CN2514590Y - Data television signal mixer - Google Patents
Data television signal mixer Download PDFInfo
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- CN2514590Y CN2514590Y CN 01256727 CN01256727U CN2514590Y CN 2514590 Y CN2514590 Y CN 2514590Y CN 01256727 CN01256727 CN 01256727 CN 01256727 U CN01256727 U CN 01256727U CN 2514590 Y CN2514590 Y CN 2514590Y
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- data
- signal
- blender
- modulated
- pass filter
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Abstract
At present, the upgoing noise jamming of HFC network is mainly in the user distributing network. Since a cable modem (CM) has high price and is impossible to be purchased by each family, the machine works unstably. The design provides the family user a mixer which is arranged inside the door, separately connected with a computer and a television, and connected with an outdoor house service cable through a mixed signal input end; and the other end of the cable is connected with a data television signal multi-path mixer which is separately connected on a two-way building amplifier through a TV concentrating distributor, a computer data concentrator HUB and the CM connected with the HUB. The mixer has the characteristic that the utility model comprises a two-way data signal input port, a modulated television signal input port, a data and television mixed signal output port, and components of a transformation circuit which are connected with the ports. The utility model has the outstanding advantages of having simple structure, convenient utilizing, safe and reliable operation, low cost and good application effect of expanding data transmission distance, being convenient for spreading and applying, and the like.
Description
Technical field:
The utility model relates to a kind of signal mixer, also or claim separator, definitely say so and a kind of Computer signal and modulated tv signal are mixed, so that blender with same 75 Ω coaxial cable data signal and TV signal, or at the other end of coaxial cable, the data TV signal separator of mixed signal being separated by it.
Background technology:
By People's Republic of China's broadcast television industry standard, GY/T106-1999 " cable tv broadcast systems technology standard ", the various types of signal wave band is divided: 5-65MHz uplink service, 87-1000MHz are broadcasting, simulated television, Digital Television, data service.Modulated computer downlink information is arranged in 550～750MHz frequency band in 750,000,000 HFC net, and modulated radio and television are arranged in the 87-550MHz frequency band, and uplink information is arranged in the 5-65MHz frequency band.The 5-65MHz data feedback channel that is used for back information, information originate from the cable modem (CM) of user side, end at the main controller (CMTS) of headend room.The optical fibre-coaxial cable net HFC of cable TV is made up of optical fiber, cable trunk and user's distribution network, by HFC front end and customer contact together.In these three parts, go deep into user's distribution network of huge numbers of families, circuit is numerous, shielding properties is poor, the electromagnetic interference that space electric field and home electric produce is scurried into the easiliest from service wire, and converges to front end by the 5-56MHz data feedback channel and be mingled among the useful signal.Can make systemic breakdown during this serious interference.And the chance of optical fiber and cable trunk induction upstream noise is just much smaller.We can say the upstream noise problem that has solved service wire, just solved the greatest problem of both-way communication.
In order to solve the upstream noise problem of service wire, China cable television operator has adopted a kind of " 5 class lines register one's residence mode " in recent years: move on to the public corridor of house being installed to cable modem (CM) in the user family usually, after by hub (HUB) baseband signal being divided into 8 the road or 16 the tunnel, registering one's residence with 5 class lines again and give 8 or 16 computers respectively.This just will move on to the public corridor of house on the 5-65MHz data feedback channel originating point, and avoided the most irreclaimable user's distribution network, even lay the 5 class lines of registering one's residence in addition, but avoided from the radio frequency interference in the user family, increased the reliability of communication, this scheme of the glad employing of operator.10 shared one of users are worth more than 1000 yuan of CM in addition, also reduce by the 5 class lines that newly lay and transmit computer data, and two lines are separate, respectively execute its duty.The cable television operator proposes again: can utilize existing wired TV service wire, not lay 5 class lines, reach again " the 5 class lines mode of registering one's residence: effect.The present invention is to solve the problems of the technologies described above a kind of new design that proposes at this actual demand just.
