CN107613274A - A kind of application method of single output optical fibre tuner - Google Patents
A kind of application method of single output optical fibre tuner Download PDFInfo
- Publication number
- CN107613274A CN107613274A CN201711042530.2A CN201711042530A CN107613274A CN 107613274 A CN107613274 A CN 107613274A CN 201711042530 A CN201711042530 A CN 201711042530A CN 107613274 A CN107613274 A CN 107613274A
- Authority
- CN
- China
- Prior art keywords
- module
- amplification module
- output end
- low noise
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Abstract
The invention discloses a kind of application method of single output optical fibre tuner, comprise the following steps：TV fiber-optic signal converts optical signals into electric signal by photoelectric switching circuit, suitable impedance is converted electrical signals to after impedance matching circuit, after through low noise amplification module amplification and bandpass filtering modules block suppress interference after, it is mixed through frequency mixer with being controlled by a controller the local oscillation signal as caused by phaselocked loop and oscillator, is exported again after the amplification of intermediate frequency amplification module afterwards；And in whole process, signal magnitude and transmission to controller, the controller in power detection module detection signal transmission path adjust the gain of low noise amplification module, high frequency amplifying module and intermediate frequency amplification module according to signal magnitude.The present invention is adjusted according to gain of the actual conditions to low noise amplification module, high frequency amplifying module and intermediate frequency amplification module.
Description
Technical field
The present invention relates to a kind of application method of single output optical fibre tuner.
Background technology
In recent years, due to optical fiber and optical device, the significantly downslide of light device price, especially transmission loss index is big
Big optimization, various regions broadcasting and TV Transmission Co., Ltd proceed by the construction of all optical network.After i.e. broadcasting and TV optical signal transmission reaches cell, no longer turn
It is changed to electric signal and enters coaxial cable distribution net network, but directly optical signal is allocated, optical fiber directly arrives family, in user family
In recycle small light receiver device to carry out opto-electronic conversion, Transmission system no longer needs substantial amounts of amplifier, and reduces pair
Its requirement being powered, not only greatly reduce the generation of the loss of signal and interference, reliability, the maintainability of Transmission system
Greatly promoting, construction cost and maintenance cost substantially reduce, and because the anti-interference of optical fiber transmission is much stronger than cable transmission,
And transmission bandwidth is wider, more programme informations can be transmitted to user's family, including tens sets of high-definition television programs, utilize ripple
Divide multiplexing technology to realize the bi-directionally transmitted of uplink and downlink signals, meet three nets that client is surfed the Net by CHINA RFTCOM Co Ltd and melt
Close and require, therefore broadcasting and TV fiber entering household is widely popularized throughout the country, and newly-built community broadcasting and TV were also become in 2015
The professional standard of networking.In order to not waste the resource of original CATV set-top-box, broadcasting and TV Transmission Co., Ltd is needed to these
The client for being continuing with CATV set-top-box is equipped with an external small light receiver terminal equipment, and the intelligent acess light connects
After receiving machine equipment, cable of cable TV signal is converted to, the input of former CATV set-top-box is transferred to through coaxial cable, passed through
Standard television signal, which is converted to, after tuning, demodulation, decoding carries out program viewing.But existing single output optical fibre with tuner simultaneously
Signal magnitude will not be adjusted according to actual conditions.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of user of single output optical fibre tuner
Method.
The purpose of the present invention is achieved through the following technical solutions：A kind of user of single output optical fibre tuner
Method, described tuner include photoelectric conversion module, impedance matching module, low noise amplification module, bandpass filtering modules block, high frequency
Amplification module, frequency mixer, oscillator, phaselocked loop, intermediate frequency amplification module, controller and power detection module, described low noise
Amplification module, high frequency amplifying module and intermediate frequency amplification module are adjustable gain amplification module；Photoelectric conversion module receives outside
Optical fiber input signal, the output end of photoelectric conversion module are connected with impedance matching module, the output end of impedance matching module with it is low
Noise amplification module is connected, and the output end of low noise amplification module is connected with bandpass filtering modules block, the output of bandpass filtering modules block
End is connected with high frequency amplifying module, and the output end of high frequency amplifying module is connected with frequency mixer, the phaselocked loop voltage control of controller
Output end is connected with phaselocked loop, and the output end of phaselocked loop is connected with oscillator, and the output end of oscillator is connected with frequency mixer, mixing
The output end of device is connected with intermediate frequency amplification module, the output end output intermediate-freuqncy signal of intermediate frequency amplification module；Described power detection
Signal magnitude in module detection signal transmission path is simultaneously sent to controller, the gain-adjusted output end of controller respectively with it is low
Noise amplification module, high frequency amplifying module connect with intermediate frequency amplification module；
Described method comprises the following steps：
TV fiber-optic signal converts optical signals into electric signal by photoelectric switching circuit, by electric signal after impedance matching circuit
Be converted to suitable impedance, after through low noise amplification module amplification and bandpass filtering modules block suppress interference after, with being controlled
The local oscillation signal as caused by phaselocked loop and oscillator of device control is mixed through frequency mixer, afterwards again after the amplification of intermediate frequency amplification module
Output；And in whole process, signal magnitude and transmission in power detection module detection signal transmission path are controlled to controller
Device processed adjusts the gain of low noise amplification module, high frequency amplifying module and intermediate frequency amplification module according to signal magnitude.
