电子有限公司 | Self calibration passive intermodulation tester |
| CN105099586A (en) * | 2015-09-11 | 2015-11-25 | 中国电子科技集团公司第四十一研究所 | Passive isolator intermodulation test device based on chamber filtering and method |
| CN106130669A (en) * | 2016-07-05 | 2016-11-16 | 中国电子科技集团公司第四十研究所 | A kind of microwave amplifier hot reflection function test device and method |
| CN107037268A (en) * | 2017-05-23 | 2017-08-11 | 中国电子科技集团公司第四十研究所 | A kind of scattering parameter test circuit and method suitable for long delay device |
| 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 |
| CN108226753A (en) * | 2017-12-25 | 2018-06-29 | 广州兴森快捷电路科技有限公司 | Detection method, computer equipment and the storage medium of printed board passive intermodulation |
| CN108521309A (en) * | 2018-06-08 | 2018-09-11 | 中国电子科技集团公司第四十研究所 | A kind of frequency sweep intermodulation distortion test System and method for |
| 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 |
| CN110221142A (en) * | 2019-05-09 | 2019-09-10 | 天津大学 | A kind of method and device of the non-linear test positioning 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 |
| CN113138619A (en) * | 2021-03-25 | 2021-07-20 | 深圳市时代速信科技有限公司 | Signal processing method and system |
| CN116400111A (en) * | 2023-06-07 | 2023-07-07 | 中星联华科技（北京）有限公司 | Double-sound signal source |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901876A (en) * | 2012-11-13 | 2013-01-30 | 哈尔滨工业大学 | Method for measuring inter-modulation spectral lines by using network analyzer based on multi-voice excited step recovery diode (SRD) pulse generator |
| CN103675448B (en) * | 2013-12-16 | 2017-04-19 | 中国电子科技集团公司第四十一研究所 | Vector measurement method for passive intermodulation interference |
-
2014
- 2014-11-04 CN CN201410662637.7A patent/CN104506258B/en active Active
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104880621A (en) * | 2015-04-18 | 2015-09-02 | 南京纳特通信电子有限公司 | Self calibration passive intermodulation tester |
| CN105099586A (en) * | 2015-09-11 | 2015-11-25 | 中国电子科技集团公司第四十一研究所 | Passive isolator intermodulation test device based on chamber filtering and method |
| CN106130669A (en) * | 2016-07-05 | 2016-11-16 | 中国电子科技集团公司第四十研究所 | A kind of microwave amplifier hot reflection function test device and method |
| CN107037268A (en) * | 2017-05-23 | 2017-08-11 | 中国电子科技集团公司第四十研究所 | A kind of scattering parameter test circuit and method suitable for long delay device |
| CN107037268B (en) * | 2017-05-23 | 2019-04-09 | 中国电子科技集团公司第四十一研究所 | A kind of scattering parameter test circuit and method suitable for long delay device |
| 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 |
| CN108226753A (en) * | 2017-12-25 | 2018-06-29 | 广州兴森快捷电路科技有限公司 | Detection method, computer equipment and the storage medium of printed board passive intermodulation |
| 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 |
| CN108521309A (en) * | 2018-06-08 | 2018-09-11 | 中国电子科技集团公司第四十研究所 | A kind of frequency sweep intermodulation distortion test System and method for |
| 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 |
| CN110221142A (en) * | 2019-05-09 | 2019-09-10 | 天津大学 | A kind of method and device of the non-linear test positioning 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 |
| CN113138619A (en) * | 2021-03-25 | 2021-07-20 | 深圳市时代速信科技有限公司 | Signal processing method and system |
| 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 |
| CN116400111A (en) * | 2023-06-07 | 2023-07-07 | 中星联华科技（北京）有限公司 | Double-sound signal source |
| CN116400111B (en) * | 2023-06-07 | 2023-10-03 | 中星联华科技（北京）有限公司 | Double-sound signal source |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104506258B (en) | 2017-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104506258A (en) | Passive intermodulation (PIM) test method for pulse system | |
| CN103675448B (en) | Vector measurement method for passive intermodulation interference | |
| CN102156139B (en) | Method and system for measuring passive intermodulation generation point of microwave device by using electromagnetic wave phase | |
| CN102752061B (en) | Device and method for generating reference signal of phase-locked amplifier of millimeter wave attenuation measurement system | |
| CN103684490A (en) | Passive intermodulation outlier quick locating method based on vector network analyzer | |
| CN107124233B (en) | Device and method for realizing broadband passive intermodulation measurement by adopting electric bridge combined with filter | |
| CN102780535A (en) | Intermediate-frequency detection based vector network analyzer power control method | |
| CN103269253A (en) | Passive intermodulation fault location detection circuit structure based on multiple order digital sweep frequency | |
| CN104880621B (en) | Self calibration passive cross modulation test instrument | |
| CN103873157A (en) | Spectrum analyzer having zero frequency inhibition function | |
| CN107110955A (en) | Method for calibrating radar system | |
| CN105738708A (en) | Short wave antenna tuner insertion loss measuring device and method | |
| CN104101807B (en) | Self intermodulation inhibition method for transmission passive intermodulation (PIM) test | |
| CN100473996C (en) | Apparatus for detecting linear index of power amplifier | |
| CN103647612B (en) | A kind of attenuation measurement device for Wave guide system | |
| CN108983174A (en) | Weather radar integral test system | |
| CN103227687A (en) | Passive multi-step intermodulation tester | |
| CN105141381A (en) | Electronic equipment receiver noise coefficient test device and test method | |
| CN202998092U (en) | Measuring instrument | |
| CN103884922A (en) | Measuring device and method for Terahertz vector field shape of single receiver | |
| CN103746736B (en) | 14 channel fiber data transmission TR equipment complex test systems | |
| CN203479903U (en) | Universal spectrum analyzer tracking source system | |
| CN103178860A (en) | Electromagnetic detecting system capable of eliminating background noise and method for eliminating background noise | |
| CN203193645U (en) | Passive intermodulation fault location detection circuit structure based on multi-order digital sweep frequency | |
| CN101216526A (en) | Feedforward loop circuit synchronous detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
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 |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
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. |