CN203057341U - Indoor splitter structure of cable television system - Google Patents
Indoor splitter structure of cable television system Download PDFInfo
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- CN203057341U CN203057341U CN 201220678253 CN201220678253U CN203057341U CN 203057341 U CN203057341 U CN 203057341U CN 201220678253 CN201220678253 CN 201220678253 CN 201220678253 U CN201220678253 U CN 201220678253U CN 203057341 U CN203057341 U CN 203057341U
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Abstract
The utility model discloses the indoor splitter structure of a cable television system, wherein an indoor splitter is used for receiving carrier signals output by an outdoor distributor and then transmitting cable television signals among the carrier signals to a user-side television for users to view by means of a signal-interruption detector. The indoor splitter comprises a voltage detection unit used for detecting whether a cable television cable between the indoor splitter and the user-side television is cut off, illegally connected or not. When the cable television cable between the indoor splitter and the user-side television is cut off or illegally connected, the voltage detection unit generates a detection signal and then transmits the detection signal to a system control terminal. Therefore, the monitoring function is realized and cable television signals are no longer transmitted to the user-side television.
Description
Technical field
A kind of indoor splitter, especially a kind of indoor splitter that is used in the cable television system, wherein indoor splitter has the function that disconnected news detect.
Background technology
(Community Antenna Television Service is a kind ofly to utilize coaxial cable to receive or the network system of TV transmission signal CATV) to cable television network system.Cable television network system is the long distance transmission means (system merchant is to the user) for one-to-many, except utilizing the coaxial cable transmission signal, still need and use amplifier (Amplifier), splitter (Multi Tap) and power inserter equipment such as (Power Inserter), transmission signal is sent to long-range user side.
The current cable network system is connected to the user side TV by coaxial cable, coaxial cable is except transmission radio-frequency (RF) signal (Radio Frequency, RF) outside, and suitably adding power inserter (PowerInserter) with the loading power signal apart from meeting, so that being provided, power supply operates to each equipment.
With regard to splitter, splitter has the function that the transmission signal difference is become multichannel.With reference to figure 1, be the circuit block diagram of the splitter of prior art, wherein main signal comprises the power supply signal (AC90V 10A) that is loaded with radio-frequency (RF) signal (RF).Splitter is mainly by distributor 41 (SpIitter), high frequency transformer 42 (Coupler) and main signal input end mouth 43,44 formations of main signal output end mouth.
Radio-frequency (RF) signal transfers to distributor 41 via high frequency transformer 42, again from first output port 411 and 412 outputs of second output port, converge into main signal and radio-frequency (RF) signal can be transmitted back high frequency transformer 42 again and reload power supply signal, and by main signal output end mouth 44 outputs, transfer to next place.Wherein be provided with the inductance coil 47 that the power supply source signal passes through in two electric capacity 45,46.
Yet, now whether the shortcoming of the cable television system cable TV cable that is to detect user side has and is cut off or the stolen situation that connects, learn from the circuit box of Fig. 1, when main signal output end mouth 44, first output port 411 or second output port 412 are cut off to the cable TV cable of user side TV, system's control end also can't detect this section cable of cable TV and become disconnected news state, also just can't carry out any antitheft conduct, such as stopping transmission signal immediately.In disconnected news process, because of the system of cable of cable TV still in transmitting signals, take back as long as the cable TV cable is cut off partly, can continue to watch cable TV again, so not only be unfavorable for dealer's operation, to paying viewer unfairness especially.
Therefore, must provide a kind of cable of cable TV that can detect whether to be cut off or to steal the indoor splitter that connects, to solve the disappearance of above-mentioned prior art.
The utility model content
Main purpose of the present utility model is to provide a kind of indoor splitter structure of cable television system, the mixed-signal of the outer distributor output of indoor splitter receiving chamber wherein, and the cable TV signal in the mixed-signal will be sent to the user side TV through disconnected news detector, view and admire for the user.
Wherein indoor splitter includes voltage and detects the unit, and voltage detects the unit in order to detect the cable TV cable connection status between itself and the user side TV.When voltage detects unit and user side TV when being connected with disconnected news detector, the transistor that voltage detects in the unit then enters conducting state, the mixed-signal that the sustainable receiving system control end of indoor splitter this moment comes through outdoor distributor transmission, and further send the cable TV signal in the mixed-signal to the user side TV.
