CN215835403U - Frequency multiplication and mixing pre-amplification module test platform - Google Patents
Frequency multiplication and mixing pre-amplification module test platform Download PDFInfo
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- CN215835403U CN215835403U CN202122360852.XU CN202122360852U CN215835403U CN 215835403 U CN215835403 U CN 215835403U CN 202122360852 U CN202122360852 U CN 202122360852U CN 215835403 U CN215835403 U CN 215835403U
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Abstract
The patent introduces a frequency multiplication and mixing pre-amplification module test platform, which comprises a test control device connected with the input end of a frequency multiplication and mixing pre-amplification module and a measurement unit connected with the output end of the frequency multiplication and mixing pre-amplification module; the test control device comprises a signal generator, a radio frequency switch, a numerical control attenuator and a power supply module, wherein the signal generator, the radio frequency switch, the numerical control attenuator and the power supply module are integrated in the shell; the measuring unit comprises a spectrum analyzer and a noise coefficient analyzer. According to the utility model, through the test control device and the measurement unit, the working loop of the imported frequency doubling and mixing preamplifier module is built, the test of the output frequency, the transmission coefficient, the noise coefficient and the upper limit of linearity can be realized, the working characteristics of the frequency doubling and mixing preamplifier module can be intuitively reflected, the structure is simple, the function is comprehensive, the operation is simple, the test is high-efficiency, and the problem that the imported frequency doubling and mixing preamplifier module cannot be tested is solved.
Description
Technical Field
The utility model relates to the technical field of aviation maintenance, in particular to a frequency multiplication and mixing preamplification module test platform.
Background
The frequency-doubling frequency-mixing preamplification module of the avionic equipment radar microwave receiver is used as a part of important components, a detection method and a detection device of the product are not available in China, and most of the existing radar microwave receivers directly mix frequency by local oscillation signals, so that the requirements of missile-borne multiple local oscillations, high precision and low insertion loss cannot be met; the imported frequency multiplication and mixing pre-amplification module is designed early, a ceramic substrate is used as a substrate, a micro-strip line circuit is used for processing microwave signals, the assembly mode of the ceramic substrate has process defects after the cover is opened, so that the failure rate is high, and the imported frequency multiplication and mixing pre-amplification module cannot be detected and repaired due to the fact that a detection method and a detection device for the frequency multiplication and mixing pre-amplification module are needless in China during maintenance.
In the conventional test, an external reference local vibration source and an emission signal source are required to be built, and the measurement of a plurality of frequency points is completed within the working frequency of a tested frequency doubling and mixing preamplifier module; the method has the disadvantages of complex test, complex test steps, long test time, expensive test instrument and high test cost, and a signal source platform and a test platform need to be set up before each measurement.
Therefore, a frequency-doubling frequency-mixing preamplifier module test platform with high reliability, stable performance and convenient detection needs to be invented.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, provides a frequency multiplication and mixing preamplifier module test platform which is simple to operate and can quickly complete the construction of an imported frequency multiplication and mixing preamplifier module working loop.
The technical scheme adopted by the utility model is as follows:
a frequency multiplication and mixing preamplification module test platform comprises a test control device connected with the input end of a frequency multiplication and mixing preamplification module and a measuring unit connected with the output end of the frequency multiplication and mixing preamplification module;
the test control device comprises a signal generator, a radio frequency switch, a numerical control attenuator and a power supply module, wherein the signal generator, the radio frequency switch, the numerical control attenuator and the power supply module are integrated in the shell;
a plurality of local oscillator signal output ends and a plurality of analog signal output ends of the signal generator are respectively connected with a plurality of local oscillator signal input ends and a plurality of analog signal input ends of the radio frequency switch, the analog signal output end of the radio frequency switch is connected with the input end of the numerical control attenuator, and the local oscillator signal output end of the radio frequency switch is connected with an LO output port of the test control device; the output port of the numerical control attenuator is connected with the RF output port of the test control device;
the measuring unit comprises a spectrum analyzer and a noise coefficient analyzer.
Specifically, the power supply module realizes power supply control of the test platform through the power supply control and the indication switch of the shell panel, the display parallel port of the power supply module is connected with the digital display screen on the shell panel to display no-load voltage, power supply voltage and consumed current, and the power supply module provides power supply to the no-load +12V, +12V and the grounding port of the external interface on the shell panel.
Specifically, the multiple local oscillator signals and the multiple analog signals output by the signal generator are connected to the radio frequency switch, the corresponding local oscillator signals and the corresponding analog signals form a frequency point signal, the radio frequency switch controls the radio frequency switch and the signal generator through a frequency switching knob on a shell panel, the gating output of the multiple frequency point signals is controlled, and the switching of the test frequency points is achieved.
Specifically, the numerical control attenuator adjusts the input analog signal to different attenuation values through a plurality of attenuation uniform adjusting buttons on the panel of the shell.
Due to the adoption of the technical scheme, the utility model has the following advantages:
according to the utility model, through the test control device and the measurement unit, the working loop of the imported frequency doubling and mixing preamplifier module is built, the test of the output frequency, the transmission coefficient, the noise coefficient and the upper limit of linearity can be realized, the working characteristics of the frequency doubling and mixing preamplifier module can be intuitively reflected, the structure is simple, the function is comprehensive, the operation is simple, the test is high-efficiency, and the problem that the imported frequency doubling and mixing preamplifier module cannot be tested is solved.
Drawings
Fig. 1 is a schematic block diagram of the present invention.
Fig. 2 is a schematic view of the internal layout of the test control device housing of the present invention.
Fig. 3 is a schematic layout view of a housing panel of the test control apparatus of the present invention.
Detailed Description
The utility model is further explained below with reference to the drawings and examples, without thereby limiting the scope of protection of the utility model, which is disclosed with the aim of protecting all technical modifications within the scope of the utility model.
With reference to fig. 1-3, a frequency-doubling and mixing pre-amplification module testing platform comprises a testing control device connected with an input end of a frequency-doubling and mixing pre-amplification module and a measuring unit connected with an output end of the frequency-doubling and mixing pre-amplification module.
The test control device comprises a signal generator, a radio frequency switch, a numerical control attenuator and a power supply module, wherein the signal generator, the radio frequency switch, the numerical control attenuator and the power supply module are integrated in the shell; the power supply module realizes the power supply control of the test platform through the power supply control and the indication switch of the shell panel, the display parallel port of the power supply module is connected with the digital display screen on the shell panel to display no-load voltage, power supply voltage and consumed current, and the power supply module provides power supply to the no-load +12V, +12V and the grounding port of the external interface on the shell panel.
The 3 local oscillation signal output ends of the signal generator, namely local oscillation 1, local oscillation 2, local oscillation 3 and 3 analog signal output ends, namely analog 1, analog 2 and analog 3, are respectively connected with 3 local oscillation signal input ends and 3 analog signal input ends of the radio frequency switch, 3 paths of local oscillation signals and 3 paths of analog signals are in one-to-one correspondence to form 3 paths of frequency point signals, and the gating output of the 3 paths of frequency point signals is controlled by respectively corresponding to three instruction positions of F1, F2 and F3 through a frequency switching knob on a shell panel; the analog signal output end of the radio frequency switch is connected with the input end of the numerical control attenuator, and the local oscillator signal output end of the radio frequency switch is connected with the LO output port of the test control device; the RF output port of the numerical control attenuator is connected with the RF output port of the test control device.
When the testing device works specifically, the radio frequency switch and the signal generating unit are controlled through the frequency switching knob, so that under the instruction of F1, a simulation 1 signal and a local oscillator 1 signal can be gated, the simulation 1 signal enters the numerical control attenuator and passes through the attenuation uniform adjustment button of the shell panel to adjust different attenuation values and is transmitted to the RF output port of the testing control device through the RF output port, the local oscillator 1 signal is directly transmitted to the LO output port of the testing control device, and under the instruction action of F2 and F3, the output of simulation 2 and 3 signals and local oscillators 2 and 3 signals is controlled in a similar way, so that the aim of testing different frequency points (F1, F2 and F3) is achieved, and meanwhile, the testing conditions of technical parameters are realized.
The measuring unit comprises a spectrum analyzer and a noise coefficient analyzer; and the spectrum analyzer measures the output signal and detects the transmission coefficient, the output frequency and the upper limit of linearity.
When in use, the frequency doubling and mixing preamplification module is connected with the test control device and the spectrum analyzer; the +12V output on the shell panel of the test control device is connected with a +12V power port of the frequency doubling and mixing pre-amplification module, an RF output port of the test control device is connected to an RF port of the frequency doubling and mixing pre-amplification module, and an LO output port of the test control device is connected to an LO port of the frequency doubling and mixing pre-amplification module; setting the test control device to be in an initial state, switching the frequency of the knob to be off, and uniformly adjusting the attenuation to the actually required calibration value.
+12V consumption current test:
and switching on a power supply control and indication switch, and reading the +12V consumption current.
And (3) output frequency testing:
and respectively setting frequency switching knobs to F1, F2 and F3 commands, so that the frequency point signals respectively enter an RF output port of the test control device and an LO output port of the test control device, and reading the frequency value by using a spectrum analyzer.
And (3) transmission coefficient testing:
and (3) performing attenuation equalization to an actually required calibration value through an attenuation equalization button, and measuring the output signal power P1 when the F2 frequency point is measured, wherein the | -50-P1| is the transmission coefficient when the frequency point is the number.
Upper linear limit:
setting a frequency switching knob to an instruction F2, reducing attenuation and uniform adjustment, testing the signal power of an IF port of the frequency doubling and mixing preamplifier module, and searching for P-1The power value of (c).
And connecting a noise signal output end of the noise coefficient analyzer to an RF port of a frequency doubling and mixing pre-amplification module, connecting an input end of the noise coefficient analyzer to an IF port, respectively setting frequency switching knobs to F1, F2 and F3 instructions, and measuring the noise coefficient at the frequency point.
The present invention is not described in detail in the prior art.
The embodiments selected for the purpose of disclosing the utility model, are presently considered to be suitable, it being understood, however, that the utility model is intended to cover all variations and modifications of the embodiments falling within the scope of the inventive concept and the utility model.
Claims (4)
1. A frequency multiplication and mixing preamplification module test platform is characterized in that: the device comprises a test control device connected with the input end of a frequency doubling and mixing preamplification module and a measurement unit connected with the output end of the frequency doubling and mixing preamplification module;
the test control device comprises a signal generator, a radio frequency switch, a numerical control attenuator and a power supply module, wherein the signal generator, the radio frequency switch, the numerical control attenuator and the power supply module are integrated in the shell;
a plurality of local oscillator signal output ends and a plurality of analog signal output ends of the signal generator are respectively connected with a plurality of local oscillator signal input ends and a plurality of analog signal input ends of the radio frequency switch, the analog signal output end of the radio frequency switch is connected with the input end of the numerical control attenuator, and the local oscillator signal output end of the radio frequency switch is connected with an LO output port of the test control device; the output port of the numerical control attenuator is connected with the RF output port of the test control device;
the measuring unit comprises a spectrum analyzer and a noise coefficient analyzer.
2. The frequency-doubled frequency-mixed pre-amplification module test platform of claim 1, wherein: the power supply module realizes power supply control of the test platform through power supply control and an indication switch of the shell panel, a display parallel port of the power supply module is connected with a digital display screen on the shell panel to display no-load voltage, power supply voltage and consumed current, and the power supply module provides power supply external interfaces with no load of +12V, +12V and a grounding port on the shell panel.
3. The frequency-doubled frequency-mixed pre-amplification module test platform of claim 1, wherein: the multi-channel local oscillation signals and the multi-channel analog signals output by the signal generator are connected into the radio frequency switch, the corresponding one-channel local oscillation signals and one-channel analog signals jointly form one-channel frequency point signals, the radio frequency switch controls the radio frequency switch and the signal generator through a frequency switching knob on a shell panel, gating output of the multi-channel frequency point signals is controlled, and switching of the testing frequency points is achieved.
4. The frequency-doubled frequency-mixed pre-amplification module test platform of claim 1, wherein: the numerical control attenuator adjusts the input analog signals to different attenuation values through a plurality of attenuation uniform adjusting buttons on the panel of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122360852.XU CN215835403U (en) | 2021-09-28 | 2021-09-28 | Frequency multiplication and mixing pre-amplification module test platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122360852.XU CN215835403U (en) | 2021-09-28 | 2021-09-28 | Frequency multiplication and mixing pre-amplification module test platform |
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| Publication Number | Publication Date |
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| CN215835403U true CN215835403U (en) | 2022-02-15 |
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| CN202122360852.XU Active CN215835403U (en) | 2021-09-28 | 2021-09-28 | Frequency multiplication and mixing pre-amplification module test platform |
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- 2021-09-28 CN CN202122360852.XU patent/CN215835403U/en active Active
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