Summary of the invention:
The utility model is a kind of data, TV signal blender, it is installed in the concentrated distributor box that is positioned at the building unit channel, it concentrates 1 circuit-switched data signal of HUB output and cable TV 1 tunnel TV signal of distributor output to mix, and delivers in the user family with original cable TV service wire.In user family, utilize " data, TV separator " to come out to give respectively computer and television set two kinds of Signal Separation." data, TV separator " is the reverse use of " data, TV blender ", two kinds of functions of a kind of device.A plurality of blenders are combined to form multichannel mixer.
Goal of the invention of the present utility model is: providing a kind of can mix computer data signal with the RF TV signal, make it to transmit at same coaxial cable, and data, the TV signal blender that can two kinds of signals be separated at the other end of this cable.
Goal of the invention of the present utility model realizes by implementing following technical proposals: a kind of HFC of being used for optical fibre-coaxial cable net, cable transmits the data of computer data and modulated tv signal altogether, the TV signal blender, by casing, be contained in the computer data input port on the housing, the input port of modulated tv signal, data TV mixed signal output port, and be loaded on each assembly formation of change-over circuit that is connected with each port on the printed circuit board (PCB) in the casing, it is characterized in that: this change-over circuit is by the transducer that is connected with data-in port, the low pass filter that is connected with this converter output end mouth, the high pass filter that is connected with the modulated tv signal input part, and the high pass filter output data in parallel with the low pass filter output, TV mixed signal output port is formed.
Additional technical feature of the present utility model is: 1. transducer, and by 3 pulse transformer B
1B
2B
3Constituting an end with resistance R is 24 line structure terminations of 2 receipts, the other end is transmission duplex 2 line structure terminations, in order to realizing the transmitting-receiving bridge resistance translation circuit of line construction conversion and impedance conversion, and with these circuit transmission duplex 2 line structure terminations be in series by pulse transformer B
4The two ends balance change-over circuit that constitutes, convert 120 Ω balanced types to 75 Ω uneven formula constitutes.2. receive 24 line structure termination computer data signal input ports that connect, on housing with 2 of transducer, be the RJ45 socket; Be contained in the modulated tv signal input port on the housing, be the FL10 socket; Low pass filter output and the delivery outlet on housing after the high pass filter output is in parallel are the FL10 socket.3. be used for the HFC optical fibre-coaxial cable net data TV signal blender of cable transmission altogether, available single channel blender channeling blender.
Advantage of the present utility model is: have simple in structure, easy to use, with low cost, both utilized the existing cable TV circuit of registering one's residence, a line is dual-purpose, can isolate the upstream noise from service wire again effectively, outstanding advantage such as is suitable for applying.
Description of drawings: Fig. 1 is that the utility model disposes in network and principle of work and power schematic diagram Fig. 2 is the utility model converter structure principle schematic for the utility model single channel mixer structure theory diagram Fig. 3
Embodiment
Data, TV signal No. 8 blenders are mixed and are formed by 8 data, TV signal; The RF input socket FL10 of each unit concentrates the corresponding output end of distributor to be connected with TV; Each unit blender computer data input socket RJ45 is connected with the corresponding output end of computer data hub; Each unit blender output FL10 socket, connect 75 Ω coaxial cable service wires, user side at drop cable links to each other with data, TV separator (oppositely data, the TV signal blender that is connected), and its two data port are connected with television set with computer respectively.The TV that is connected with this No. 8 blender concentrates distributor and computer data hub HUB, the former links to each other with the output of a two-way building amplifier, the latter links to each other with another output of a two-way building amplifier by cable modem CM, (application number: 01247457.6) then the former links to each other with the TV end, and the latter holds link to each other (Fig. 1) with Data when adopting a binary channels building amplifier.The blender that can form other circuit-switched data as required with mixer unit is as No. 16 blenders etc.Data, TV signal blender simple structure, easy to use, it is safe and reliable to be good at; It and concentrated distributor, data hub have been used isolates the service wire upstream noise, utilizes register one's residence circuit, 10 people from vostro account of original cable TV to share CM cost three big advantages, all good market prospects equally.
