CN206164712U - Indoor type single mode multiport EOC head end - Google Patents
Indoor type single mode multiport EOC head end Download PDFInfo
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- CN206164712U CN206164712U CN201621005780.XU CN201621005780U CN206164712U CN 206164712 U CN206164712 U CN 206164712U CN 201621005780 U CN201621005780 U CN 201621005780U CN 206164712 U CN206164712 U CN 206164712U
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Abstract
The utility model discloses an indoor type unimodule multiport EOC head end, it includes DC socket, power core piece, switch, EOC head end owner chip, RF chips, two distributors, diplexer filter and decay regulator, the input of decay regulator inserts cable television signal, the output of decay regulator with the first input end of EOC head end owner chip link to each other, the input of switch inserts the internet signal, the output of switch with the second input of EOC head end owner chip link to each other, the output of EOC head end owner chip links to each other with RF chips's input, RF chips's output and two distributor inputs link to each other, the output of two distributors links to each other with a plurality of diplexer filter, the utility model discloses an antisurge design, can be effectual protect the surge, simultaneously the utility model discloses an electromagnetic compatibility can be good, is showing and improving the jam -proof performance, improved the transmission effect, has reduced the safe occurrence probability of accident who has the electromagnetic compatibility problem to arouse.
Description
Technical field
The utility model is related to EOC apparatus fields, more particularly to a kind of indoor type single module multiport EOC head ends.
Background technology
As SARFT(The State Administration of Radio and Television) is to digital improvement and the requirement of unification of three nets, current whole nation cable industry is
Carry out overall digital transformation.It is revolutionary to there is will the business of whole cable television, operation mode in cable TV digitalization
Change, there is data of the one-way video business to two-way interactive, a development regarding, audio frequency integrated service, and new business and new operation mould
Formula proposes new requirement to network, and the embodiment most concentrated is exactly to require that real-time performance is two-way.From in development trend, by ether matchmaker
Body access control layer data protocol works in the development model that various physical layer networks are access networks from now on.
EOC is that, using the access technology of Ethernet protocol, general principle is based on wired TV coaxial cable net：Utilize
Cable TV signal is transmitted in 100MHz frequencies above, the characteristic that base-band data signal is transmitted in 80MHz frequencies below, EOC
Head end（EOC head ends）It is multiplexed into both coaxial to wear so as to eliminating 5 class lines and registering one's residence to be transmitted using coaxial cable above
The unnecessary trouble that wall punching brings for user.EOC headends are generally placed upon corridor, or cell.So as to TV signal with
Data-signal delivers to user using cable TV network, and EOC terminal separates TV signal with data-signal.
It is the potential threat of daily electrical equipment service life in electromagnetic compatibility and surge.
Electromagnetic wave is the major way that electromagnetic energy is propagated, when high-frequency circuit works, the outside radiated electromagnetic wave of meeting, and various fortune
It is associated with each other with electromagnetic conductive, electromagnetic induction and three kinds of modes of electromagnetic radiation and influence each other between capable power equipment, one
The equipment of operation and personnel can be interfered, affected and endangered under conditions of fixed.Interference is produced to neighbouring miscellaneous equipment.Separately
On the one hand, the various electromagnetic waves in space also can be sensed in circuit, and circuit is interfered, and cause isolation performance not high, used
The misoperation for causing equipment can be disturbed during equipment because of signal, in some instances it may even be possible to cause serious security incident, so-called electromagnetic compatibility
It is exactly system or equipment energy normal work in residing electromagnetic environment, while will not interfere to other systems and equipment.
Surge is also surging, as the term suggests just it is above the transient overvoltage of normal working voltage.Essentially, surge is
There is a kind of violent pulse within only hundreds of time a ten thousandth second.The reason for surge may be caused has：It is jumbo, short
Road, power supply switching or big-block engine.And the product containing surge insulation device can effectively absorb the huge energy of burst,
To protect connection equipment to avoid being damaged
Because EOC head ends are used as communication equipment, cost is higher, it is desirable to pot life it is relatively long, it is therefore necessary to
Need to consider installation electromagnetical compatibility performance and antisurge performance when being designed EOC head ends.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided a kind of indoor type single module multiport EOC
Head end.
