CN108988966A - A kind of test method of short-wave radio set noise elimination performance - Google Patents
A kind of test method of short-wave radio set noise elimination performance Download PDFInfo
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- CN108988966A CN108988966A CN201810849322.1A CN201810849322A CN108988966A CN 108988966 A CN108988966 A CN 108988966A CN 201810849322 A CN201810849322 A CN 201810849322A CN 108988966 A CN108988966 A CN 108988966A
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- noise elimination
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/29—Performance testing
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- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The present invention relates to a kind of test methods of short-wave radio set noise elimination performance, by increasing a kind of interference signal in the standard signal that single-tone is modulated, to constitute two-tone modulation signal.The modulation degree of verbal audio modulated signal and the ratio of interference tones modulated signal modulation degree are defined as noise elimination inhibition ratio when product is in the critical state for keeping noise elimination.When the parameter is less than 3, show that the setting of noise elimination thresholding is relatively low, radio station noise elimination under complex electromagnetic environment is easily caused to fail, when the parameter is greater than 3, show that the setting of noise elimination thresholding is higher, radio station is easily caused to receive unsmooth, adjustment noise elimination threshold circuit inhibits noise elimination than being equal to 3 to achieve the purpose that adjust radio station noise elimination ability.The present invention can quantify noise elimination test result, and radio station can effectively be repaired than parameter by proposing noise elimination inhibition.
Description
Technical field
The present invention relates to short-wave radio set testing field, specifically a kind of test method of short-wave radio set noise elimination performance.
Background technique
Short-wave radio set is generally demodulated using frequency discriminator, and frequency discriminator inputs frequency separation useful signal according to signal and makes an uproar with background
Sound signal, frequency discriminator are parabolically distributed with the power spectrum of output noise, as the increase square of output frequency increases, because
This, can export noise by a relatively large margin when without useful input signal, need to handle noise using squelch circuit, in nothing
When audio signal input or very weak signal, cutting output keeps the peace and quiet of earphone.For aircraft, pilot passes through shortwave
Radio station and control tower carry out voice communication, if pilot just can not be in noisy flying ring without good noise elimination performance
It is accurately linked up with control tower in border, may induce aircraft accident.
It is directed to the test of short-wave radio set noise elimination performance at present, only uses the quality of standard signal qualitative examination noise elimination function,
Quantitative analysis can not be carried out to the degree of noise elimination, this causes radio station in actual use often due to the interference of noise, to go out
The case where existing noise elimination failure.
Summary of the invention
Technical problem to be solved by the present invention lies in a kind of test method of short-wave radio set noise elimination performance is proposed, solve
Existing test method can not carry out the drawbacks of quantitative test and analysis to noise elimination degree.
The technical problems to be solved by the invention are realized using following technical scheme:
A kind of test method of short-wave radio set noise elimination performance, which is characterized in that comprising steps of
A) to the radiofrequency signal of the antenna port of short-wave radio set input two-tone modulation；
B) input signal is adjusted, observation noise elimination function opens situation, and record noise elimination inhibits ratio.
The step a) includes:
A1 the current working frequency points of short-wave radio set, amplitude) are set by the rf frequency of radio comprehensive parameter tester
It is set as 50 μ V；
It a2 is) 400Hz by " voice modulation 1 " set of frequency of radio comprehensive parameter tester, modulation degree is set as
10%；
It a3 is) 3000Hz by " voice modulation 2 " set of frequency of radio comprehensive parameter tester, modulation degree is set as
10%；
A4 the output of radio comprehensive parameter tester radio frequency) is opened, radiofrequency signal is input to the input of short-wave radio set radio frequency
Interface.
The step b) includes:
B1 it) is slowly increased the modulation degree of " voice modulation 1 ", when noise-limited condition is closed, stops the modulation of " voice modulation 1 "
The adjustment of degree；
B2 the ratio of current " voice modulation 1 " and " voice modulation 2 " modulation degree) is recorded as noise elimination and inhibits ratio, if noise elimination
Inhibit than being greater than 3 it can be inferred that current noise elimination thresholding is higher, if noise elimination inhibits ratio less than 3, it can be inferred that current noise elimination door
It limits relatively low；
B3) adjustment noise elimination threshold circuit inhibits noise elimination than being equal to 3.
The step a2) in use " voice modulation 1 " output signal simulation voice signal.
The step a3) in use " voice modulation 2 " output signal simulation noise signal.
The beneficial effects of the present invention are:
By the way that two kinds of language, interference modulated signals are respectively set to noise on simulated flight person's voice and machine, realize
The test of radio station noise elimination performance, and inhibit comparison noise suppressed degree to be quantified with the noise elimination of original creation；
The adjustment of radio station noise elimination performance can be effectively instructed, improves and repairs reliability.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is signal testing schematic diagram of the invention.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below it is right
The present invention is further described.
In traditional noise elimination test, single use standard signal inputs short-wave radio set, detects radio station noise elimination performance, this side
Formula can only qualitatively judge noise elimination performance quality, can not inhibit to provide quantitative parameter to adjustment noise elimination is repaired.
For the noise elimination ability for quantifying short-wave radio set, method proposed by the present invention increases by one in the standard signal that single-tone is modulated
Kind interference signal, to constitute two-tone modulation signal.Verbal audio modulated signal when product is in the critical state for keeping noise elimination
Modulation degree and interference tones modulated signal modulation degree ratio be defined as noise elimination inhibit ratio.When the parameter is less than normal, show noise elimination
Thresholding setting is relatively low, and radio station noise elimination under complex electromagnetic environment is easily caused to fail, and when the parameter is bigger than normal, shows that the setting of noise elimination thresholding is inclined
Height easily causes radio station to receive unsmooth.
Signal testing schematic diagram as shown in Figure 1:
Using communication synthesis parameter tester setting verbal audio signal and interference tones signal imitation pilot voice and
Two kinds of sound-source signals of noise on machine, generated by carrier signal two kinds of test signals are modulated be input in short-wave radio set into
Row test, testing procedure include:
A) to the radiofrequency signal of the antenna port of short-wave radio set input two-tone modulation；
B) input signal is adjusted, observation noise elimination function opens situation, and record noise elimination inhibits ratio.
Further, the step a) includes:
A1 the current working frequency points of short-wave radio set, amplitude) are set by the rf frequency of radio comprehensive parameter tester
It is set as 50 μ V；
It a2 is) 400Hz by " voice modulation 1 " set of frequency of radio comprehensive parameter tester, modulation degree is set as
10%；
It a3 is) 3000Hz by " voice modulation 2 " set of frequency of radio comprehensive parameter tester, modulation degree is set as
10%；
A4 the output of radio comprehensive parameter tester radio frequency) is opened, radiofrequency signal is input to the input of short-wave radio set radio frequency
Interface.
Further, the step b) includes:
B1 it) is slowly increased the modulation degree of " voice modulation 1 ", when noise-limited condition is closed, stops the modulation of " voice modulation 1 "
The adjustment of degree；
B2 the ratio of current " voice modulation 1 " and " voice modulation 2 " modulation degree) is recorded as noise elimination and inhibits ratio, if noise elimination
Inhibit that normal speech signals may be filtered out than being greater than 3 it can be inferred that currently noise elimination thresholding is higher, does not cause voice discontinuously not
Freely, if noise elimination inhibits ratio less than 3, it can be inferred that current noise elimination thresholding is relatively low, it will cause noise elimination energy under complex electromagnetic environment
Power failure；
B3) adjustment noise elimination threshold circuit inhibits noise elimination than being equal to 3.
The step a2) in use " voice modulation 1 " output signal simulation pilot's voice signal.
The step a3) in use " voice modulation 2 " output signal simulation aircraft run when machine on noise.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention
Principle, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these variation and
Improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent
Object defines.
Claims (5)
1. a kind of test method of short-wave radio set noise elimination performance, which is characterized in that comprising steps of
A) to the radiofrequency signal of the antenna port of short-wave radio set input two-tone modulation；
B) input signal is adjusted, observation noise elimination function opens situation, and record noise elimination inhibits ratio.
2. a kind of test method of short-wave radio set noise elimination performance according to claim 1, it is characterised in that: the step a)
Include:
A1 the current working frequency points of short-wave radio set, amplitude setting) are set by the rf frequency of radio comprehensive parameter tester
For 50 μ V；
It a2 is) 400Hz by " voice modulation 1 " set of frequency of radio comprehensive parameter tester, modulation degree is set as 10%；
It a3 is) 3000Hz by " voice modulation 2 " set of frequency of radio comprehensive parameter tester, modulation degree is set as 10%；
A4 the output of radio comprehensive parameter tester radio frequency) is opened, radiofrequency signal is input to short-wave radio set rf input interface.
3. a kind of test method of short-wave radio set noise elimination performance according to claim 1, it is characterised in that: the step b)
Include:
B1 it) is slowly increased the modulation degree of " voice modulation 1 ", when noise-limited condition is closed, stops the modulation degree of " voice modulation 1 "
Adjustment；
B2 the ratio of current " voice modulation 1 " and " voice modulation 2 " modulation degree) is recorded as noise elimination and inhibits ratio, if noise elimination inhibits
Than being greater than 3 it can be inferred that current noise elimination thresholding is higher, if noise elimination inhibits ratio less than 3, it can be inferred that current noise elimination thresholding is inclined
It is low；
B3) adjustment noise elimination threshold circuit inhibits noise elimination than being equal to 3.
4. a kind of test method of short-wave radio set noise elimination performance according to claim 2, it is characterised in that: the step
A2 the output signal simulation voice signal of " voice modulation 1 " is used in).
5. a kind of test method of short-wave radio set noise elimination performance according to claim 2, it is characterised in that: the step
A3 the output signal simulation noise signal of " voice modulation 2 " is used in).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810849322.1A CN108988966B (en) | 2018-07-28 | 2018-07-28 | Method for testing squelch performance of short-wave radio station |
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| CN201810849322.1A CN108988966B (en) | 2018-07-28 | 2018-07-28 | Method for testing squelch performance of short-wave radio station |
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| CN108988966A true CN108988966A (en) | 2018-12-11 |
| CN108988966B CN108988966B (en) | 2021-04-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112953572A (en) * | 2021-01-22 | 2021-06-11 | 成都天奥信息科技有限公司 | Low-delay small-jitter radio station squelch method |
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| CN103326798A (en) * | 2013-06-26 | 2013-09-25 | 惠州市德赛西威汽车电子有限公司 | Test circuit conducting test on performance of products for restraining multi-path signal interference |
| CN204272108U (en) * | 2014-12-18 | 2015-04-15 | 陕西烽火实业有限公司 | A kind ofly can support the communicator of ultrashort wave relaying with short-wave radio set intercommunication |
| CN205336536U (en) * | 2015-12-30 | 2016-06-22 | 陕西烽火实业有限公司 | Measurement device for short -wave radio set speaker |
-
2018
- 2018-07-28 CN CN201810849322.1A patent/CN108988966B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326798A (en) * | 2013-06-26 | 2013-09-25 | 惠州市德赛西威汽车电子有限公司 | Test circuit conducting test on performance of products for restraining multi-path signal interference |
| CN204272108U (en) * | 2014-12-18 | 2015-04-15 | 陕西烽火实业有限公司 | A kind ofly can support the communicator of ultrashort wave relaying with short-wave radio set intercommunication |
| CN205336536U (en) * | 2015-12-30 | 2016-06-22 | 陕西烽火实业有限公司 | Measurement device for short -wave radio set speaker |
Non-Patent Citations (1)
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| 百度文库: "广州海格通信股份有限公司企业标准Q/HGTX11-2018 EXP5300型甚高频低空通信电台产品标准", 《百度文库》 * |
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|---|---|---|---|---|
| CN112953572A (en) * | 2021-01-22 | 2021-06-11 | 成都天奥信息科技有限公司 | Low-delay small-jitter radio station squelch method |
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