CN103716576A - EOC local-side device - Google Patents
EOC local-side device Download PDFInfo
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- CN103716576A CN103716576A CN201410003210.6A CN201410003210A CN103716576A CN 103716576 A CN103716576 A CN 103716576A CN 201410003210 A CN201410003210 A CN 201410003210A CN 103716576 A CN103716576 A CN 103716576A
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Abstract
The invention provides an EOC local-side device which comprises an adjustable attenuation module, a field intensity detection module, a network interface module, an EOC communication module, a master control module and a frequency mixing module. The master control module is connected with the network interface module, the EOC communication module, the field intensity detection module and the adjustable attenuation module respectively. The adjustable attenuation module is connected with the field intensity detection module and the frequency mixing module respectively. The frequency mixing module is further connected with the EOC communication module. The field intensity detection module is used for detecting the intensity of a cable digital television signal and sending a detection result to the master control module. The master control module is used for giving an instruction to the adjustable attenuation module so that the intensity of the cable digital television signal can be adjusted. The EOC local-side device can be used for detecting and adjusting the intensity of the input cable television signal.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of EOC local side apparatus.
Background technology
EOC(Ethernet over Coax, in coaxial cable, carry out the transmission of Ethernet data signal) be one of technology the most popular in Two-way Network transformation instantly, main flow is carried out ethernet signal transfer of data exactly after ovennodulation in coaxial cable, its frequency does not take cable TV frequency band, and cable TV frequency coexistence.It becomes the favorite in bidirectional network reconstruction technology for making with simple, stable, safety, low cost and other advantages.EOC local side apparatus is the equipment that ethernet signal and CATV cable TV signal are mixed, and after mixing, mixed signal is sent to EOC terminal equipment, and EOC terminal equipment is responsible for extracting ethernet signal and cable TV signal, for user, uses.
As shown in Figure 1, the EOC local side apparatus of prior art comprises Network Interface Module, main control module, EOC communication module and frequency mixing module.Network Interface Module is used to EOC local side apparatus that network interface is provided.Main control module is used for providing network uplink and descending access for EOC communication module, and it is connected with EOC module, to realize the control to network of relation signal.EOC communication module is for realizing the conversion between network signal and coaxial transmission signal.Frequency mixing module is for carrying out mixing by TV signal and eoc signal.
In bilateral network transformation, TV signal amplitude to user side need to guarantee that 60DBuV is between 80DBuV, the TV signal of general EOC local side is all a fixing level output, then in each terminal node, controls decay, guarantees that the Zhongdao user's of each family is the level of an effective range.Far and near according to distance when concrete engineering sets up, adjust the decay of TV signal, also can control fixing decay at local side.And outdoor EOC local side apparatus is to be generally erected on electric pole, or in telecommunications case, need to climb on electric pole, take machine apart, additional field intensity meter test decay, the decay inserted sheet that then needs reinforcement fixed for the decay that obtains needing, adjusts very inconvenient.
Summary of the invention
In order to solve the problems referred to above of prior art, being necessary to provide a kind of can carry out self-adjusting EOC local side apparatus to the intensity of cable TV signal.
The technical scheme that technical solution problem of the present invention provides is:
A kind of EOC local side apparatus, it comprises adjustable damping module, field intensity detection module, Network Interface Module, EOC communication module, main control module and frequency mixing module, described main control module respectively with described Network Interface Module, EOC communication module, field intensity detection module is connected with adjustable damping module, described adjustable damping module is connected with described frequency mixing module with described field intensity detection module respectively, described frequency mixing module is further connected with described EOC communication module, described field intensity detection module is for detection of the intensity of digital catv signal, and the result of detection is sent to described main control module, described main control module is used for sending instruction to described adjustable damping module, with the intensity to digital catv signal, regulate.
Wherein, described field intensity detection module comprises one-level phase-locked loop, secondary phase-locked loop, crystal oscillator, the first filter, one-level mixing unit, secondary mixing unit, three grades of mixing unit, detection amplifying unit, the second filter and A/D converter, the first filter, one-level mixing unit, secondary mixing unit, three grades of mixing unit, detection amplifying unit, the second filter is connected successively with A/D converter, one-level phase-locked loop is connected with secondary mixing unit with one-level mixing unit respectively with secondary phase-locked loop, one-level phase-locked loop is further connected with secondary phase-locked loop.
Wherein, described Network Interface Module provides EPON interface and Ethernet interface.
Wherein, described frequency mixing module comprises a high pass filter and a low pass filter.
Compared with prior art, EOC local side apparatus of the present invention has added field intensity detection module and controllable attenuation module, the power of energy Real-Time Monitoring cable TV signal, and can and control cable TV signal output level by Ethernet remote monitoring, then according to testing result, adjust the power of cable TV signal.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the EOC local side apparatus of prior art.
Fig. 2 is the schematic diagram of the EOC local side apparatus of one embodiment of the invention.
Fig. 3 is the schematic diagram of the field intensity detection module in Fig. 1.
Fig. 4 is the schematic diagram of the frequency mixing module in Fig. 1.
Embodiment
As shown in Figure 2, the EOC local side apparatus of one embodiment of the invention comprises adjustable damping module, field intensity detection module, Network Interface Module, EOC communication module, main control module and frequency mixing module.Main control module is connected with Network Interface Module, EOC communication module, field intensity detection module and adjustable damping module respectively.Adjustable damping module is connected with frequency mixing module with field intensity detection module respectively.Frequency mixing module is further connected with EOC communication module.
Adjustable damping module is connected with outside TV signal source, and it,, for regulating the come on TV decay of signal of tv link, is controlled according to signal amplitude by main control module.
Field intensity detection module is monitored TV signal intensity, gives governor circuit result feedback simultaneously, and accepts governor circuit detection and control.As shown in Figure 3, field intensity detection module comprises one-level phase-locked loop, secondary phase-locked loop, crystal oscillator, the first filter, one-level mixing unit, secondary mixing unit, three grades of mixing unit, detection amplifying unit, the second filter and A/D converters.The first filter, one-level mixing unit, secondary mixing unit, three grades of mixing unit, detection amplifying unit, second filters are connected successively with A/D converter.One-level phase-locked loop is connected with secondary mixing unit with one-level mixing unit respectively with secondary phase-locked loop.One-level phase-locked loop is further connected with secondary phase-locked loop.Field intensity detection module carries out tuning, frequency conversion, amplification and detection to cable TV signal, finally the DC level signal obtaining is converted to digital signal by A/D converter and sends into main control module, realizes the monitoring to TV signal amplitude.
Network Interface Module provides EPON interface and Ethernet interface.Main control module is used to EOC communication module that upstream Interface and downstream interface are provided, and it realizes the control to network signal together with EOC communication module.The cable TV signal intensity that main control module also detects according to field intensity detection module, sends control signal to adjustable damping network, thereby regulates the intensity of the cable TV signal that enters frequency mixing module.EOC communication module is for realizing the conversion between network signal and coaxial transmission signal.
Frequency mixing module provides the mixing output of CATV TV signal and ethernet signal.As shown in Figure 4, frequency mixing module comprises a high pass filter and a low pass filter.Cable TV signal belongs to high band, by high frequency filter, first carries out filtering.Be modulated to coaxial ethernet signal and carry out filtering through low-frequency filter.Cable TV signal is after filtering sent into subscriber household with being modulated to after coaxial ethernet signal mixes.
Compared with prior art, EOC local side apparatus of the present invention has added field intensity detection module and controllable attenuation module, the power of energy Real-Time Monitoring cable TV signal, and can and control cable TV signal output level by Ethernet remote monitoring, then according to testing result, adjust the power of cable TV signal.。
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (4)
1. an EOC local side apparatus, it is characterized in that, comprise adjustable damping module, field intensity detection module, Network Interface Module, EOC communication module, main control module and frequency mixing module, described main control module respectively with described Network Interface Module, EOC communication module, field intensity detection module is connected with adjustable damping module, described adjustable damping module is connected with described frequency mixing module with described field intensity detection module respectively, described frequency mixing module is further connected with described EOC communication module, described field intensity detection module is for detection of the intensity of digital catv signal, and the result of detection is sent to described main control module, described main control module is used for sending instruction to described adjustable damping module, with the intensity to digital catv signal, regulate.
2. EOC local side apparatus according to claim 1, it is characterized in that, described field intensity detection module comprises one-level phase-locked loop, secondary phase-locked loop, crystal oscillator, the first filter, one-level mixing unit, secondary mixing unit, three grades of mixing unit, detection amplifying unit, the second filter and A/D converter, the first filter, one-level mixing unit, secondary mixing unit, three grades of mixing unit, detection amplifying unit, the second filter is connected successively with A/D converter, one-level phase-locked loop is connected with secondary mixing unit with one-level mixing unit respectively with secondary phase-locked loop, one-level phase-locked loop is further connected with secondary phase-locked loop.
3. EOC local side apparatus according to claim 1, is characterized in that, described Network Interface Module provides EPON interface and Ethernet interface.
4. EOC local side apparatus according to claim 1, is characterized in that, described frequency mixing module comprises a high pass filter and a low pass filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410003210.6A CN103716576A (en) | 2014-01-02 | 2014-01-02 | EOC local-side device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410003210.6A CN103716576A (en) | 2014-01-02 | 2014-01-02 | EOC local-side device |
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| CN103716576A true CN103716576A (en) | 2014-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410003210.6A Pending CN103716576A (en) | 2014-01-02 | 2014-01-02 | EOC local-side device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104468129A (en) * | 2014-10-30 | 2015-03-25 | 成都康特电子高新科技有限责任公司 | EOC local side based on broadcast television network system |
| CN105611423A (en) * | 2015-12-28 | 2016-05-25 | 苏州云普通讯技术有限公司 | System for realizing co-cable transmission of data signal and television signal to desktop based on EPON |
| CN106713008A (en) * | 2016-11-18 | 2017-05-24 | 武汉烽火网络有限责任公司 | EOC local equipment performance test method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2514590Y (en) * | 2001-11-29 | 2002-10-02 | 向祖璧 | Data television signal mixer |
| CN101277420A (en) * | 2007-03-27 | 2008-10-01 | 真宽通信技术（苏州）有限公司 | Bidirectional access equipment for CATV network |
| US20100138880A1 (en) * | 2008-12-02 | 2010-06-03 | At&T Intellectual Property I, L.P. | Ethernet over coaxial coupling system, method and apparatus |
| CN102395021A (en) * | 2011-10-26 | 2012-03-28 | 常熟市高事达光电科技有限公司 | CATV (Cable Television) amplifier capable of being upgraded to EOC (Ethernet Over Coax) local-side optical receiver circuit |
-
2014
- 2014-01-02 CN CN201410003210.6A patent/CN103716576A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2514590Y (en) * | 2001-11-29 | 2002-10-02 | 向祖璧 | Data television signal mixer |
| CN101277420A (en) * | 2007-03-27 | 2008-10-01 | 真宽通信技术（苏州）有限公司 | Bidirectional access equipment for CATV network |
| US20100138880A1 (en) * | 2008-12-02 | 2010-06-03 | At&T Intellectual Property I, L.P. | Ethernet over coaxial coupling system, method and apparatus |
| CN102395021A (en) * | 2011-10-26 | 2012-03-28 | 常熟市高事达光电科技有限公司 | CATV (Cable Television) amplifier capable of being upgraded to EOC (Ethernet Over Coax) local-side optical receiver circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104468129A (en) * | 2014-10-30 | 2015-03-25 | 成都康特电子高新科技有限责任公司 | EOC local side based on broadcast television network system |
| CN105611423A (en) * | 2015-12-28 | 2016-05-25 | 苏州云普通讯技术有限公司 | System for realizing co-cable transmission of data signal and television signal to desktop based on EPON |
| CN106713008A (en) * | 2016-11-18 | 2017-05-24 | 武汉烽火网络有限责任公司 | EOC local equipment performance test method |
| CN106713008B (en) * | 2016-11-18 | 2019-08-13 | 烽火通信科技股份有限公司 | The method that a kind of pair of EOC local-side device is tested for the property |
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Application publication date: 20140409 |