Further, described low noise amplification module includes the low-noise amplifier of two series connection.
The beneficial effects of the invention are as follows：The present invention according to actual conditions to low noise amplification module, high frequency amplifying module and
The gain of intermediate frequency amplification module is adjusted, specifically：TV fiber-optic signal is converted optical signals into by photoelectric switching circuit
Electric signal, suitable impedance is converted electrical signals to after impedance matching circuit, after through low noise amplification module amplification and
After bandpass filtering modules block suppresses interference, with being controlled by a controller as caused by phaselocked loop and oscillator local oscillation signal through frequency mixer
Mixing, exported again after the amplification of intermediate frequency amplification module afterwards；And in whole process, power detection module detection signal transmission road
Signal magnitude and transmission to controller, controller on footpath adjusts low noise amplification module, High frequency amplification mould according to signal magnitude
The gain of block and intermediate frequency amplification module.
Brief description of the drawings
The circuit block diagram for the tuner that Fig. 1 is relied on by the inventive method.
Embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings：A kind of single output optical fibre tuner makes
With method, as shown in figure 1, described tuner includes photoelectric conversion module, impedance matching module, low noise amplification module, band
Pass filtering module, high frequency amplifying module, frequency mixer, oscillator, phaselocked loop, intermediate frequency amplification module, controller and power detection mould
Block, described low noise amplification module, high frequency amplifying module and intermediate frequency amplification module are adjustable gain amplification module；Photoelectricity turns
Mold changing block receives external fiber input signal, and the output end of photoelectric conversion module is connected with impedance matching module, impedance matching mould
The output end of block is connected with low noise amplification module, and the output end of low noise amplification module is connected with bandpass filtering modules block, band logical
The output end of filtration module is connected with high frequency amplifying module, and the output end of high frequency amplifying module is connected with frequency mixer, controller
Phaselocked loop voltage control output end is connected with phaselocked loop, and the output end of phaselocked loop is connected with oscillator, the output end of oscillator with
Frequency mixer is connected, and the output end of frequency mixer is connected with intermediate frequency amplification module, the output end output intermediate-freuqncy signal of intermediate frequency amplification module；
Signal magnitude in described power detection module detection signal transmission path is simultaneously sent to controller, the gain-adjusted of controller
Output end is connected with low noise amplification module, high frequency amplifying module and intermediate frequency amplification module respectively；
Described method comprises the following steps：
TV fiber-optic signal converts optical signals into electric signal by photoelectric switching circuit, by electric signal after impedance matching circuit
Be converted to suitable impedance, after through low noise amplification module amplification and bandpass filtering modules block suppress interference after, with being controlled
The local oscillation signal as caused by phaselocked loop and oscillator of device control is mixed through frequency mixer, afterwards again after the amplification of intermediate frequency amplification module
Output；And in whole process, signal magnitude and transmission in power detection module detection signal transmission path are controlled to controller
Device processed adjusts the gain of low noise amplification module, high frequency amplifying module and intermediate frequency amplification module according to signal magnitude.
More preferably, in the present embodiment, described low noise amplification module includes the low-noise amplifier of two series connection.
The present invention is described by embodiment, but is not limited the invention, with reference to description of the invention, institute
Other changes of disclosed embodiment, are such as readily apparent that, such change should belong to for the professional person of this area
Within the scope of the claims in the present invention limit.
Claims (2)
- A kind of 1. application method of single output optical fibre tuner, it is characterised in that：Described tuner includes opto-electronic conversion mould Block, impedance matching module, low noise amplification module, bandpass filtering modules block, high frequency amplifying module, frequency mixer, oscillator, lock phase Ring, intermediate frequency amplification module, controller and power detection module, described low noise amplification module, high frequency amplifying module and intermediate frequency Amplification module is adjustable gain amplification module；Photoelectric conversion module receives external fiber input signal, photoelectric conversion module Output end is connected with impedance matching module, and the output end of impedance matching module is connected with low noise amplification module, low noise amplification The output end of module is connected with bandpass filtering modules block, and the output end of bandpass filtering modules block is connected with high frequency amplifying module, and high frequency is put The output end of big module is connected with frequency mixer, and the phaselocked loop voltage control output end of controller is connected with phaselocked loop, phaselocked loop Output end is connected with oscillator, and the output end of oscillator is connected with frequency mixer, and output end and the intermediate frequency amplification module of frequency mixer connect Connect, the output end output intermediate-freuqncy signal of intermediate frequency amplification module；Letter in described power detection module detection signal transmission path Number size is simultaneously sent to controller, the gain-adjusted output end of controller respectively with low noise amplification module, high frequency amplifying module Connected with intermediate frequency amplification module；Described method comprises the following steps：TV fiber-optic signal converts optical signals into electric signal by photoelectric switching circuit, by electric signal after impedance matching circuit Be converted to suitable impedance, after through low noise amplification module amplification and bandpass filtering modules block suppress interference after, with being controlled The local oscillation signal as caused by phaselocked loop and oscillator of device control is mixed through frequency mixer, afterwards again after the amplification of intermediate frequency amplification module Output；And in whole process, signal magnitude and transmission in power detection module detection signal transmission path are controlled to controller Device processed adjusts the gain of low noise amplification module, high frequency amplifying module and intermediate frequency amplification module according to signal magnitude.
- A kind of 2. application method of single output optical fibre tuner according to claim 1, it is characterised in that：Described is low Noise amplification module includes the low-noise amplifier of two series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711042530.2A CN107613274A (en) | 2017-10-31 | 2017-10-31 | A kind of application method of single output optical fibre tuner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711042530.2A CN107613274A (en) | 2017-10-31 | 2017-10-31 | A kind of application method of single output optical fibre tuner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107613274A true CN107613274A (en) | 2018-01-19 |
Family
ID=61085174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711042530.2A Withdrawn CN107613274A (en) | 2017-10-31 | 2017-10-31 | A kind of application method of single output optical fibre tuner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107613274A (en) |
-
2017
- 2017-10-31 CN CN201711042530.2A patent/CN107613274A/en not_active Withdrawn
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102983834A (en) | Filter amplifier | |
| CN103490730A (en) | PLL-CS waveband multifunctional frequency down converter with dual-polarized integrated circuit structure | |
| CN107613274A (en) | A kind of application method of single output optical fibre tuner | |
| CN107707961A (en) | A kind of application method of dual output optical fiber tuner | |
| CN107613276A (en) | A kind of single output optical fibre tuner | |
| CN204145508U (en) | Transmission L-band signal receiver | |
| CN107613275A (en) | A kind of dual output optical fiber tuner | |
| CN203661184U (en) | Multi-standard tuner having broadband radio frequency input loop addition output function | |
| KR102182595B1 (en) | Intergrated apparatus of in-building network, signal coverage extender and signal coupling device | |
| CN205408057U (en) | Tuner module can be received by cascaded optic fibre to integration | |
| CN105578158B (en) | A kind of integration can cascade optical fiber reception tuner module | |
| CN204442596U (en) | A kind of radio and television Set Top Box of built-in miniaturized optical receiver | |
| CN202918256U (en) | Filter amplifier | |
| CN210958545U (en) | Ground digital television receiver capable of switching multi-channel audio and video functions by one key | |
| CN103716576A (en) | EOC local-side device | |
| CN205408077U (en) | Tuner module and STB circuit are received to integration optic fibre | |
| CN202694561U (en) | Photovoltaic power station monitoring video and downlink communication coaxial cable transmission device | |
| CN202475432U (en) | Intelligent remote-control optical receiver | |
| CN101674396B (en) | Set top box with function of frequency modulation (FM) radio and operating method thereof | |
| CN203734621U (en) | PLL-CS wave-band multifunctional frequency demultiplier in dual-polarization integrated circuit structure | |
| CN206640719U (en) | Wire digital television signal reception system based on power line transmission | |
| CN202475371U (en) | Two-output voltage-controlled oscillator loop signal distribution amplifier | |
| CN202513881U (en) | Ku-band low-noise frequency-down amplifier | |
| CN205946054U (en) | On -vehicle terrestrial digital TV intelligent gateway | |
| CN203911873U (en) | Dual polarization Twin PLL integrated circuit dual output frequency demultiplier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180119 |