Claims (4)
1, a kind of HFC optical fibre-coaxial cable net that is used for, cable transmits the data TV signal blender of computer data and modulated tv signal altogether, by casing, be contained in the computer data input port D on the housing, the input port RF of modulated tv signal, data, TV signal output end mouth D/RF, and each assembly of the change-over circuit that is connected with each port that is loaded on the interior printed circuit board (PCB) of housing constitutes, it is characterized in that: this change-over circuit is by the transducer (1) that is connected with data-in port D, the low pass filter (2) that is connected with this transducer (1) output, the high pass filter (3) that is connected with modulated tv signal input part RF, and the low pass filter output data in parallel with the high pass filter output, TV mixed signal output port is formed.
2, according to the described a kind of HFC optical fibre-coaxial cable net that is used for of claim 1, cable transmits the data TV signal blender of computer data and modulated tv signal altogether, it is characterized in that: transducer (1), and by 3 pulse transformer B
1B
2B
3Constituting an end with resistance R is 24 line structure terminations of 2 receipts, the other end is transmission duplex 2 line structure terminations, in order to realizing the transmitting-receiving bridge resistance translation circuit of line construction conversion and impedance conversion, and with these circuit transmission duplex 2 line structure terminations be in series by pulse transformer B
4The two ends balance change-over circuit that constitutes, convert 120 Ω balanced types to 75 Ω uneven formula constitutes.
3, according to the described a kind of HFC optical fibre-coaxial cable net that is used for of claim 2, cable transmits the data TV signal blender of computer data and modulated tv signal altogether, it is characterized in that: receive 24 line structure termination computer data signal input port that connect, on housing D with 2 of transducer, be the RJ45 socket; Be contained in the modulated tv signal input port RF on the housing, be the FL10 socket; Low pass filter output and the delivery outlet D/RF on housing after the high pass filter output is in parallel are the FL10 socket.
4, according to the described a kind of HFC optical fibre-coaxial cable net that is used for of claim 1, the data TV signal blender of cable transmission computer data and modulated tv signal is characterized in that: this blender, available single channel blender channeling blender altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01256727 CN2514590Y (en) | 2001-11-29 | 2001-11-29 | Data television signal mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01256727 CN2514590Y (en) | 2001-11-29 | 2001-11-29 | Data television signal mixer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2514590Y true CN2514590Y (en) | 2002-10-02 |
Family
ID=33665629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01256727 Expired - Fee Related CN2514590Y (en) | 2001-11-29 | 2001-11-29 | Data television signal mixer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2514590Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651771B (en) * | 2008-08-12 | 2012-04-18 | 永硕联合国际股份有限公司 | Electronic device supporting Multimedia over Coax Alliance standards |
| CN102457417A (en) * | 2010-10-27 | 2012-05-16 | 上海澳润通信技术有限公司 | Coaxial network transforming device for 100M Ethernet |
| CN103716576A (en) * | 2014-01-02 | 2014-04-09 | 深圳市双赢伟业科技股份有限公司 | EOC local-side device |
| CN105847732A (en) * | 2016-05-06 | 2016-08-10 | 苏州市职业大学 | Separating and synthesizing device for CATV RF signal and ethernet data signal |
| CN111147095A (en) * | 2019-12-19 | 2020-05-12 | 西安云维智联科技有限公司 | Method, circuit and device for separating radio frequency signal and digital square wave signal |
-
2001
- 2001-11-29 CN CN 01256727 patent/CN2514590Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651771B (en) * | 2008-08-12 | 2012-04-18 | 永硕联合国际股份有限公司 | Electronic device supporting Multimedia over Coax Alliance standards |
| CN102457417A (en) * | 2010-10-27 | 2012-05-16 | 上海澳润通信技术有限公司 | Coaxial network transforming device for 100M Ethernet |
| CN103716576A (en) * | 2014-01-02 | 2014-04-09 | 深圳市双赢伟业科技股份有限公司 | EOC local-side device |
| CN105847732A (en) * | 2016-05-06 | 2016-08-10 | 苏州市职业大学 | Separating and synthesizing device for CATV RF signal and ethernet data signal |
| CN111147095A (en) * | 2019-12-19 | 2020-05-12 | 西安云维智联科技有限公司 | Method, circuit and device for separating radio frequency signal and digital square wave signal |
| CN111147095B (en) * | 2019-12-19 | 2021-10-15 | 西安云维智联科技有限公司 | Method, circuit and device for separating radio frequency signal and digital square wave signal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |