CN106771712A - A kind of frequency converter phase conformance testing device and method - Google Patents
A kind of frequency converter phase conformance testing device and method Download PDFInfo
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- CN106771712A CN106771712A CN201611036833.9A CN201611036833A CN106771712A CN 106771712 A CN106771712 A CN 106771712A CN 201611036833 A CN201611036833 A CN 201611036833A CN 106771712 A CN106771712 A CN 106771712A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
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Abstract
The present invention proposes a kind of frequency converter phase conformance testing device, will test by frequency converter frequency converter and refer to frequency converter as calibration, phase equalization test is carried out to test frequency converter to be measured；Internal motivation uses same frequency reference data, the first signal source that signal is divided into two-way by power splitter, acts on the rf inputs mouthful of calibration frequency converter and reference/test frequency converter；Signal is divided into two-way by secondary signal source by power splitter, and the local oscillator for acting on calibration frequency converter and reference/test frequency converter drives port；The output for calibrating frequency converter accesses the first receiver, the second receiver is accessed with reference to the output of/test frequency converter, the reception signal of the first receiver and the second receiver is down-converted to by IF-FRE by local vibration source, then by digital sample, Vector operation treatment, the complex signal that will be obtained is transmitted to computer module to intermediate-freuqncy signal.The present invention is not only restricted to frequency converter internal structure, and calibration process is simple, and hardware cost is lower.
Description
Technical field
The present invention relates to technical field of measurement and test, more particularly to a kind of frequency converter phase conformance testing device further relates to one
Plant frequency converter phase equalization method of testing.
Background technology
Microwave converter is applied to the electronics such as radar, communication, electronic reconnaissance and microwave and millimeter wave tester, realizes
Frequency transform function, is the important component of microwave and millimeter wave system, and the quality of its characteristic directly affects the performance of equipment or instrument.
In radar, communication, the signal reception processing of tester, it is necessary to carry out big bandwidth processing, the phase for frequency converter is flat
Degree, group delay are all required.But input, local oscillator and the intermediate frequency port work due to frequency converter are over different frequencies, it is impossible to
Measured using vector network analyzer as other microwave components.
The phase test of existing frequency converter, vector calibration or scalar+phase are carried out usually using vector network analyzer
Calibration is tested.Both modes are required for carrying out frequency transformation setting to the lattice gauge tested, with the signal for ensureing to receive
Can compare, and then increased the complexity of connect setting.And both mode calibration steps are various, vector calibration is at least
11 steps, scalar+phase at least 9 steps, calibration process is complicated, easily causes operational error.
In face of producing in enormous quantities effect can be all influenceed with manufacture, the connection and calibration of the phase test complexity of existing frequency converter
Rate.
The content of the invention
To solve above-mentioned deficiency of the prior art, the present invention proposes a kind of frequency converter phase conformance testing device and side
Method.
The technical proposal of the invention is realized in this way：
A kind of frequency converter phase conformance testing device, will test by frequency converter as calibration frequency converter and with reference to become
Frequency device, phase equalization test is carried out to test frequency converter to be measured；Internal motivation uses same frequency reference data, and inside is swashed
1 local vibration source and 2 independent signal sources, i.e. the first signal source and secondary signal source are encouraged；
Signal is divided into two-way by the first signal source by power splitter, acts on calibration frequency converter and reference/test frequency converter
Rf inputs mouthful；
Signal is divided into two-way by secondary signal source by power splitter, acts on calibration frequency converter and reference/test frequency converter
Local oscillator drive port；
The output for calibrating frequency converter accesses the first receiver, and the second receiver is accessed with reference to the output of/test frequency converter, leads to
Cross local vibration source and the reception signal of the first receiver and the second receiver is down-converted to IF-FRE, then intermediate-freuqncy signal is by number
Word sampling, Vector operation treatment, the complex signal that will be obtained are transmitted to computer module.
Alternatively, in test process, first, calibration frequency converter is connected into test device, record calibration with reference to frequency converter
Frequency converter and the error with reference to frequency converter path and calibration frequency converter and the phase deviation with reference to frequency converter, are denoted as
Difference；
Difference=E0+Ebase-Ecal
Wherein, E0 is the two paths error for accessing frequency converter, the phase deviation of frequency converter on the basis of Ebase, and Ecal is
Calibrate the phase deviation of frequency converter.
Then, test frequency converter will be replaced with reference to frequency converter, by calibration frequency converter and with reference to frequency converter path and calibration
The phase deviation of frequency converter is eliminated, and obtains deviation of the test frequency converter relative to benchmark frequency converter.
Alternatively, it is described to replace with test frequency converter with reference to frequency converter, by calibration frequency converter and with reference to frequency converter path
With calibration frequency converter phase deviation eliminate, obtain test frequency converter relative to benchmark frequency converter deviation the step of, specially：
Setting test curve is (Receiver2-Receiver1)-Difference；
(Receiver2-Receiver1)-Difference
=(E0+Emeas-Ecal)-(E0+Ebase-Ecal)
=Emeas-Ebase
Wherein, E0 is the two paths error for accessing frequency converter, the phase deviation of frequency converter on the basis of Ebase, and Ecal is
The phase deviation of frequency converter is calibrated, Emeas is the phase deviation of Measurement for Inverter.
It is the invention allows for a kind of frequency converter phase equalization method of testing including following based on above-mentioned test device
Step：
The first step：Frequency, the power of the first signal source are set；
Second step：Frequency, the power in secondary signal source are set；
3rd step：The receives frequency of the first receiver and the second receiver is set；
4th step：Record calibrates the error and calibration frequency converter of frequency converter and reference frequency converter path and refers to frequency converter
Phase deviation, be denoted as Difference；
Difference=E0+Ebase-Ecal
Wherein, E0 is the two paths error for accessing frequency converter, the phase deviation of frequency converter on the basis of Ebase, and Ecal is
Calibrate the phase deviation of frequency converter；
5th step：Tested test frequency converter will be replaced with reference to frequency converter；
6th step：Setting test curve is (Receiver2-Receiver1)-Difference；
(Receiver2-Receiver1)-Difference
=(E0+Emeas-Ecal)-(E0+Ebase-Ecal)
=Emeas-Ebase
Wherein, E0 is the two paths error for accessing frequency converter, the phase deviation of frequency converter on the basis of Ebase, and Ecal is
The phase deviation of frequency converter is calibrated, Emeas is the phase deviation of Measurement for Inverter.
The beneficial effects of the invention are as follows：
(1) it is not only restricted to frequency converter internal structure；
(2) relative to vector calibration, scalar+phase alignment test, calibration process of the invention is simple；
(3) relative to scalar+phase alignment test, hardware cost of the invention is lower.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is frequency converter phase conformance testing device of the present invention and measured piece annexation schematic diagram；
Fig. 2 is digital signal vector process chart of the invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Traditional frequency converter phase test method is that frequency converter conversion loss is entered using 2 signal sources and 1 frequency spectrograph
Row measurement, the method can not realize the measurement to phase, group delay.
For this situation, the present invention provides a kind of frequency converter phase conformance testing device and method, by what is produced
Test by frequency converter be used as calibration and frequency converter and refer to frequency converter, phase equalization survey is carried out to test frequency converter to be measured
Examination, therefore, calibrate frequency converter, belong to identical product model with reference to frequency converter and test frequency converter, make with identical frequency
It is identical with scope, i.e. frequency property, frequency conversion series.Calibration frequency converter and with reference to frequency converter be index meet hand over inspection require,
Know the frequency converter of index.The effect for calibrating frequency converter is used as calibration, eliminates two path errors；It is as a comparison with reference to frequency converter
Benchmark is used；Test frequency converter is to need test, one group of frequency converter of unknown index.The present invention produces survey by two built-in sources
Trial signal, outputs a signal to calibrate frequency converter and reference/test frequency converter port by power splitter, is then received by two-way
Signal process and obtains phase equalization test result by passage.
As shown in figure 1, frequency converter phase conformance testing device internal motivation of the invention refers to base using same frequency
Standard, device internal motivation has 1 local vibration source L0, and 2 independent signal sources, i.e. signal source 1 and signal source 2 can simultaneously produce difference
The signal of frequency.
Signal is divided into two-way by power splitter by signal source 1, acts on calibration frequency converter and reference/test frequency converter
Rf inputs mouthful R.
Signal is divided into two-way by power splitter by signal source 2, acts on calibration frequency converter and reference/test frequency converter
Local oscillator drives port L.
The output for calibrating frequency converter and reference/test frequency converter is respectively connected to receiver 1 and receiver 2, by device
The local vibration source L0 in portion, IF-FRE is down-converted to by the reception signal of receiver 1 and receiver 2, and then signal is adopted by numeral
The treatment such as sample, Vector operation, the complex signal that will be obtained is transmitted to computer module, and computer module will obtain complex signal to be carried out
Further arithmetical operation, carries out the display of result, obtains phase equalization test result.
In test process, first, calibration frequency converter is connected into test device with reference to frequency converter, record calibration frequency converter with
With reference to the error and calibration frequency converter and the phase deviation Difference with reference to frequency converter of frequency converter path；
Difference=E0+Ebase-Ecal
Wherein, E0 is the two paths error for accessing frequency converter, i.e., lead to calibration frequency converter with reference to frequency converter path errors
The difference of road error, with reference to frequency converter path errors not comprising the phase deviation with reference to frequency converter, calibrates frequency converter path errors
Phase deviation not comprising calibration frequency converter, Ebase is the phase deviation with reference to frequency converter, and Ecal is the phase for calibrating frequency converter
Deviation.
Then, test frequency converter will be replaced with reference to frequency converter, by calibration frequency converter and with reference to frequency converter path and calibration
The phase difference of frequency converter is eliminated, and obtains deviation of the test frequency converter relative to benchmark frequency converter, specially：Setting test curve is
(Receiver2-Receiver1)-Difference；
(Receiver2-Receiver1)-Difference
=(E0+Emeas-Ecal)-(E0+Ebase-Ecal)
=Emeas-Ebase
Wherein, E0 is that the two paths error for accessing frequency converter, i.e. test frequency converter's path errors lead to calibration frequency converter
The difference of road error, phase deviation of test frequency converter's path errors not comprising test frequency converter, therefore, test frequency converter's path
Error is identical with reference to frequency converter path errors, phase deviation of the calibration frequency converter path errors not comprising calibration frequency converter,
The phase deviation of frequency converter on the basis of Ebase, Ecal is the phase deviation for calibrating frequency converter, and Emeas is the phase of Measurement for Inverter
Position deviation.
The error for eliminating path is calculated by this, the result for obtaining is relative to the deviation of benchmark frequency converter.
Based on above-mentioned test device, the invention allows for a kind of frequency converter phase equalization method of testing, by calibration
To fall by the error correction of two frequency converter paths, calibration process is as follows：
The first step：Setting is input to two frequencies of frequency converter prevention at radio-frequency port, power, the i.e. frequency of signal source 1, power.
Second step：Setting is input to two frequency, the power of frequency converter local oscillator port, the i.e. frequency of signal source 2, power.
3rd step：The receives frequency of receiver 1 and receiver 2 is set.
4th step：The result for recording the signal Receiver2 signal Receiver1 that subtract receiver 1 of receiver 2 is
Difference is stored；
Difference=E0+Ebase-Ecal
Wherein, E0 is the two paths error for accessing frequency converter, the phase deviation of frequency converter on the basis of Ebase, and Ecal is
Calibrate the phase deviation of frequency converter.
5th step：Tested test frequency converter will be replaced with reference to frequency converter.
6th step：Setting test curve is (Receiver2-Receiver1)-Difference；
(Receiver2-Receiver1)-Difference
=(E0+Emeas-Ecal)-(E0+Ebase-Ecal)
=Emeas-Ebase
Wherein, E0 is the two paths error for accessing frequency converter, the phase deviation of frequency converter on the basis of Ebase, and Ecal is
The phase deviation of frequency converter is calibrated, Emeas is the phase deviation of Measurement for Inverter.
The error for eliminating path is calculated by this, the result for obtaining is relative to the deviation of benchmark frequency converter.
(Receiver2-Receiver1) in above-mentioned 6th step formula is by the parameter of test frequency converter and calibration frequency converter
It is compared；Again by subtracting the normalized of Difference, the error of reference/measurement path and calibration path is carried out
Amendment；Most measurement result has been matched with reference on frequency converter at last.
Test process repeat replacement test frequency converter, display curve still for (Receiver2-Receiver1)-
Difference, you can obtain current Measurement for Inverter relative to the phase equalization result with reference to frequency converter.
Using same frequency reference in frequency converter phase conformance testing device of the invention, signal source 1, signal source 2 can
To export different frequency signals simultaneously；The signal demand that receiver 1, receiver 2 are received carries out IQ demodulation and obtains vector signal,
Digital signal vector handling process is as shown in Figure 2；Measure frequency converter test preceding, it is necessary to enter using reference and calibration frequency converter
Row data normalization, eliminates path errors；Because receiving terminal is vector calculus, it is also possible to while the uniformity for entering line amplitude is surveyed
Examination.
Relative to vector calibration test, frequency converter phase conformance testing device of the invention is not only restricted to inside frequency converter
Structure；Relative to vector calibration, scalar+phase alignment test, calibration process of the invention is simple；Relative to scalar+phase school
Quasi- test, hardware cost of the invention is low.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (4)
1. a kind of frequency converter phase conformance testing device, it is characterised in that will test by frequency converter as calibration frequency conversion
Device and frequency converter is referred to, phase equalization test is carried out to test frequency converter to be measured；Internal motivation is referred to using same frequency
Benchmark, internal motivation has 1 local vibration source and 2 independent signal sources, i.e. the first signal source and secondary signal source；
Signal is divided into two-way by the first signal source by power splitter, acts on calibration frequency converter and reference/test frequency converter penetrates
Frequency input terminal mouthful；
Signal is divided into two-way by secondary signal source by power splitter, acts on the sheet of calibration frequency converter and reference/test frequency converter
Shake driving port；
The output for calibrating frequency converter accesses the first receiver, the second receiver is accessed with reference to the output of/test frequency converter, by this
The reception signal of the first receiver and the second receiver is down-converted to IF-FRE by vibration source, and then intermediate-freuqncy signal is adopted by numeral
Sample, Vector operation treatment, the complex signal that will be obtained are transmitted to computer module.
2. a kind of frequency converter phase conformance testing device as claimed in claim 1, it is characterised in that
In test process, first, calibration frequency converter is connected into test device, record calibration frequency converter and reference with reference to frequency converter
Error and calibration frequency converter and the phase deviation with reference to frequency converter of frequency converter path, are denoted as Difference；
Difference=E0+Ebase-Ecal
Wherein, E0 is the two paths error for accessing frequency converter, and the phase deviation of frequency converter on the basis of Ebase, Ecal is calibration
The phase deviation of frequency converter.
Then, test frequency converter will be replaced with reference to frequency converter, by calibration frequency converter and reference frequency converter path and calibration frequency conversion
The phase deviation of device is eliminated, and obtains deviation of the test frequency converter relative to benchmark frequency converter.
3. a kind of frequency converter phase conformance testing device as claimed in claim 2, it is characterised in that it is described will be with reference to frequency conversion
Device replaces with test frequency converter, will calibrate frequency converter and is eliminated with the phase deviation with reference to frequency converter path and calibration frequency converter, obtains
To test frequency converter relative to benchmark frequency converter deviation the step of, specially：
Setting test curve is (Receiver2-Receiver1)-Difference；
(Receiver2-Receiver1)-Difference
=(E0+Emeas-Ecal)-(E0+Ebase-Ecal)
=Emeas-Ebase
Wherein, E0 is the two paths error for accessing frequency converter, and the phase deviation of frequency converter on the basis of Ebase, Ecal is calibration
The phase deviation of frequency converter, Emeas is the phase deviation of Measurement for Inverter.
4. the frequency converter phase equalization method of testing of test device described in any one of claims 1 to 3 is based on, and its feature exists
In comprising the following steps：
The first step：Frequency, the power of the first signal source are set；
Second step：Frequency, the power in secondary signal source are set；
3rd step：The receives frequency of the first receiver and the second receiver is set；
4th step：Record calibration frequency converter and the error with reference to frequency converter path and calibration frequency converter and the phase with reference to frequency converter
Position deviation, is denoted as Difference；
Difference=E0+Ebase-Ecal
Wherein, E0 is the two paths error for accessing frequency converter, and the phase deviation of frequency converter on the basis of Ebase, Ecal is calibration
The phase deviation of frequency converter；
5th step：Tested test frequency converter will be replaced with reference to frequency converter；
6th step：Setting test curve is (Receiver2-Receiver1)-Difference；
(Receiver2-Receiver1)-Difference
=(E0+Emeas-Ecal)-(E0+Ebase-Ecal)
=Emeas-Ebase
Wherein, E0 is the two paths error for accessing frequency converter, and the phase deviation of frequency converter on the basis of Ebase, Ecal is calibration
The phase deviation of frequency converter, Emeas is the phase deviation of Measurement for Inverter.
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| CN109739172A (en) * | 2019-01-03 | 2019-05-10 | 苏州巨联电气有限公司 | A kind of frequency converter checking platform |
| CN110988548A (en) * | 2019-12-16 | 2020-04-10 | 航天恒星科技有限公司 | Test method and platform of microwave frequency converter |
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| CN106771712B (en) | 2019-07-26 |
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