CN106412565A - Testing system and method for wired light tuner - Google Patents
Testing system and method for wired light tuner Download PDFInfo
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- CN106412565A CN106412565A CN201610781047.5A CN201610781047A CN106412565A CN 106412565 A CN106412565 A CN 106412565A CN 201610781047 A CN201610781047 A CN 201610781047A CN 106412565 A CN106412565 A CN 106412565A
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- linear light
- signal
- measurement
- tuner
- optical
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
The invention discloses a testing system and method for a wired light tuner. The testing system comprises a testing signal transmitter, a photoelectric converter, an optical attenuator, a wired light tuner receiver and a monitor; a testing electric signal output end of the testing signal transmitter is connected with a testing optical signal input end of the wired light tuner receiver sequentially through the photoelectric converter and the optical attenuator; and an output end of the wired light tuner receiver is connected with the monitor. Various indexes of the wired light tuner can be tested and are shown by mosaics of an image so as to facilitate a user observing; the method is reliable; testing accuracy is high; and the testing system and method are convenient to implement and have wide application prospect.
Description
Technical field
The present invention relates to cable digital TV technical field is and in particular to a kind of test system for there being linear light tuner
And method.
Background technology
There is linear light tuner（Demodulator）, it plays from converting optical signals to telecommunications in Cable Digital TV Network transmission
Number, and converting electrical signal to intermediate-freuqncy signal, so that demodulator decoding below, generate digital TS stream, be cable digital TV
The critical component of network transmission, therefore, in order to ensure there is linear light tuner（Demodulator）Performance, to there being linear light tuner（Demodulation
Device）The test of every network parameter when, very necessary.Traditional has linear light tuner receiver, is provided with every networking and refers to
Target test request, but, with due to increased photoelectric conversion module before having linear light tuner, lead to there is linear light tuner
Receiver, in general can only simple test receive light signal strength scope, other indexs, such as operating frequency model
Enclose, channel bandwidth, I, Q amplitude imbalance demodulation ability, I, Q phase contrast demodulation ability, anti-impulse disturbances ability, anti-with frequency single-frequency
The parameters such as interference suppression ratio, adjacent channel rejection ratio all can not be tested, and impact is to the performance evaluation having linear light tuner.
Content of the invention
The purpose of the present invention is to overcome existing to have linear light tuner receiver cannot have to increased photoelectric conversion module
Linear light tuner carries out the problem of many index test.Being used for of the present invention has linear light tuner（Demodulator）Test system and side
Method, by the test signal transmitter that is connected, optical-electrical converter, optical attenuator, has linear light tuner receiver and monitor,
The indices of linear light tuner can be tested, and shown by the mosaic of image, be easy to user and observe, method can
Lean on, measuring accuracy is high, facilitates implementation, has a good application prospect.
In order to achieve the above object, the technical solution adopted in the present invention is：
A kind of test system for there being linear light tuner it is characterised in that：Including test signal transmitter, optical-electrical converter, light
Attenuator, there are linear light tuner receiver and monitor,
Described test signal transmitter, for adjusting the output of the signal of telecommunication, generates the measurement signal of telecommunication having needed for linear light tuner；
Described optical-electrical converter, for test signal transmitter is exported the measurement signal of telecommunication, be converted to measurement optical signal；
Described optical attenuator, has the light intensity range of receiving of linear light tuner receiver for test and adjusts measurement optical signal
Light intensity, makes the light intensity of measurement optical signal fall in the input range near center location having linear light tuner receiver；
Described have linear light tuner receiver, for receiving measurement optical signal, and measures corresponding parameter value, parameter value is sent out
Give monitor；
Described monitor, the parameter value of the indices for receiving, shown by the mosaic of image, be easy to see
Examine；
The test electrical signal of described test signal transmitter passes sequentially through optical-electrical converter, optical attenuator and has linear light
The measurement optical signal input of tuner receiver is connected, and the described outfan having linear light tuner receiver is connected with monitor
Connect.
A kind of aforesaid test system for there being linear light tuner it is characterised in that：Described have needed for linear light tuner
The measurement signal of telecommunication includes the light intensity of linear light tuner, operating frequency range, channel bandwidth, demodulation mode, C/N thresholding, frequency
Catching range, support range of symbol rates, anti-micro- reflection E/D ability, I, Q amplitude imbalance demodulation ability, I, Q phase contrast demodulates
Ability, anti-impulse disturbances ability, anti-with frequency mono-tone interference rejection ratio, adjacent channel rejection ratio.
A kind of aforesaid test system for there being linear light tuner it is characterised in that：The operating wave of described optical-electrical converter
Length is consistent with the input wavelength having linear light tuner.
Method of testing based on the above-mentioned test system for there being linear light tuner it is characterised in that：Walk including following
Suddenly,
Step（1）, according to there being the measurement index required for linear light tuner, adjust test signal transmitter, generate corresponding measurement
The signal of telecommunication；
Step（2）, adjust the output level of test signal transmitter, so that the range value of the measurement signal of telecommunication is controlled in optical-electrical converter
In the set point at incoming level center, the measurement signal of telecommunication after adjusting is sent to optical-electrical converter；
Step（3）, the measurement signal of telecommunication is received by optical-electrical converter, and the measurement signal of telecommunication is converted to measurement optical signal；
Step（4）, measurement optical signal is connect by optical attenuator, and tests the light intensity range of receiving of linear light tuner receiver；
Step（5）, adjust the light intensity of the measurement optical signal receiving by optical attenuator, so that the light intensity of measurement optical signal is fallen
Have in the set point at linear light tuner receiver incoming level center, the measurement optical signal after adjusting has been sent to linear light
Tuner receiver；
Step（6）, there is linear light tuner receiver to receive measurement optical signal, and the corresponding parameter value of this measurement index, by parameter value
It is sent to monitor；
Step（7）, described monitor by receive parameter value, shown by the mosaic of image, be easy to user observe.
The invention has the beneficial effects as follows：The test system for there being linear light tuner of the present invention and method, by being connected
Test signal transmitter, optical-electrical converter, optical attenuator, have linear light tuner receiver and monitor, linear light can have been tested
The indices of tuner, and shown by the mosaic of image, it is easy to user and observes, method is reliable, measuring accuracy is high,
Facilitate implementation, have a good application prospect.
Brief description
Fig. 1 is the system block diagram of the test system for there being linear light tuner of the present invention.
Specific embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
As shown in figure 1, the test system for there being linear light tuner of the present invention, turn including test signal transmitter, photoelectricity
Parallel operation, optical attenuator, there are linear light tuner receiver and monitor,
Described test signal transmitter, for adjusting the output of the signal of telecommunication, generates the measurement signal of telecommunication having needed for linear light tuner,
Have and include the light intensity of linear light tuner, operating frequency range, channel bandwidth, demodulation mode, C/N thresholding, frequency acquisition model
Enclose, support range of symbol rates, anti-micro- reflection E/D ability, I that Q amplitude imbalance demodulation ability, I, resist Q phase contrast demodulation ability
Impulse disturbances ability, anti-with frequency mono-tone interference rejection ratio, adjacent channel rejection ratio, by the above-mentioned test index of test signal transmitter
The measurement signal of telecommunication be prior art, and follow GY/T 241-2009 standard；
Described optical-electrical converter, for test signal transmitter is exported the measurement signal of telecommunication, be converted to measurement optical signal；
Described optical attenuator, has the light intensity range of receiving of linear light tuner receiver for test and adjusts measurement optical signal
Light intensity, makes the light intensity of measurement optical signal fall in the input range near center location having linear light tuner receiver；
Described have linear light tuner receiver, for receiving measurement optical signal, and measures corresponding parameter value, parameter value is sent out
Give monitor；
Described monitor, the parameter value of the indices for receiving, shown by the mosaic of image, be easy to see
Examine；
The test electrical signal of described test signal transmitter passes sequentially through optical-electrical converter, optical attenuator and has linear light
The measurement optical signal input of tuner receiver is connected, and the described outfan having linear light tuner receiver is connected with monitor
Connect.
The operation wavelength of described optical-electrical converter is consistent with the input wavelength having linear light tuner.
Based on the method for testing of the above-mentioned test system for there being linear light tuner, comprise the following steps,
Step（1）, according to there being the measurement index required for linear light tuner, adjust test signal transmitter, generate corresponding measurement
The signal of telecommunication；
Step（2）, adjust the output level of test signal transmitter, so that the range value of the measurement signal of telecommunication is controlled in optical-electrical converter
In the set point at incoming level center（Depending on set point is according to there being linear light tuner specifications）, will adjust after measurement electricity
Signal is sent to optical-electrical converter；
Step（3）, the measurement signal of telecommunication is received by optical-electrical converter, and the measurement signal of telecommunication is converted to measurement optical signal；
Step（4）, measurement optical signal is connect by optical attenuator, and tests the light intensity range of receiving of linear light tuner receiver；
Step（5）, adjust the light intensity of the measurement optical signal receiving by optical attenuator, so that the light intensity of measurement optical signal is fallen
Have in the set point at linear light tuner receiver incoming level center（Depending on set point is according to there being linear light tuner specifications）,
Measurement optical signal after adjusting has been sent to linear light tuner receiver；
Step（6）, there is linear light tuner receiver to receive measurement optical signal, and the corresponding parameter value of this measurement index, calculating process
For prior art, and follow GY/T 241-2009 standard, parameter value is sent to monitor；
Step（7）, described monitor by receive parameter value, shown by the mosaic of image, be easy to user observe.
In sum, the test system for there being linear light tuner of the present invention and method, by the test signal being connected
Transmitter, optical-electrical converter, optical attenuator, there are linear light tuner receiver and monitor, each of linear light tuner can be tested
Item index, and shown by the mosaic of image, it is easy to user and observes, method is reliable, measuring accuracy is high, facilitates implementation,
Have a good application prospect.
Ultimate principle, principal character and the advantage of the present invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not restricted to the described embodiments, the simply explanation present invention's described in above-described embodiment and description is former
Reason, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changes and improvements
Both fall within scope of the claimed invention.Claimed scope is by appending claims and its equivalent circle.
Fixed.
Claims (4)
1. a kind of test system for there being linear light tuner it is characterised in that：Including test signal transmitter, optical-electrical converter,
Optical attenuator, there are linear light tuner receiver and monitor,
Described test signal transmitter, for adjusting the output of the signal of telecommunication, generates the measurement signal of telecommunication having needed for linear light tuner；
Described optical-electrical converter, for test signal transmitter is exported the measurement signal of telecommunication, be converted to measurement optical signal；
Described optical attenuator, has the light intensity range of receiving of linear light tuner receiver for test and adjusts measurement optical signal
Light intensity, makes the light intensity of measurement optical signal fall in the input range near center location having linear light tuner receiver；
Described have linear light tuner receiver, for receiving measurement optical signal, and measures corresponding parameter value, parameter value is sent out
Give monitor；
Described monitor, the parameter value of the indices for receiving, shown by the mosaic of image, be easy to see
Examine；
The test electrical signal of described test signal transmitter passes sequentially through optical-electrical converter, optical attenuator and has linear light
The measurement optical signal input of tuner receiver is connected, and the described outfan having linear light tuner receiver is connected with monitor
Connect.
2. a kind of test system for there being linear light tuner according to claim 1 it is characterised in that：Described have linear light
The measurement signal of telecommunication needed for tuner include the light intensity of linear light tuner, operating frequency range, channel bandwidth, demodulation mode,
C/N thresholding, frequency acquisition scope, support range of symbol rates, anti-micro- reflection E/D ability, I, Q amplitude imbalance demodulation ability, I,
Q phase contrast demodulation ability, anti-impulse disturbances ability, anti-with frequency mono-tone interference rejection ratio, adjacent channel rejection ratio.
3. a kind of test system for there being linear light tuner according to claim 1 it is characterised in that：Described photoelectricity turns
The operation wavelength of parallel operation is consistent with the input wavelength having linear light tuner.
4. the method for testing based on a kind of test system for there being linear light tuner described in claim 1 it is characterised in that：
Comprise the following steps,
Step（1）, according to there being the measurement index required for linear light tuner, adjust test signal transmitter, generate corresponding measurement
The signal of telecommunication；
Step（2）, adjust the output level of test signal transmitter, so that the range value of the measurement signal of telecommunication is controlled in optical-electrical converter
In the set point at incoming level center；The measurement signal of telecommunication after adjusting is sent to optical-electrical converter；
Step（3）, the measurement signal of telecommunication is received by optical-electrical converter, and the measurement signal of telecommunication is converted to measurement optical signal；
Step（4）, measurement optical signal is connect by optical attenuator, and tests the light intensity range of receiving of linear light tuner receiver；
Step（5）, adjust the light intensity of the measurement optical signal receiving by optical attenuator, so that the light intensity of measurement optical signal is fallen
Have in the set point at linear light tuner receiver incoming level center, the measurement optical signal after adjusting has been sent to linear light
Tuner receiver；
Step（6）, there is linear light tuner receiver to receive measurement optical signal, and the corresponding parameter value of this measurement index, by parameter value
It is sent to monitor；
Step（7）, described monitor by receive parameter value, shown by the mosaic of image, be easy to user observe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610781047.5A CN106412565A (en) | 2016-08-31 | 2016-08-31 | Testing system and method for wired light tuner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610781047.5A CN106412565A (en) | 2016-08-31 | 2016-08-31 | Testing system and method for wired light tuner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106412565A true CN106412565A (en) | 2017-02-15 |
Family
ID=58001735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610781047.5A Pending CN106412565A (en) | 2016-08-31 | 2016-08-31 | Testing system and method for wired light tuner |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030098911A1 (en) * | 2001-11-27 | 2003-05-29 | Pioneer Corporation | Video display apparatus |
| CN201298903Y (en) * | 2008-09-25 | 2009-08-26 | 浙江省广电科技股份有限公司 | Device for remote real-time monitoring of digital television signals |
| CN102244806A (en) * | 2011-06-27 | 2011-11-16 | 广州视源电子科技有限公司 | Method and system for automatically testing reception performance parameters of digital television |
| CN202918438U (en) * | 2012-09-07 | 2013-05-01 | 北京歌华有线电视网络股份有限公司 | Signal generator for optical and electrical application |
| CN105356940A (en) * | 2015-12-01 | 2016-02-24 | 上海斐讯数据通信技术有限公司 | CATV product test system and method |
-
2016
- 2016-08-31 CN CN201610781047.5A patent/CN106412565A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030098911A1 (en) * | 2001-11-27 | 2003-05-29 | Pioneer Corporation | Video display apparatus |
| CN201298903Y (en) * | 2008-09-25 | 2009-08-26 | 浙江省广电科技股份有限公司 | Device for remote real-time monitoring of digital television signals |
| CN102244806A (en) * | 2011-06-27 | 2011-11-16 | 广州视源电子科技有限公司 | Method and system for automatically testing reception performance parameters of digital television |
| CN202918438U (en) * | 2012-09-07 | 2013-05-01 | 北京歌华有线电视网络股份有限公司 | Signal generator for optical and electrical application |
| CN105356940A (en) * | 2015-12-01 | 2016-02-24 | 上海斐讯数据通信技术有限公司 | CATV product test system and method |
Non-Patent Citations (1)
| Title |
|---|
| 国家广播电影电视总局: "《中华人民共和国广播电影电视行业标准GY/T 241-2009》", 4 November 2009 * |
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Application publication date: 20170215 |
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