The purpose of this utility model is achieved through the following technical solutions：A kind of indoor type single module multiport EOC
Head end, it includes DC socket, power supply chip, switch, EOC head end master chips, radio frequency chip, two distributors, duplexer filter
With Attenuation adjustable device；
The input incoming cable television signal of described Attenuation adjustable device, the output end of described Attenuation adjustable device and institute
The first input end of the EOC head end master chips stated is connected；The input of described switch accesses internet signal, described friendship
The output end changed planes is connected with the second input of described EOC head end master chips, the output end of described EOC head end master chips
It is connected with the input of radio frequency chip, the output end of described radio frequency chip is connected with two distributor inputs, described two points
The output end of orchestration is connected with multiple duplexer filters；
DC socket is provided with described power supply chip；
Antisurge module and electromagnetic compatibility filtration module are integrated with described power supply chip；
Reset key is integrated with described EOC head end master chips.
Described antisurge module includes：First electric capacity C1, the first inductance L1, Transient Suppression Diode TVS, the one or two pole
Pipe D1, the second diode D2, the 3rd diode D3, input Input and output end Output, the sun of the first diode D1
The negative electrode of pole and the second diode D2 is connected and while be connected with one end of inductance, the anode and the 3rd of the second diode D2
The anode of diode D3 is grounded simultaneously, and the described negative electrode of the first diode D1 and the negative electrode of the 3rd diode D3 is both connected to electricity
On the VDD of source, described Transient Suppression Diode TVS one end is connected respectively with the first inductance L1 with output end Output, transient state suppression
The other end ground connection of diode TVS processed, described first electric capacity C1 one end respectively with input Input and the first inductance L1 phases
Even, first electric capacity C1 other ends ground connection.
Described electromagnetic compatibility filtration module includes input and output end, the input include live wire input L and
Zero line input N, output end include fire wire output end L ' and zero line output end N ', live wire input L and fire wire output end L ' it
Between be connected in series with the second inductance L2, the 3rd inductance L3 is connected in series between zero line input N and zero line output end N ', fire
Line input L and zero line input N is connected with the second electric capacity C2, and live wire input L is near one end of the second inductance L2 and zero line
Input N is connected with first resistor R1, the other end and the 3rd inductance of the second inductance L2 between one end of the 3rd inductance L3
The 3rd electric capacity C3, fire wire output end L are connected between the other end of L3 ' it is connected in series with the 3rd electric capacity C3 with zero line output end N '
With the 4th electric capacity C4, the tie point ground connection between the 3rd electric capacity C3 and the 4th electric capacity C4.
The input Input of described antisurge module is connected with DC socket, described output end Output with it is described
The live wire input L of electromagnetic compatibility filtration module is connected, fire wire output end L of described electromagnetic compatibility filtration module ' and power supply
Chip is connected.
The beneficial effects of the utility model are：The utility model employs antisurge and is designed with buffer circuit to impact electricity
Stream enters the partial action that row buffering, inductance offset dash current, and effectively surge can be protected.Anti- wave of the present utility model
Gush modular structure simple, contribute to realizing the miniaturization of equipment, the needs of existing sub-headend device miniaturization are met, while this reality
It is good with new Electro Magnetic Compatibility, anti-tampering performance is significantly improved, laser propagation effect is improve, reduce electromagnetic compatibility and asked
The security incident probability of happening that topic causes.
Description of the drawings
Fig. 1 is the utility model block diagram；
Fig. 2 is the utility model antisurge Modular circuit design figure；
Fig. 3 is the utility model electromagnetic compatibility filtration module circuit design drawing.
Specific embodiment
The technical solution of the utility model is described in further detail below in conjunction with the accompanying drawings：As shown in figure 1, a kind of indoor type list
Module multiport EOC head ends, it includes DC socket, power supply chip, switch, EOC head end master chips, radio frequency chip, two distribution
Device, duplexer filter and Attenuation adjustable device；
The input incoming cable television signal of described Attenuation adjustable device, the output end of described Attenuation adjustable device and institute
The first input end of the EOC head end master chips stated is connected；The input of described switch accesses internet signal, described friendship
The output end changed planes is connected with the second input of described EOC head end master chips, the output end of described EOC head end master chips
It is connected with the input of radio frequency chip, the output end of described radio frequency chip is connected with two distributor inputs, described two points
The output end of orchestration is connected with multiple duplexer filters；
DC socket is provided with described power supply chip；
Antisurge module and electromagnetic compatibility filtration module are integrated with described power supply chip.
Reset key is integrated with described EOC head end master chips；
As shown in Fig. 2 described antisurge module includes：First electric capacity C1, the first inductance L1, Transient Suppression Diode
TVS, the first diode D1, the second diode D2, the 3rd diode D3, input Input and output end Output, described first
The negative electrode of the anode of diode D1 and the second diode D2 is connected and while be connected with one end of inductance, the second diode D2
Anode and the anode of the 3rd diode D3 be grounded simultaneously, the negative electrode and the moon of the 3rd diode D3 of described the first diode D1
Pole is both connected on power vd D, described Transient Suppression Diode TVS one end respectively with the first inductance L1 and output end Output
Be connected, the other end of Transient Suppression Diode TVS ground connection, described first electric capacity C1 one end respectively with input Input and the
One inductance L1 is connected, first electric capacity C1 other ends ground connection.
Antisurge module of the present utility model enters row buffering, inductance to dash current and offsets dash current using buffer circuit
Partial action, and surge is released using two-stage surge circuit, effectively surge can be protected.
As shown in figure 3, described electromagnetic compatibility filtration module includes input and output end, the input includes live wire
Input L and zero line input N, output end include fire wire output end L ' and zero line output end N ', live wire input L it is defeated with live wire
Go out to hold and be connected in series between L ' the second inductance L2, be connected in series with the 3rd between zero line input N and zero line output end N ' electric
Sense L3, live wire input L and zero line input N are connected with the second electric capacity C2, live wire input L near the second inductance L2 one
End and zero line input N are connected with first resistor R1 between one end of the 3rd inductance L3, the other end of the second inductance L2 with
The 3rd electric capacity C3, fire wire output end L are connected between the other end of the 3rd inductance L3 ' it is connected in series with the with zero line output end N '
Three electric capacity C3 and the 4th electric capacity C4, the tie point ground connection between the 3rd electric capacity C3 and the 4th electric capacity C4.
Electromagnetic compatibility filtration module Electro Magnetic Compatibility is good, significantly improves anti-tampering performance, extends making for EOC head ends
Use the life-span.
The input Input of described antisurge module is connected with DC socket, described output end Output with it is described
The live wire input L of electromagnetic compatibility filtration module is connected, fire wire output end L of described electromagnetic compatibility filtration module ' and power supply
Chip is connected.
EOC headends first line of a couplet internet signal and cable TV signal in the utility model, second line of a couplet domestic consumer's
EOC terminals, realize internet signal and cable TV signal be converted and modulation etc. processes Jing duplexer filters modules and exports
Mouthful output, is transmitted by coaxial cable, is realized and the connection purpose of EOC terminal equipment, simultaneously because the utility model devise it is many
Individual duplexer filter thus have multiple output ports, realization be connected with multiple EOC terminal equipment, the EOC head ends in the utility model
Second input of master chip includes optical interface input and electrical interface input.
By improve Electro Magnetic Compatibility and antisurge performance, the protection to EOC head ends is enhanced, extend EOC heads
The end pot life, it is therefore necessary to needing to consider installation electromagnetical compatibility performance and antisurge when EOC head ends are designed
Energy.
Claims (5)
1. a kind of indoor type single module multiport EOC head ends, it is characterised in that：It include DC socket, power supply chip, switch,
EOC head end master chips, radio frequency chip, two distributors, duplexer filter and Attenuation adjustable device；
The input incoming cable television signal of described Attenuation adjustable device, the output end of described Attenuation adjustable device with it is described
The first input end of EOC head end master chips is connected；The input of described switch accesses internet signal, described switch
Output end be connected with the second input of described EOC head end master chips, the output end of described EOC head end master chips with penetrate
The input of frequency chip is connected, and the output end of described radio frequency chip is connected with two distributor inputs, two described distributors
Output end be connected with multiple duplexer filters；
DC socket is provided with described power supply chip；
Antisurge module and electromagnetic compatibility filtration module are integrated with described power supply chip.
2. a kind of indoor type single module multiport EOC head ends according to claim 1, it is characterised in that：Described EOC head ends
Reset key is integrated with master chip.
3. a kind of indoor type single module multiport EOC head ends according to claim 1, it is characterised in that：Described antisurge
Module includes：First electric capacity C1, the first inductance L1, Transient Suppression Diode TVS, the first diode D1, the second diode D2,
The moon of three diode D3, input Input and output end Output, the anode of the first diode D1 and the second diode D2
Extremely it is connected and while is connected with one end of inductance, the anode of the second diode D2 and the anode of the 3rd diode D3 connect simultaneously
Ground, the described negative electrode of the first diode D1 and the negative electrode of the 3rd diode D3 is both connected on power vd D, described transient state suppression
Diode TVS one end processed is connected respectively with the first inductance L1 with output end Output, the other end of Transient Suppression Diode TVS
Ground connection, first described electric capacity C1 one end is connected respectively with input Input and the first inductance L1, another terminations of the first electric capacity C1
Ground.
4. a kind of indoor type single module multiport EOC head ends according to claim 3, it is characterised in that：Described electromagnetism is simultaneous
Capacitor filter module includes input and output end, and the input includes live wire input L and zero line input N, output end bag
Include fire wire output end L and be connected in series with the second inductance between ' and zero line output end N ', live wire input L and fire wire output end L '
The 3rd inductance L3, live wire input L and zero line input are connected in series between L2, zero line input N and zero line output end N '
N is connected with the second electric capacity C2, and live wire input L is near one end of the second inductance L2 and zero line input N near the 3rd inductance L3
One end between be connected between the other end of first resistor R1, the other end of the second inductance L2 and the 3rd inductance L3 and be connected with
Three electric capacity C3, fire wire output end L ' it is connected in series with the 3rd electric capacity C3 and the 4th electric capacity C4, the 3rd electric capacity with zero line output end N '
Tie point ground connection between C3 and the 4th electric capacity C4.
5. a kind of indoor type single module multiport EOC head ends according to claim 4, it is characterised in that：Described antisurge
The input Input of module is connected with DC socket, the fire of described output end Output and described electromagnetic compatibility filtration module
Line input L is connected, fire wire output end L of described electromagnetic compatibility filtration module ' it is connected with power supply chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621005780.XU CN206164712U (en) | 2016-08-31 | 2016-08-31 | Indoor type single mode multiport EOC head end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621005780.XU CN206164712U (en) | 2016-08-31 | 2016-08-31 | Indoor type single mode multiport EOC head end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206164712U true CN206164712U (en) | 2017-05-10 |
Family
ID=58649503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621005780.XU Active CN206164712U (en) | 2016-08-31 | 2016-08-31 | Indoor type single mode multiport EOC head end |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206164712U (en) |
-
2016
- 2016-08-31 CN CN201621005780.XU patent/CN206164712U/en active Active
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