CN104518834A - Inverse noise monitoring device and inverse optical receiver - Google Patents
Inverse noise monitoring device and inverse optical receiver Download PDFInfo
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- CN104518834A CN104518834A CN201310451078.0A CN201310451078A CN104518834A CN 104518834 A CN104518834 A CN 104518834A CN 201310451078 A CN201310451078 A CN 201310451078A CN 104518834 A CN104518834 A CN 104518834A
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- signal
- frequency
- control unit
- inverse
- supervising device
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Abstract
The invention discloses an inverse noise monitoring device. The inverse noise monitoring device comprises a voltage gain amplifier, a frequency mixer, a filter, a radio frequency detector and a micro control unit which are connected in sequence, and a phase locked loop connected with the frequency mixer and the micro control unit, wherein the voltage gain amplifier is used for receiving and amplifying an inverse radio frequency signal; the frequency mixer is used for performing frequency mixing on the amplified inverse radio frequency signal and a signal output by the phase locked loop; the phase locked loop is used for keeping definite relations between the frequency and the phase of a controlled oscillator and an input signal; the filter is used for filtering the frequency-mixed signals; the radio frequency detector is used for converting the filtered radio frequency signal into a voltage signal; and the micro control unit is used for processing the voltage signal obtained by conversion. Through adoption of the inverse noise monitoring device provided by the invention, the aim of intuitively monitoring signal noise can be fulfilled.
Description
Technical field
The present invention relates to communication technical field, particularly relate to signal quality and detect.
Background technology
Backlight receiver is receiving light signal, through opto-electronic conversion, after signal amplifies, by signal transmission to next stage.When client will monitor the quality of this one stage signal, usually can only with specific instrument such as frequency spectrograph, 860 equipment such as grade are measured.
But, because frequency spectrograph build is large, heavy, be inconvenient to carry.And although 860 are convenient for carrying, expensive.
Summary of the invention
The invention provides a kind of inverse noise supervising device and backlight receiver, inverse noise being monitored this function joins in backlight receiver, this function can the noise data of collection signal, then by PC synthetic image, reaches the object of monitor signal noise intuitively.
The invention provides a kind of inverse noise supervising device, it is characterized in that, comprise the voltage control Amplifier, frequency mixer, filter, rf detector and the micro-control unit that are connected successively, and the phase-locked loop be all connected with described micro-control unit with described frequency mixer, wherein:
Described voltage control Amplifier, for receiving and amplifying reverse radio-frequency signal;
Frequency mixer, for the signal mixing reverse radio-frequency signal after described amplification and phase-locked loop exported;
Described phase-locked loop, all keeps determining relation with input signal for making the frequency of controlled oscillator and phase place;
Filter, for carrying out filtering process to the signal after mixing;
Described rf detector, for being converted into voltage signal by the radiofrequency signal after described filtering process;
Described micro-control unit, for processing the voltage signal after described conversion.
Present invention also offers a kind of backlight receiver, there is inverse noise supervising device as above.
Compared with prior art, a kind of inverse noise supervising device provided by the invention and backlight receiver, inverse noise being monitored this function joins in backlight receiver, this function can the noise data of collection signal, then by PC synthetic image, the object of monitor signal noise is intuitively reached.Eliminate and carry out with frequency spectrograph or 860 plug signals the tedious steps tested, client can monitor the noise spectrum of reverse radio-frequency signal at any time intuitively by computer.
Accompanying drawing explanation
Fig. 1 is a kind of inverse noise supervising device of the present invention schematic diagram.
Embodiment
Below in conjunction with specific embodiments and the drawings, the present invention is described in detail.
The invention provides a kind of inverse noise supervising device, comprise voltage control Amplifier (the Voltage GainAmplifier be connected successively, be called for short VGA), frequency mixer, filter, rf detector and micro-control unit (Micro Control Unit, be called for short MCU), and phase-locked loop (the Phase Locked Loop to be all connected with described micro-control unit with described frequency mixer, be called for short PLL), wherein:
Described voltage control Amplifier, for receiving and amplifying reverse radio-frequency signal;
Frequency mixer, for the signal mixing reverse radio-frequency signal after described amplification and phase-locked loop exported;
Described phase-locked loop, for making the frequency of controlled oscillator and phase place all keep determining relation with input signal, thus obtains stable output frequency;
Filter, for carrying out filtering process to the signal after mixing;
Described rf detector, for being converted into voltage signal by the radiofrequency signal after described filtering process;
Described micro-control unit, for processing the voltage signal after described conversion.
Wherein, need the reverse radio-frequency signal of monitoring to be normally coupled out by main road radiofrequency signal, its level 10dB lower than main path signal, therefore, need mixing again after this signal amplifies by VGA.
Wherein, the signal mixing of the stabilized frequency that frequency mixer exports for the PLL reverse radio-frequency signal after amplification and MCU controlled, thus signal is carried out frequency spectrum shift.Such as frequency spectrum shift is to 314MHz.Then by filter, the noise signal of its all band of filtering, only retains the signal of such as 314MHz frequency range.
