CN204539356U - 8G microwave radio detector - Google Patents
8G microwave radio detector Download PDFInfo
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- CN204539356U CN204539356U CN201520307084.3U CN201520307084U CN204539356U CN 204539356 U CN204539356 U CN 204539356U CN 201520307084 U CN201520307084 U CN 201520307084U CN 204539356 U CN204539356 U CN 204539356U
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Abstract
The utility model relates to a kind of 8G microwave radio detector, comprise decay power splitter, high section frequency converter, low section of frequency converter and power supply, power splitter of wherein decaying gathers radiofrequency signal by the microwave equipment being located at base station, the output of decay power splitter is connected to high section frequency converter and low section of frequency converter respectively, and the output signal of high section frequency converter and low section of frequency converter is connected to display device respectively as high section and low section of two-way test signal; Power supply is connected to decay power splitter, high section frequency converter, low section of frequency converter working power end respectively.The utility model is simple to operate, without the need to manually inputting multiple parameter, test data directly exports, do not need last phase tidying up, whole test period is consuming time short, and operating efficiency is high, brings great convenience to the maintenance of microwave equipment, be applicable to all 8G microwave relay stations use, test index is accurate, stable, reliable.
Description
Technical field
The utility model relates to the RF Technology for Measuring in broadcast television signal field, specifically a kind of 8G microwave radio detector.
Background technology
8G microwave radio signal is applied in broadcast TV program signal transmission technology, the detection of radio-frequency technique index is most important to laser propagation effect, that radio and television broadcast the requisite checkout equipment of transport service department, can monitor in real time on the one hand, on the other hand can as the important examination data of monthly test, season inspection and annual test, key is played a part to the monitoring of the transmission quality of transmission broadcast TV program signal and signal regeneration.
Detection mode general at present adopts full range sweep generator to carry out segmentation detection, and full range sweep generator is not the special testing apparatus of broadcast TV program signal, its complex operation, need the multiple parameter of artificial input, test data layering is gone forward one by one, test data also needs last phase tidying up, whole test period length consuming time, efficiency is low.
Utility model content
For in prior art, the deficiencies such as test period length consuming time, efficiency are low are existed to the detection of broadcast TV program signal transmission effect, the technical problems to be solved in the utility model be to provide a kind of simple to operate, test period is short and effect 8G microwave radio detector intuitively.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
The utility model 8G microwave radio detector, comprise decay power splitter, high section frequency converter, low section of frequency converter and power supply, power splitter of wherein decaying gathers radiofrequency signal by the microwave equipment being located at base station, the output of decay power splitter is connected to high section frequency converter and low section of frequency converter respectively, and the output signal of high section frequency converter and low section of frequency converter is connected to display device respectively as high section and low section of two-way test signal; Power supply is connected to decay power splitter, high section frequency converter, low section of frequency converter working power end respectively.
Described high section frequency converter comprises frequency mixer and high this frequency of section oscillator, wherein high section of this frequency oscillator produces 9300MHz local oscillation signal, the signal that frequency mixer receiving attenuation power splitter exports and the local oscillation signal that high this frequency of section oscillator produces carry out mixing, and difference goes out test signal and delivers to display device.
Described low section of frequency converter comprises frequency mixer and low section of this frequency oscillator, wherein low section of this frequency oscillator produces 9000MHz local oscillation signal, the local oscillation signal of the signal that frequency mixer receiving attenuation power splitter exports and low section of this frequency oscillator generation carries out mixing, and difference goes out test signal and delivers to display device.
High this frequency of section oscillator and low section of this frequency oscillator all adopt the IC phase-locked loop LMX2531 series module of NATIONALSEMICONDUCTOR company.
Be wholy set in shielded box.
The utility model has following beneficial effect and advantage:
1. the utility model is owing to adopting radio and television down-conversion technique, and it is simple to operate, and without the need to manually inputting multiple parameter, test data directly exports, and does not need last phase tidying up, and whole test period is consuming time short, and operating efficiency is high.
2. the utility model provides display interface, and test result can be made intuitively to show, and facilitates staff's read test data and analyzes data waveform, reliable and stable, brings great convenience to the maintenance of microwave equipment.
3. the utility model can when not having high-end frequency spectrograph, utilize this tester and 2G frequency spectrograph can detect the spectrum waveform of signal accurately, promptly can determine trouble location, reduce the difficulty of maintenance work, very large help is provided to the safe and high qualified transmission of signal.
4. can realizing carrying out frequency conversion to transmitting microwave signal by the utility model, just can be tested the microwave spectrum signal of 8G by 2G spectrum measurement instrument, be applicable to all 8G microwave relay stations and use, test index is accurate, stable, reliable.
Accompanying drawing explanation
Fig. 1 is the utility model electrical structure block diagram;
Fig. 2 is power divider structure block diagram of decaying in the utility model;
Fig. 3 is high section frequency changer block diagram in the utility model;
Fig. 4 is low section of frequency changer block diagram in the utility model;
Fig. 5 is the utility model test microwave spectrum signal connection layout;
Fig. 6 connects satellite receiver demodulated digital signal connection layout for utilizing the utility model.
Embodiment
Below in conjunction with Figure of description, the present invention is further elaborated.
As shown in Figure 1, a kind of 8G microwave radio of the utility model detector comprises decay power splitter, high section frequency converter, low section of frequency converter and power supply, power splitter of wherein decaying gathers radiofrequency signal by the microwave equipment being located at base station, the output of decay power splitter is connected to high section frequency converter and low section of frequency converter respectively, and the output signal of high section frequency converter and low section of frequency converter is connected to display device respectively as high section and low section of two-way test signal; Power supply is connected to decay power splitter, high section frequency converter, low section of frequency converter working power end respectively.
Microwave radio signal is linked into decay power splitter, and decay power splitter is made up of input isolator, band pass filter, output isolator.The formation block diagram of decay power splitter as shown in Figure 2, the bandwidth characteristic of input isolator satisfaction guaranted, radio frequency band filter is the pre-selected passages of radiofrequency signal, not only need to be with interior Insertion Loss little, amplitude-frequency response is good, also want Out-of-band rejection ability strong, whether its quality determines the indexs such as low-converter mirror image suppresses, intermediate frequency suppresses, local oscillator leaks, combination interference suppression and is achieved.To useless frequency, provide enough suppression, export isolator and can provide good Broadband Matching between radio frequency band filter and frequency mixer.
Input isolator exports two-way and accesses low section of (7700MHz ~ 8000MHz) radio frequency band filter and high section (8000MHz ~ 8300MHz) radio frequency band filter respectively, and the two-way exported by radio frequency band filter accesses the input of two frequency converters respectively by exporting isolator.
As shown in Figure 3, high section frequency converter comprises frequency mixer and high this frequency of section oscillator, wherein high section of this frequency oscillator produces 9300MHz local oscillation signal, the signal that frequency mixer receiving attenuation power splitter exports and the local oscillation signal that high this frequency of section oscillator produces carry out mixing, and difference goes out test signal and delivers to display device.
When input radio frequency signal is high section 8000MHz ~ 8300MHz signal, by being the local vibration source mixing of 9300MHz with local frequency, exporting this Zhen of=– input radio frequency according to intermediate frequency, obtaining exporting the intermediate-freuqncy signal for 1000MHz ~ 1300MHz.
As shown in Figure 4, low section of frequency converter comprises frequency mixer and low section of this frequency oscillator, wherein low section of this frequency oscillator produces 9000MHz local oscillation signal, the local oscillation signal of the signal that frequency mixer receiving attenuation power splitter exports and low section of this frequency oscillator generation carries out mixing, and difference goes out test signal and delivers to display device.
When input radio frequency signal is low section of 7700MHz ~ 8000MHz signal, by being the local vibration source mixing of 9000MHz with local frequency, exporting this Zhen of=– input radio frequency according to intermediate frequency, obtaining exporting the intermediate-freuqncy signal for 1000MHz ~ 1300MHz.
High this frequency of section oscillator and low section of this frequency oscillator all adopt the IC phase-locked loop LMX2531 series module of NATIONALSEMICONDUCTOR company.LMX2531 is the phase-locked loop of chip-scale, because adopting fractional frequency division pattern, phase demodulation frequency is higher, make an uproar better in the device band of relative integral frequency divisioil mutually, compensate for the inferior position that inner integrated VCO performance is general, simultaneously because loop filter loop bandwidth is relatively wide, more responsive to the signal quality of reference signal.
LMX2531 inside is integrated with parametric frequency divider, programmable frequency divider, phase discriminator, third and fourth rank loop filter, warning circuit, ultra-low noise LDO and suppresses the circuit of fractional stray, powerful, encapsulation is less, require lower to DC power supply noise objective.
Frequency converter is that mixing produces intermediate frequency by local oscillator (abbreviation local oscillator) and radiofrequency signal, the leading indicator of local oscillator has frequency range, frequency resolution, phase noise, power output, spuious etc., phase noise is a vital index of local oscillator and even whole frequency converter, and the noise restraint of local oscillator determines the spectral purity of whole local oscillator.Frequency mixer is the critical component realizing spectral conversion in frequency converter, the frequency mixer selecting a low conversion loss, high-isolation, suppression distortion ability strong to its technical index realize essential; Intermediate-frequency filter is mainly in order to suppress the input noise of monkey chatter and minimizing rear end demodulated equipment, and in its band, amplitude-frequency characteristic and Out-of-band rejection ability produce significant impact to the demodulation of digital intermediate frequency signal.The utility model, in order to adapt to the needs of 8GHz microwave high station and low station, have employed two frequency conversion systems, can test high section (8000MHz ~ 8300MHz) and low section (7700MHz ~ 8000MHz) respectively.
When using the utility model, when input radio frequency signal is low section of 7700MHz ~ 8000MHz signal, should at low section of frequency converter delivery outlet 2 detection signal, when input radio frequency signal is high section 8000MHz ~ 8300MHz signal, should at high section frequency converter delivery outlet 1 detection signal, this is because in decay power splitter, the frequency range of radio frequency band filter is determined.
The utility model adopts the Switching Power Supply that performance is good, and exchange input 220V, direct current exports 12V, in order to frequency converter steady operation can be made, the voltage that power requirement exports and electric current will ensure each parts capacity used, and the current ripples of output requires in μ V level, to ensure the spectral purity of local oscillator.
Microwave signal is linked into input of the present utility model by cable, and output is received 2G frequency spectrograph and detected 8G microwave signal frequency spectrum or digital satellite receiver demodulation detection audio-video signal.
When utilizing the utility model to test microwave spectrum signal, can connect by Fig. 5.The input that mixer output signal or power amplifier output signal (should decay to and be less than-6dBm) are connected to detector will be transmitted, if 7700MHz ~ 8000MHz signal, the connecting line being connected to frequency spectrograph is received test signal and is exported 2 mouthfuls, if 8000MHz ~ 8300MHz signal, the connecting line being connected to frequency spectrograph is received test signal and is exported 1 mouthful.
Output signal of the present utility model is except can being supplied to frequency spectrograph test frequency spectrum, and output signal also can be supplied to digital satellite receiver and demodulate Audio and Video.When utilizing the utility model to connect satellite receiver demodulated digital signal, can connect by Fig. 6.The input that mixer output signal or power amplifier output signal (should decay to and be less than-6dBm) are connected to detector will be transmitted, if 7700MHz ~ 8000MHz signal, the connecting line being connected to satellite receiver signal input is received test signal and is exported 2 mouthfuls, utilizes satellite receiver search to demodulate audio and video frequency signal.If 8000MHz ~ 8300MHz signal, the connecting line being connected to satellite receiver signal input is received test signal and is exported 1 mouthful, utilizes satellite receiver search to demodulate audio and video frequency signal.
The utility model is wholy set in shielded box.In the present embodiment, shielded box adopts alloy aluminum frame structure, when making 8G microwave radio detector be in site environment, can avoid the interference of electromagnetic field preferably.
Claims (5)
1. a 8G microwave radio detector, it is characterized in that: comprise decay power splitter, high section frequency converter, low section of frequency converter and power supply, power splitter of wherein decaying gathers radiofrequency signal by the microwave equipment being located at base station, the output of decay power splitter is connected to high section frequency converter and low section of frequency converter respectively, and the output signal of high section frequency converter and low section of frequency converter is connected to display device respectively as high section and low section of two-way test signal; Power supply is connected to decay power splitter, high section frequency converter, low section of frequency converter working power end respectively.
2. by 8G microwave radio detector according to claim 1, it is characterized in that: described high section frequency converter comprises frequency mixer and high this frequency of section oscillator, wherein high section of this frequency oscillator produces 9300MHz local oscillation signal, the signal that frequency mixer receiving attenuation power splitter exports and the local oscillation signal that high this frequency of section oscillator produces carry out mixing, and difference goes out test signal and delivers to display device.
3. by 8G microwave radio detector according to claim 1, it is characterized in that: described low section of frequency converter comprises frequency mixer and low section of this frequency oscillator, wherein low section of this frequency oscillator produces 9000MHz local oscillation signal, the local oscillation signal of the signal that frequency mixer receiving attenuation power splitter exports and low section of this frequency oscillator generation carries out mixing, and difference goes out test signal and delivers to display device.
4. by 8G microwave radio detector described in Claims 2 or 3, it is characterized in that: high this frequency of section oscillator and low section of this frequency oscillator all adopt the IC phase-locked loop LMX2531 series module of NATIONAL SEMICONDUCTOR company.
5., by 8G microwave radio detector according to claim 1, it is characterized in that: be wholy set in shielded box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520307084.3U CN204539356U (en) | 2015-05-13 | 2015-05-13 | 8G microwave radio detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520307084.3U CN204539356U (en) | 2015-05-13 | 2015-05-13 | 8G microwave radio detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204539356U true CN204539356U (en) | 2015-08-05 |
Family
ID=53753312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520307084.3U Expired - Fee Related CN204539356U (en) | 2015-05-13 | 2015-05-13 | 8G microwave radio detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204539356U (en) |
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2015
- 2015-05-13 CN CN201520307084.3U patent/CN204539356U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 Termination date: 20160513 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |