CN204741459U - Intermodulation appearance that possesses real -time transmit power monitoring function - Google Patents
Intermodulation appearance that possesses real -time transmit power monitoring function Download PDFInfo
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- CN204741459U CN204741459U CN201520489767.5U CN201520489767U CN204741459U CN 204741459 U CN204741459 U CN 204741459U CN 201520489767 U CN201520489767 U CN 201520489767U CN 204741459 U CN204741459 U CN 204741459U
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Abstract
The utility model discloses an intermodulation appearance that possesses real -time transmit power monitoring function, including monitor, industrial computer, four signal sources, two power amplifier, two close way wave filter, three coupler, power meter, switch and receiver, the utility model discloses intermodulation assay appearance is compared with traditional intermodulation assay appearance system, has increased by two signal sources and two couplers at receive channel, and the transmit frequency of two signal sources is not in the frequency acceptance band of intermodulation appearance, and the transmit frequency of two signal sources and range prestore in the system, and the range of these two signal sources detects in test elder generation at every turn to the result compares with prestoring. The reliability of real time monitoring receive channel's state assurance test is detected through the launched power to these two signal sources. Third coupler and power meter have been increased at the transmission passageway, through the launched power of third coupler and power meter real time monitoring transmission passageway, the further reliability of guaranteeing the test.
Description
Technical field
The utility model relates to the technical field of measurement and test of passive device, particularly relates to a kind of intermodulation instrument possessing real time emission power monitoring function.
Background technology
Passive intermodulation analysis is a kind of testing equipment of the passive intermodulation of a kind of testing passive device and system, and important technological parameters has measured power, system residual intermodulation, operational frequency bandwidth etc.
Traditional intermodulation analyzer as shown in Figure 1, the frequency in the first signal source and secondary signal source is controlled by industrial computer, after the first power amplifier and the second power amplifier amplify, export first close path filter, after tested first test lead closing path filter outputs to measured device, can test the reverse of measured piece and forward direction intermodulation value.Receive many employing receiver test inter-modulated signal.Traditional intermodulation instrument can not monitor the operating state of receive path in real time when testing, when the LNA of receiver or switch break down, inter-modulated signal can not enter receiver or can not correctly test, and instrument can't report an error, final testing result and actual value deviation very large.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, provides a kind of intermodulation instrument possessing real time emission power monitoring function.
The purpose of this utility model is achieved through the following technical solutions: a kind of intermodulation instrument possessing real time emission power monitoring function, comprises monitor, industrial computer, the first signal source, secondary signal source, the 3rd signal source, the 4th signal source, the first power amplifier, the second power amplifier, the first conjunction path filter, the second conjunction path filter, the first coupler, the second coupler, the 3rd coupler, power meter, switch and receiver; Wherein, described monitor, the first signal source, secondary signal source, the first power amplifier, the second power amplifier, power meter, receiver, power meter are all connected with industrial computer with switch; Described first signal source connects the first power amplifier, and the output of the first power amplifier connects the first transmitting input port Tx1 that first closes path filter; Described secondary signal source connects the second power amplifier, and the output of the second power amplifier connects the second transmitting input port Tx2 that first closes path filter; First test port closing path filter connects the 3rd coupler, and the output of the 3rd coupler connects measured piece, and the coupled end of the 3rd coupler connects power meter; First closes the input that the reception delivery outlet Rx of path filter connects the first coupler, the first gating branch road of the output connecting valve of the first coupler, the first coupler coupled end connect the 3rd signal source; The described second transmitting delivery outlet Tx closing path filter connects load, test port connects measured piece, receive the input that delivery outlet Rx connects the second coupler, the second gating branch road of the output connecting valve of the second coupler, the second coupler coupled end connect the 4th signal source; The common port of switch connects receiver.
The beneficial effects of the utility model are: the utility model intermodulation analyzer is compared with traditional intermodulation analyzer system, add the 3rd signal source, the 4th signal source, the first coupler and the second coupler at receive path, the transmission frequency of the 3rd signal source and the 4th signal source is not in the frequency acceptance band of intermodulation instrument.Transmission frequency and the amplitude of the 3rd signal source and the 4th signal source prestore in systems in which.Each test first detects the amplitude of these two signal sources, and with the results contrast that prestores.The reliability of test is ensured by the state transmitted power of the 3rd signal source and the 4th signal source being detected to monitoring receive path in real time.Add the 3rd coupler and power meter at transmission channel, monitored the transmitted power of transmission channel by the 3rd coupler and power meter in real time, ensure the reliability of test further.
Accompanying drawing explanation
Fig. 1 is traditional intermodulation analyzer structure chart;
Fig. 2 is the intermodulation instrument structure chart that the utility model possesses real time emission power monitoring function.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 2, a kind of intermodulation instrument possessing real time emission power monitoring function of the utility model, comprises monitor, industrial computer, the first signal source, secondary signal source, the 3rd signal source, the 4th signal source, the first power amplifier, the second power amplifier, the first conjunction path filter, the second conjunction path filter, the first coupler, the second coupler, the 3rd coupler, power meter, switch and receiver; Wherein, described monitor, the first signal source, secondary signal source, the first power amplifier, the second power amplifier, power meter, receiver, power meter are all connected with industrial computer with switch; Described first signal source connects the first power amplifier, and the output of the first power amplifier connects the first transmitting input port Tx1 that first closes path filter; Described secondary signal source connects the second power amplifier, and the output of the second power amplifier connects the second transmitting input port Tx2 that first closes path filter; First test port closing path filter connects the 3rd coupler, and the output of the 3rd coupler connects measured piece, and the coupled end of the 3rd coupler connects power meter; First closes the input that the reception delivery outlet Rx of path filter connects the first coupler, the first gating branch road of the output connecting valve of the first coupler, the first coupler coupled end connect the 3rd signal source; The described second transmitting delivery outlet Tx closing path filter connects load, test port connects measured piece, receive the input that delivery outlet Rx connects the second coupler, the second gating branch road of the output connecting valve of the second coupler, the second coupler coupled end connect the 4th signal source; The common port of switch connects receiver.
The tranmitting frequency of described first signal source is f1, and the tranmitting frequency in secondary signal source is f2, and the receive frequency of receiver is f3, and meets f3=2 f1-f2; Described 3rd signal source, the 4th signal source tranmitting frequency are different, and can not drop on emission band and the frequency acceptance band of intermodulation instrument; The high order harmonic component of the 3rd signal source, the 4th signal source and the spuious frequency acceptance band that can not drop on intermodulation instrument, can not produce interference to intermodulation testing result like this; The transmitting power of the 3rd signal source, the 4th signal source is arranged on-80dB+/-3dB scope.3 rank intermodulation of described 3rd coupler need lower than-125dBm coupler, and the degree of coupling is greater than 40dB.The precision of such guarantee intermodulation testing.
Industrial computer by the frequency of the 3rd signal source, the 4th signal source and amplitude record in systems in which, first detect the amplitude of the 3rd signal source, the 4th signal source when starting to test at every turn, and the results contrast preserved in system, if difference is less than +/-1dB, then think that the receive path of system is working properly, otherwise report an error.Concrete testing process is as follows:
1: test starts, and industrial computer first controls receiver and switch, measure the power output of the 3rd signal source.
2: the power output of the 3rd signal source measured is compared with system file record, if test result and record close, then show that this receive path is working properly, otherwise then report an error.
3: industrial computer controls receiver and switch, measure the power output of the 4th signal source.
4: the power output of the 4th signal source measured is compared with system file record, if test result and record close, then show that this receive path is working properly, otherwise then report an error.
5: the tranmitting frequency that industrial computer controls the first signal source is f1 and opens transmission, by controlling the multiplication factor of the first power amplifier, regulate the transmitted power of the first power amplifier.
6: industrial computer elastic calibration device reads the 3rd coupler and exports, and calculate the first conjunction path filter actual power, by the power ratio of calculated value and needs comparatively, if error is less than 0.3dB, then think and export normally, otherwise regulate the multiplication factor of the first power amplifier until error is less than 0.3dB.
7: the tranmitting frequency that industrial computer controls secondary signal source is f2 and opens transmission, by controlling the multiplication factor of the second power amplifier, regulates the transmitted power of the second power amplifier.
8: industrial computer elastic calibration device reads the 3rd coupler and exports, and calculate the first conjunction path filter actual power, by the power ratio of calculated value and needs comparatively, if error is less than 0.3dB, then think and export normally, otherwise the multiplication factor of regulating power second amplifier is until error is less than 0.3dB.
9: the receive frequency that industrial computer arranges receiver is 2*f1-f2, industrial computer arranges switching over to the intermodulation passage wanting to test, and measures the inter-modulated signal amplitude received.
10: the tranmitting frequency f2 changing the tranmitting frequency f1 of the first signal source, secondary signal source, repeat above step 5-9.Test all Frequency points that need test.
11: measure and connect bundle, preserve test result.
Claims (1)
1. one kind possesses the intermodulation instrument of real time emission power monitoring function, it is characterized in that, comprise monitor, industrial computer, the first signal source, secondary signal source, the 3rd signal source, the 4th signal source, the first power amplifier, the second power amplifier, the first conjunction path filter, the second conjunction path filter, the first coupler, the second coupler, the 3rd coupler, power meter, switch and receiver; Wherein, described monitor, the first signal source, secondary signal source, the first power amplifier, the second power amplifier, power meter, receiver, power meter are all connected with industrial computer with switch; Described first signal source connects the first power amplifier, and the output of the first power amplifier connects the first transmitting input port Tx1 that first closes path filter; Described secondary signal source connects the second power amplifier, and the output of the second power amplifier connects the second transmitting input port Tx2 that first closes path filter; First test port closing path filter connects the 3rd coupler, and the output of the 3rd coupler connects measured piece, and the coupled end of the 3rd coupler connects power meter; First closes the input that the reception delivery outlet Rx of path filter connects the first coupler, the first gating branch road of the output connecting valve of the first coupler, the first coupler coupled end connect the 3rd signal source; The described second transmitting delivery outlet Tx closing path filter connects load, test port connects measured piece, receive the input that delivery outlet Rx connects the second coupler, the second gating branch road of the output connecting valve of the second coupler, the second coupler coupled end connect the 4th signal source; The common port of switch connects receiver.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520489767.5U CN204741459U (en) | 2015-07-03 | 2015-07-03 | Intermodulation appearance that possesses real -time transmit power monitoring function |
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| CN201520489767.5U CN204741459U (en) | 2015-07-03 | 2015-07-03 | Intermodulation appearance that possesses real -time transmit power monitoring function |
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| CN204741459U true CN204741459U (en) | 2015-11-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253997A (en) * | 2016-08-10 | 2016-12-21 | 杭州紫光网络技术有限公司 | A kind of multiband intersection cross modulation test system |
| WO2022247474A1 (en) * | 2021-05-24 | 2022-12-01 | 中兴通讯股份有限公司 | Semiconductor material characteristic representation testing method and system thereof |
-
2015
- 2015-07-03 CN CN201520489767.5U patent/CN204741459U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253997A (en) * | 2016-08-10 | 2016-12-21 | 杭州紫光网络技术有限公司 | A kind of multiband intersection cross modulation test system |
| CN106253997B (en) * | 2016-08-10 | 2018-10-19 | 杭州紫光网络技术有限公司 | A kind of multiband intersection cross modulation test system |
| WO2022247474A1 (en) * | 2021-05-24 | 2022-12-01 | 中兴通讯股份有限公司 | Semiconductor material characteristic representation testing method and system thereof |
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