CN106771712B - 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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- CN106771712B CN106771712B CN201611036833.9A CN201611036833A CN106771712B CN 106771712 B CN106771712 B CN 106771712B CN 201611036833 A CN201611036833 A CN 201611036833A CN 106771712 B CN106771712 B CN 106771712B
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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
Abstract
The invention proposes a kind of frequency converter phase conformance testing device, the frequency converter that test is passed through carries out phase equalization test to test frequency converter to be measured as calibration frequency converter and with reference to frequency converter；Internal motivation uses same frequency reference data, and signal is divided into two-way by power splitter by the first signal source, acts on calibration frequency converter and reference/test frequency converter rf inputs mouth；Signal is divided into two-way by power splitter by second signal source, acts on calibration frequency converter and reference/test frequency converter local oscillator 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, the reception signal of the first receiver and the second receiver is down-converted to IF frequency by local vibration source, then intermediate-freuqncy signal passes through digital sample, vector calculation processing, and obtained complex signal is transmitted to computer module.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 the field of test technology, in particular to a kind of frequency converter phase conformance testing device further relates to one
Kind frequency converter phase equalization test method.
Background technique
Microwave converter is applied to electronics and the microwave and millimeter wave test equipments such as radar, communication, electronic reconnaissance, realizes
Frequency transform function, is the important component of microwave and millimeter wave system, and the quality of characteristic directly affects the performance of the equipment or instrument.
When the signal of radar, communication, test equipment receives processing, need to carry out big bandwidth processing, it is flat for the phase of frequency converter
Degree, group delay all require.But the input due to frequency converter, local oscillator and intermediate frequency port work are over different frequencies, it can not
It is measured as other microwave components using vector network analyzer.
The phase test of existing frequency converter carries out vector calibration or scalar+phase usually using vector network analyzer
Calibration is tested.Both modes require to carry out frequency transformation setting to the lattice gauge of test, to guarantee received signal
It can compare, and then increase the complexity of connection setting.And both mode calibration steps are various, and vector calibration is at least
11 steps, scalar+phase at least 9 steps, calibration process is complicated, be easy to cause operation error.
In face of producing in enormous quantities and manufacturing, the connection and calibration of the phase test complexity of existing frequency converter can all influence to imitate
Rate.
Summary of the invention
To solve above-mentioned deficiency of the prior art, the present invention propose a kind of frequency converter phase conformance testing device and side
Method.
The technical scheme of the present invention is realized as follows:
A kind of frequency converter phase conformance testing device, the frequency converter that test is passed through is as calibration frequency converter and with reference to change
Frequency device carries out phase equalization test 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 second signal source are encouraged；
Signal is divided into two-way by power splitter by the first signal source, acts on calibration frequency converter and reference/test frequency converter
Rf inputs mouth；
Signal is divided into two-way by power splitter by second signal source, acts on calibration frequency converter and reference/test frequency converter
Local oscillator drive port；
The output for calibrating frequency converter accesses the first receiver, accesses the second receiver with reference to the output of/test frequency converter, leads to
It crosses local vibration source and the reception signal of the first receiver and the second receiver is down-converted to IF frequency, then intermediate-freuqncy signal passes through number
Word sampling, vector calculation processing, are transmitted to computer module for obtained complex signal.
Optionally, in test process, firstly, being connected into test device, record calibration by calibration frequency converter and with reference to frequency converter
The phase deviation of frequency converter and error and calibration frequency converter and reference frequency converter with reference to frequency converter access, is denoted as
Difference；
Difference=E0+Ebase-Ecal
Wherein, E0 is the two paths error for accessing frequency converter, and Ebase is the phase deviation of benchmark frequency converter, and Ecal is
Calibrate the phase deviation of frequency converter.
Then, test frequency converter will be replaced with reference to frequency converter, and by calibration frequency converter and will refer to frequency converter access and calibration
The phase deviation of frequency converter is eliminated, and deviation of the test frequency converter relative to benchmark frequency converter is obtained.
Optionally, described to replace with test frequency converter with reference to frequency converter, by calibration frequency converter and refer to frequency converter access
The step of eliminating with the phase deviation of calibration frequency converter, obtain deviation of the test frequency converter relative to benchmark frequency converter, specifically:
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 Ebase is the phase deviation of benchmark frequency converter, and Ecal is
The phase deviation of frequency converter is calibrated, Emeas is the phase deviation of Measurement for Inverter.
Based on above-mentioned test device, the invention also provides a kind of frequency converter phase equalization test method, including it is following
Step:
Step 1: the frequency of the first signal source of setting, power；
Step 2: the frequency in setting second signal source, power；
Step 3: the reception frequency of setting the first receiver and the second receiver；
Step 4: recording the error of calibration frequency converter and reference frequency converter access and calibrating frequency converter and refer to frequency converter
Phase deviation, be denoted as Difference；
Difference=E0+Ebase-Ecal
Wherein, E0 is the two paths error for accessing frequency converter, and Ebase is the phase deviation of benchmark frequency converter, and Ecal is
Calibrate the phase deviation of frequency converter；
Step 5: reference frequency converter to be replaced with to tested test frequency converter；
Step 6: 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 Ebase is the phase deviation of benchmark frequency converter, 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 present invention are:
(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.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is frequency converter phase conformance testing device of the present invention and measured piece connection relationship diagram；
Fig. 2 is digital signal vector process flow diagram of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Traditional frequency converter phase test method be using 2 signal sources and 1 frequency spectrograph to frequency converter conversion loss into
Row measurement, the method can not achieve 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
The frequency converter passed through is tested as calibration frequency converter and with reference to frequency converter, phase equalization survey is carried out to test frequency converter to be measured
Examination, therefore, calibration frequency converter belong to identical product model with reference to frequency converter and test frequency converter, and frequency having the same makes
With range, i.e. frequency property, frequency conversion series is identical.Calibrating frequency converter and referring to frequency converter is that index meets friendship inspection requirement,
Know the frequency converter of index.The effect of calibration frequency converter is used as calibrating, and eliminates two path errors；It is as a comparison with reference to frequency converter
Benchmark uses；Test frequency converter is one group of frequency converter for needing test, unknown index.The present invention generates survey by two built-in sources
Trial signal outputs a signal to calibration frequency converter and reference/test frequency converter port by power splitter, is then received by two-way
Channel is handled signal to obtain phase equalization test result.
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 have 1 local vibration source L0, and 2 independent signal sources, i.e. signal source 1 and signal source 2 can generate difference simultaneously
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 mouth 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.
Calibration frequency converter and reference/test frequency converter output are respectively connected to receiver 1 and receiver 2, by device
The reception signal of receiver 1 and receiver 2 is down-converted to IF frequency by the local vibration source L0 in portion, and then signal is adopted by number
Obtained complex signal is transmitted to computer module by sample, vector calculating etc. reason, and computer module will obtain complex signal progress
Further arithmetical operation carries out the display of result, obtains phase equalization test result.
In test process, firstly, calibration frequency converter and test device will be connected into reference to frequency converter, record calibration frequency converter with
With reference to the error and calibration frequency converter of frequency converter access and with reference to the phase deviation Difference of frequency converter；
Difference=E0+Ebase-Ecal
Wherein, E0 is the two paths error for accessing frequency converter, i.e., logical with reference to frequency converter path errors and calibration frequency converter
The difference of road error does not include the phase deviation with reference to frequency converter with reference to frequency converter path errors, calibrates frequency converter path errors
Phase deviation not comprising calibration frequency converter, Ebase are 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, and by calibration frequency converter and will refer to frequency converter access and calibration
The phase difference of frequency converter is eliminated, and deviation of the test frequency converter relative to benchmark frequency converter is obtained, specifically: test curve, which is arranged, 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, i.e. test frequency converter's path errors and calibration frequency converter are logical
The difference of road error, test frequency converter's path errors do not include the phase deviation of test frequency converter, therefore, test frequency converter's access
Error is identical as with reference to frequency converter path errors, and calibration frequency converter path errors do not include the phase deviation of calibration frequency converter,
Ebase is the phase deviation of benchmark frequency converter, and Ecal is the phase deviation for calibrating frequency converter, and Emeas is the phase of Measurement for Inverter
Position deviation.
The error of access is eliminated by this calculating, it is obtaining the result is that deviation relative to benchmark frequency converter.
Based on above-mentioned test device, the invention also provides a kind of frequency converter phase equalization test methods, by calibration
It will fall by the error correction of two frequency converter accesses, calibration process is as follows:
Step 1: setting is input to frequency, the power of two frequency converter prevention at radio-frequency port, the i.e. frequency of signal source 1, power.
Step 2: setting is input to frequency, the power of two frequency converter local oscillator ports, the i.e. frequency of signal source 2, power.
Step 3: the reception frequency of setting receiver 1 and receiver 2.
Step 4: the result for the signal Receiver1 that the signal Receiver2 of record receiver 2 subtracts receiver 1 is
Difference is stored；
Difference=E0+Ebase-Ecal
Wherein, E0 is the two paths error for accessing frequency converter, and Ebase is the phase deviation of benchmark frequency converter, and Ecal is
Calibrate the phase deviation of frequency converter.
Step 5: reference frequency converter to be replaced with to tested test frequency converter.
Step 6: 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 Ebase is the phase deviation of benchmark frequency converter, and Ecal is
The phase deviation of frequency converter is calibrated, Emeas is the phase deviation of Measurement for Inverter.
The error of access is eliminated by this calculating, it is obtaining the result is that deviation relative to benchmark frequency converter.
(Receiver2-Receiver1) in above-mentioned 6th step formula by the parameter of test frequency converter and calibrates frequency converter
It is compared；Again by subtracting the normalized of Difference, the error of reference/measurement access and calibration access is carried out
Amendment；Finally measurement result has been matched to reference on frequency converter.
Test process repeats replacement test frequency converter, and display curve is still (Receiver2-Receiver1)-
Phase equalization result of the current Measurement for Inverter relative to reference frequency converter can be obtained in Difference.
It is referred in frequency converter phase conformance testing device of the invention using same frequency, signal source 1, signal source 2 can
To export different frequency signals simultaneously；The signal that receiver 1, receiver 2 receive needs to carry out IQ and demodulates to obtain vector signal,
Digital signal vector process flow is as shown in Figure 2；Measure frequency converter test before, need using refer to and calibration frequency converter into
Row data normalization eliminates path errors；Because receiving end is vector calculus, the consistency that can also carry out amplitude simultaneously is surveyed
Examination.
It is tested relative to vector calibration, 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 are low.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (3)
1. a kind of frequency converter phase conformance testing device, which is characterized in that the frequency converter for passing through test is as calibration frequency conversion
Device and refer to frequency converter, to test frequency converter to be measured carry out phase equalization test；Internal motivation is referred to using same frequency
Benchmark, internal motivation have 1 local vibration source and 2 independent signal sources, i.e. the first signal source and second signal source；
Signal is divided into two-way by power splitter by the first signal source, acts on calibration frequency converter and reference/test frequency converter penetrates
Frequency input terminal mouth；
Signal is divided into two-way by power splitter by second signal source, acts on calibration frequency converter and reference/test frequency converter sheet
Vibration driving port；
The output for calibrating frequency converter accesses the first receiver, accesses the second receiver with reference to the output of/test frequency converter, passes through this
The reception signal of first receiver and the second receiver is down-converted to IF frequency by vibration source, and then intermediate-freuqncy signal is adopted by number
Obtained complex signal is transmitted to computer module by sample, vector calculation processing；
In test process, firstly, being connected into test device, record calibration frequency converter and reference by calibration frequency converter and with reference to frequency converter
The error and calibration frequency converter of frequency converter access 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, and Ebase is the phase deviation with reference to frequency converter, and 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 with reference to frequency converter access and calibration frequency conversion
The phase deviation of device is eliminated, and deviation of the test frequency converter relative to reference frequency converter is obtained.
2. a kind of frequency converter phase conformance testing device as described in claim 1, which is characterized in that described to refer to frequency conversion
Device replaces with test frequency converter, will calibrate frequency converter and eliminates with reference to the phase deviation of frequency converter access and calibration frequency converter, obtains
The step of deviation to test frequency converter relative to reference frequency converter, specifically:
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 Ebase is the phase deviation with reference to frequency converter, and Ecal is calibration
The phase deviation of frequency converter, Emeas are the phase deviation of Measurement for Inverter.
3. based on the frequency converter phase equalization test method of any one of claim 1 to 2 test device, feature exists
In, comprising the following steps:
Step 1: the frequency of the first signal source of setting, power；
Step 2: the frequency in setting second signal source, power；
Step 3: the reception frequency of setting the first receiver and the second receiver；
Step 4: record calibration frequency converter is with the error and calibration frequency converter with reference to frequency converter access and with reference to the phase of frequency converter
Position deviation, is denoted as Difference；
Difference=E0+Ebase-Ecal
Wherein, E0 is the two paths error for accessing frequency converter, and Ebase is the phase deviation with reference to frequency converter, and Ecal is calibration
The phase deviation of frequency converter；
Step 5: reference frequency converter to be replaced with to tested test frequency converter；
Step 6: 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 Ebase is the phase deviation with reference to frequency converter, and Ecal is calibration
The phase deviation of frequency converter, Emeas are the phase deviation of Measurement for Inverter.
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