Preferably, the present invention also designs described inverse noise supervising device and also comprises receiving-transmitting transmitter, for being sent by the voltage signal after described micro-control unit process, and can receive external signal to MCU, realizes MCU with outside mutual.Wherein, described receiving-transmitting transmitter can be universal asynchronous receiving-transmitting transmitter (Universal Asynchronous Receiver/Transmitter is called for short Uart).
Preferably, the present invention also designs described inverse noise supervising device and comprises the display processing unit being provided with process software, for receiving the voltage signal after process, Plotting data being become spectrogram and shows.
Preferably, described micro-control unit is also connected with described voltage control Amplifier, through the gain of synchronous serial Peripheral Interface (Serial Peripheral Interface, SPI) bus marco voltage control Amplifier.
Inverse noise supervising device provided by the invention, is integrated in backlight receiver inner.This device is coupled out part signal from main path signal and processes, and the data after process are generated visual picture by PC, reaches the object of monitoring noise in real time, eliminates the tedious steps with frequency spectrograph and 860 on-the-spot test.
Present invention also offers a kind of backlight receiver, have inverse noise supervising device as above.Thus inverse noise is monitored this function and join in backlight receiver, this function can the noise data of collection signal, then by PC synthetic image, reaches the object of monitor signal noise intuitively.Eliminate and carry out with frequency spectrograph or 860 plug signals the tedious steps tested, client can monitor the noise spectrum of reverse radio-frequency signal at any time intuitively by computer.
Be only several specific embodiment of the present invention above, but the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (7)
1. an inverse noise supervising device, is characterized in that, comprises the voltage control Amplifier, frequency mixer, filter, rf detector and the micro-control unit that are connected successively, and the phase-locked loop be all connected with described micro-control unit with described frequency mixer, wherein:
Described voltage control Amplifier, for receiving and amplifying reverse radio-frequency signal;
Frequency mixer, for the signal mixing reverse radio-frequency signal after described amplification and phase-locked loop exported;
Described phase-locked loop, all keeps determining relation with input signal for making the frequency of controlled oscillator and phase place;
Filter, for carrying out filtering process to the signal after mixing;
Described rf detector, for being converted into voltage signal by the radiofrequency signal after described filtering process;
Described micro-control unit, for processing the voltage signal after described conversion.
2. inverse noise supervising device as claimed in claim 1, is characterized in that, also comprise:
Receiving-transmitting transmitter, for sending the voltage signal after described micro-control unit process.
3. inverse noise supervising device as claimed in claim 2, is characterized in that:
Described receiving-transmitting transmitter is asynchronous receiving-transmitting transmitter.
4. inverse noise supervising device as claimed in claim 2, is characterized in that, also comprise:
Be provided with the display processing unit of process software, for receiving the voltage signal after process, Plotting data become spectrogram and shows.
5. inverse noise supervising device as claimed in claim 1, is characterized in that:
Described micro-control unit is also connected with described voltage control Amplifier, controls the gain of voltage control Amplifier through synchronous serial peripheral interface bus.
6. inverse noise supervising device as claimed in claim 1, is characterized in that:
Described micro-control unit is connected with phase-locked loop through synchronous serial peripheral interface bus.
7. a backlight receiver, has as the inverse noise supervising device in claim 1-6 as described in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310451078.0A CN104518834B (en) | 2013-09-29 | 2013-09-29 | Inverse noise monitoring device and inverse optical receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310451078.0A CN104518834B (en) | 2013-09-29 | 2013-09-29 | Inverse noise monitoring device and inverse optical receiver |
Publications (2)
| Publication Number | Publication Date |
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| CN104518834A true CN104518834A (en) | 2015-04-15 |
| CN104518834B CN104518834B (en) | 2017-05-24 |
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| CN201310451078.0A Active CN104518834B (en) | 2013-09-29 | 2013-09-29 | Inverse noise monitoring device and inverse optical receiver |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101953196A (en) * | 2008-04-07 | 2011-01-19 | 诺基亚公司 | Method, apparatus and computer program for sensing spectrum in a cognitive radio environment |
| US20120176550A1 (en) * | 2011-01-06 | 2012-07-12 | Hendrickson Alan F | Receiver and Method of Receiving Analog and Digital Television Signals |
| CN203661073U (en) * | 2013-09-29 | 2014-06-18 | 北京太平洋莱特科技有限公司 | Reverse noise monitoring apparatus and reverse optical receiver |
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2013
- 2013-09-29 CN CN201310451078.0A patent/CN104518834B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101953196A (en) * | 2008-04-07 | 2011-01-19 | 诺基亚公司 | Method, apparatus and computer program for sensing spectrum in a cognitive radio environment |
| US20120176550A1 (en) * | 2011-01-06 | 2012-07-12 | Hendrickson Alan F | Receiver and Method of Receiving Analog and Digital Television Signals |
| CN203661073U (en) * | 2013-09-29 | 2014-06-18 | 北京太平洋莱特科技有限公司 | Reverse noise monitoring apparatus and reverse optical receiver |
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| CN104518834B (en) | 2017-05-24 |
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