CN108614207A - A kind of the signal source switching device and method of vector network analyzer - Google Patents
A kind of the signal source switching device and method of vector network analyzer Download PDFInfo
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- CN108614207A CN108614207A CN201810500082.4A CN201810500082A CN108614207A CN 108614207 A CN108614207 A CN 108614207A CN 201810500082 A CN201810500082 A CN 201810500082A CN 108614207 A CN108614207 A CN 108614207A
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- signal source
- frequency
- signal
- local oscillation
- switching device
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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
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
Abstract
The present invention provides the signal source switching devices and method of a kind of vector network analyzer, first radiofrequency signal is mixed with first local oscillation signal by frequency cells, the type of signal source is judged by signal judging unit, and corresponding signal source is executed according to the type of the signal source and executes program, radio-frequency signal source is set to be unified into a Frequency Synthesizes Source with local oscillation signal source, reduce a large amount of workload for the production and debugging stage in later stage, greatly improve production efficiency, when solving the attribute that existing circuit board program Solidification changes circuit board later need that corresponding program is written again, and in the maintenance to document information, it is also required to change the data of local oscillation signal source and radio-frequency signal source simultaneously, the problem of increasing the complexity of circuit debugging and expending great effort.
Description
Technical field
The invention belongs to Network Analyzer technical field more particularly to a kind of signal source of vector network analyzer switching dresses
It sets and method.
Background technology
Vector network analyzer is a kind of Artificial Intelligence Instrument developed in sweep frequency technique, is mainly used for circuit test,
Intermittent point-frequency measurement is changed to continuous sweep measurement, can effectively promote the efficiency of test, general vector network point
Analyzer can all carry radio-frequency signal source and local oscillation signal source, and radiofrequency signal after measured piece with local oscillation signal by being mixed, and to mixed
Intermediate-freuqncy signal after frequency is handled, and the parameters in measured piece are obtained.Phase is usually separately designed in vector network analyzer
The program of the radio-frequency signal source and local oscillation signal source answered separately designs radiofrequency signal according to the data of host computer and is derived from local oscillation signal
The output power in source, then in process of production, the type of the signal source used according to circuit board cure corresponding program.
When however, changing the attribute of circuit board after circuit board program Solidification need that corresponding program is written again, and
In the maintenance to document information, it is also desirable to while the data of local oscillation signal source and radio-frequency signal source is changed, increase circuit tune
The complexity of examination simultaneously expends great effort.
Invention content
The purpose of the present invention is to provide a kind of signal source switching devices of vector network analyzer, to solve circuit board journey
It when the attribute of change circuit board needs that corresponding program is written again after sequence solidification, and in the maintenance to document information,
It is also required to change the data of local oscillation signal source and radio-frequency signal source simultaneously, increases the complexity of circuit debugging and expends a large amount of
The problem of energy.
The embodiment of the present invention proposes a kind of signal source switching device of vector network analyzer, the signal source switching dress
Set including：
Radiofrequency signal source unit, for exporting the first radiofrequency signal；
Local oscillation signal source unit, for exporting the first local oscillation signal；
Signal source selecting unit, for needing to select the type of signal source according to user；
Control unit executes program for executing corresponding signal source according to the type of the signal source.
Optionally, the signal source switching device further includes：Signal source judging unit, for judging the signal source
Type.
Optionally, the difference between the frequency of first radiofrequency signal and the frequency of first local oscillation signal is
7.6MHz。
Optionally, the signal source switching device further includes：Feedback unit, the feedback letter for being exported according to back-end circuit
Number output predeterminated frequency and power.
The embodiment of the present invention also proposed a kind of signal source switch method of vector network analyzer, the signal source switching
Method includes：
It needs to select the type of signal source according to user；
Judge the type of signal source output；
Corresponding signal source, which is executed, according to the type of the signal source executes program.
Optionally, the type of the signal source output includes radio-frequency signal source and local oscillation signal source.
Optionally, the difference between the frequency of first radiofrequency signal and the frequency of first local oscillation signal is
7.6MHz。
Optionally, the signal source switch method further includes：
According to the feedback signal output predeterminated frequency and power of back-end circuit output.
The present invention provides the signal source switching device and method of a kind of vector network analyzer, by frequency cells by institute
It states the first radiofrequency signal to be mixed with first local oscillation signal, the type of signal source is sentenced by signal judging unit
It is disconnected, and corresponding signal source is executed according to the type of the signal source and executes program, so that radio-frequency signal source is united with local oscillation signal source
11% Frequency Synthesizes Source reduces a large amount of workload for the production and debugging stage in later stage, greatly improves production
Efficiency when solving the attribute that existing circuit board program Solidification changes circuit board later needs that corresponding program is written again,
And in the maintenance to document information, it is also desirable to while the data of local oscillation signal source and radio-frequency signal source is changed, increase electricity
The complexity of road debugging and the problem of expend great effort.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description be only the present invention some
Embodiment for those of ordinary skill in the art without having to pay creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of structural representation of the signal source switching device for vector network analyzer that the embodiment of the present invention 1 provides
Figure；
Fig. 2 is a kind of structural representation of the signal source switching device for vector network analyzer that the embodiment of the present invention 2 provides
Figure；
Fig. 3 is the pictorial diagram of the signal source switching device of the vector network analyzer in the embodiment of the present invention.
Fig. 4 is the structure chart of the vector network analyzer of the model AV365B in the embodiment of the present invention.
Fig. 5 is a kind of flow signal of the signal source switch method for vector network analyzer that the embodiment of the present invention 3 provides
Figure；
Fig. 6 is a kind of flow signal of the signal source switch method for vector network analyzer that the embodiment of the present invention 4 provides
Figure.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In order to illustrate technical solutions according to the invention, illustrated below by specific embodiment.
Fig. 1 is a kind of structural representation of the signal source switching device for vector network analyzer that the embodiment of the present invention 1 provides
Figure, as shown in Figure 1, signal source switching device includes：Radiofrequency signal source unit 101, for exporting the first radiofrequency signal；Local oscillator is believed
Number source unit 102, for exporting the first local oscillation signal；Signal source selecting unit 103, for being needed to signal source according to user
Type is selected；Control unit 104 executes program for executing corresponding signal source according to the type of signal source.
In common vector network analyzer, inside can all carry radio-frequency signal source and local oscillation signal source, radiofrequency signal
Source is handled the intermediate frequency after mixing by being mixed with local oscillation signal source after measured piece, obtains corresponding measured piece
Parameters, for the phaselocked loop of fixed intermediate frequency, radio-frequency signal source and local oscillation signal source essence are all signal sources, only defeated
An intermediate frequency can be differed in the frequency gone out, it can be according to the demand different from of back-end circuit, therefore, in design production on power
In the process, then it needs to design 2 signal sources.
In the present embodiment, by the setting signal source selecting unit in vector network analyzer, for according to user's need
The type of signal source is selected, Fig. 3 is the signal source switching device of the vector network analyzer in the embodiment of the present invention
Pictorial diagram, as shown in figure 3, in the present embodiment, signal source selecting unit 103 is that a signal source to input carries out two choosings
One alternative module can carry out loading different journeys in actual mechanical process according to according to the state of alternative module
Sequence, to realize the unification of radio-frequency signal source and local oscillation signal source.Specifically, being provided with two interfaces of A8 and A9, pass through short circuit
Cap connection A8 or A9 selects signal Source Type, if short circuit cap is connect with A9, it is corresponding to execute radio-frequency signal source
Program executes the corresponding program in local oscillation signal source if short circuit cap and A8 connections or when being all not connected to.In radio-frequency signal source
After forming Frequency Synthesizes Source with local oscillation signal source, in the maintenance of document information, it is only necessary to the related letter of frequency of maintenance synthetic source
Breath needs to be safeguarded to come to the document information of radio-frequency signal source and local oscillation signal source respectively compared with the prior art in scheme
It says, reduces the workload of half.
Further, in the present embodiment, in carrying out debugging process to the signal of Network Analyzer, it is only necessary to according to frequency
The signal of rate synthetic source is debugged, and need not be debugged to local oscillation signal source and radio-frequency signal source, be sentenced by signal respectively
Alternative module in disconnected unit can be distinguished corresponding work by external circuit naked eyes, greatly reduce debugging and life
The workload of production, improves work efficiency.
As an embodiment of the present invention, signal source switching device further includes：Signal source judging unit 105, for judging
The type of signal source.
In the present embodiment, the port of signal source access is judged by signal source judging unit, and is determined according to the port
The program of vector network analyzer load.
As an embodiment of the present invention, the difference between the frequency of the first radiofrequency signal and the frequency of the first local oscillation signal is
7.6MHz。
In the present embodiment, the model AV365B of vector network analyzer, structure is as shown in figure 4, can from Fig. 4
Go out, 8.5GHz radio frequency sources reference frequency output is in 300K-8.5GHz, and 8.5GHz local vibration source reference frequency outputs are in 15.6MHz-
8.5076GHz, 2 phase difference frequencies are in 7.6MHz.7.6MHz i.e. IF frequency.When vector network analyzer is working
When, computer gives the radio frequency source of 8.5GHz and the local vibration source of 8.5GHz to send corresponding control signal respectively, it is assumed that radio frequency source
Frequency is FRF, the frequency of local vibration source is FLO, then FRFAnd FLOIt needs to meet formula：FLO=FIF+FRF, wherein FIFFor intermediate frequency, tool
Body, in the present embodiment, FIFFor 7.6MHz.
In the present embodiment, radio frequency source is with local vibration source by being mixed after source module, and to the intermediate frequency after mixing at
Reason, obtains the parameters of corresponding measured piece, and show by display module.
As an embodiment of the present invention, referring to Fig. 2, signal source switching device further includes：Feedback unit 106 is used for basis
The feedback signal output predeterminated frequency and power of back-end circuit output.
In the present embodiment, radio-frequency signal source and local oscillation signal source are connect by connector with PCB motherboards, and DSP passes through mother
After plate transmission data, radio-frequency signal source and local oscillation signal source receive data, corresponding control letter is converted it by FPGA
Number, back-end circuit feeds back to signal source switching device after receiving the control signal, to generate the frequency and power of needs.
Specifically, in the present embodiment, also increase the connector of an X3 by the peripheral circuit of FPGA, while executing
It is modified accordingly in program.
Fig. 5 is a kind of flow signal of the signal source switch method of vector network analyzer provided in an embodiment of the present invention
Figure, as shown in figure 5, signal source switch method includes：
S501：It needs to select the type of signal source according to user；
S502：Judge the type of signal source output；
S503：Corresponding signal source, which is executed, according to the type of signal source executes program.
In the present embodiment, selection function is increased within hardware, increases the program of a judgement on software, to make arrow
The circuit board of two pieces of realization different function is united in amount Network Analyzer,
As an embodiment of the present invention, the type of signal source output includes radio-frequency signal source and local oscillation signal source.
As an embodiment of the present invention, the difference between the frequency of the first radiofrequency signal and the frequency of the first local oscillation signal is
7.6MHz。
Fig. 6 is a kind of flow signal of the signal source switch method for vector network analyzer that the embodiment of the present invention 4 provides
Figure, as an embodiment of the present invention, signal source switch method further includes：
S504：According to the feedback signal output predeterminated frequency and power of back-end circuit output.
The present invention provides the signal source switching device and method of a kind of vector network analyzer, by frequency cells by
One radiofrequency signal is mixed with the first local oscillation signal, is judged the type of signal source by signal judging unit, and root
Corresponding signal source is executed according to the type of signal source and executes program, and radio-frequency signal source is made to be unified into a frequency with local oscillation signal source
Synthetic source reduces a large amount of workload for the production and debugging stage in later stage, greatly improves production efficiency, solve existing
It when the attribute for changing circuit board after some circuit board program Solidifications needs that corresponding program is written again, and is provided to document
In the maintenance of material, it is also desirable to while the data of local oscillation signal source and radio-frequency signal source is changed, increase the complicated journey of circuit debugging
The problem of spending and expending great effort.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
All any modification, equivalent and improvement made by within principle etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of signal source switching device of vector network analyzer, which is characterized in that the signal source switching device includes：
Radiofrequency signal source unit, for exporting the first radiofrequency signal；
Local oscillation signal source unit, for exporting the first local oscillation signal；
Signal source selecting unit, for needing to select the type of signal source according to user；
Control unit executes program for executing corresponding signal source according to the type of the signal source.
2. signal source switching device as described in claim 1, which is characterized in that the signal source switching device further includes：
Signal source judging unit, for the type to judging the signal source.
3. signal source switching device as described in claim 1, which is characterized in that the frequency of first radiofrequency signal with it is described
Difference between the frequency of first local oscillation signal is 7.6MHz.
4. signal source switching device as described in claim 1, which is characterized in that the signal source switching device further includes：
Feedback unit, the feedback signal for being exported according to back-end circuit export corresponding frequency and power.
5. a kind of signal source switch method of vector network analyzer, which is characterized in that the signal source switch method includes：
It needs to select the type of signal source according to user；
Judge the type of signal source output；
Corresponding signal source, which is executed, according to the type of the signal source executes program.
6. signal source switch method as claimed in claim 4, which is characterized in that the type of the signal source output includes radio frequency
Signal source and local oscillation signal source.
7. signal source switch method as claimed in claim 5, which is characterized in that the frequency of first radiofrequency signal with it is described
Difference between the frequency of first local oscillation signal is 7.6MHz.
8. signal source switch method as claimed in claim 5, which is characterized in that the signal source switch method further includes：
Corresponding frequency and power are exported according to the feedback signal of back-end circuit output.
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| CN201810500082.4A CN108614207A (en) | 2018-05-23 | 2018-05-23 | A kind of the signal source switching device and method of vector network analyzer |
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Cited By (1)
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Application publication date: 20181002 |