Otherwise, if remove the disconnected news detector that voltage detects unit and user side TV, the transistor that voltage is detected in the unit is entered cut-off state, and voltage detects the unit and can produce and detect signal and give system's control end, system's control end receives when detecting signal, can stop outdoor distributor immediately and transmit the cable TV signal to sending the indoor splitter that detects signal.
Therefore, whether the utility model can detect cable of cable TV and be cut off or steal the situation that connects, and uses the realization monitoring function, and stops to transmit the cable TV signal to the indoor splitter that is detected disconnected news.
Description of drawings
Fig. 1 is the circuit block diagram of the splitter of prior art;
Fig. 2 is the actual connection diagram of the indoor splitter structure of cable television system of the present utility model;
Fig. 3 is the circuit box schematic diagram of the indoor splitter structure of cable television system of the present utility model;
Fig. 4 is the exemplary circuit diagram of each unit of the utility model.
Wherein, description of reference numerals is as follows:
The indoor splitter structure of 1 cable television system
10 signal separative elements
20 signal difference construction units
30 voltages detect the unit
40 first signal mixing output units
50 second signal mixing output units
41 distributors
42 high frequency transformers
43 main signal input end mouths
44 main signal output end mouths
45,46 electric capacity
47 inductance coils
411 first output ports
412 second output ports
The 1a signal input end
1b, 1c signal output end
3 outdoor distributors
5,5 ' robber connects detector
7,7 ' user side TV
The S mixed-signal
S1 cable TV signal
The S2 voltage signal
The S11 first cable TV signal
The S12 second cable TV signal
S21 first voltage signal
The disconnected news of S22 voltage detects signal
S ' first mixed-signal
S " second mixed-signal
Embodiment
Those of ordinary skill in the art below cooperate graphic and component symbol is done more detailed description to execution mode of the present utility model, so that can implement after studying this specification carefully according to this.
With reference to figure 2, for the actual connection diagram of the indoor splitter structure of cable television system of the present utility model, with reference to figure 3, be the circuit box schematic diagram of the indoor splitter structure of cable television system of the present utility model.As shown in Figure 2, the indoor splitter structure 1 of cable television system of the present utility model has a signal input end 1a and two signal output end 1b, 1c, signal input end 1a is connected with the output of outdoor distributor 3, and two signal output end 1b, 1c respectively via the robber connect detector 5,5 ' be connected to user side TV 7,7 '.Wherein outdoor distributor 3 receives the mixed-signal S that transmits from system's control end.
As shown in Figure 3, the indoor splitter structure 1 of cable television system of the present utility model comprises that signal separative element 10, signal difference construction unit 20, voltage detect unit 30, the first signal mixing output unit 40 and the second signal mixing output unit 50.
The indoor splitter structure 1 of cable television system of the present utility model is in order to be received from the mixed-signal S of outdoor distributor 3 outputs, and mixed-signal S suitably handled, use the cable TV signal among the acquisition mixed-signal S, and with its further be dispensed to plural user side TV 7,7 '.
With reference to figure 3 and shown in Figure 4, signal separative element 10 of the present utility model receives the mixed-signal S from the output output of outdoor distributor 3, and mixed-signal S carried out cable TV signal S1 and voltage signal (robber connects and the detects signal) S2 that separating treatment is comprised to capture wherein, and send out respectively.
Signal difference construction unit 20 receives cable TV signal S1, and the cable TV signal S1 that receives is further divided into the first cable TV signal S11 and the second cable TV signal S12, and sends out respectively.
The first signal mixing output unit 40 receives the first cable TV signal S11 and the first voltage signal S21, and the first cable TV signal S11 and the first voltage signal S21 carried out the signal mixed processing, and then generation is mixed with the first mixed-signal S ' of the first cable TV signal S11 and the first voltage signal S21, and the disconnected news of first mixed-signal S ' warp detector 5 is sent to user side TV 7, view and admire user side TV 7 for the user.
The second signal mixing output unit 50 receives the second cable TV signal S12 and detects signal S22 with disconnected news voltage, and the second cable TV signal S12 is detected signal S22 with disconnected news voltage carry out the signal mixed processing, and then produce and to be mixed with the second mixed-signal S that the second cable TV signal S12 and disconnected news voltage detect signal S22 "; and with the second mixed-signal S " through another user side TV 7 of another disconnected news detector 5 ' be sent to ', for the user view and admire user side TV 7 '.
Fig. 4 is the exemplary circuit diagram of each unit of the utility model, is noted that Fig. 4 is in order to the exemplary embodiment of the utility model feature to be described, is not in order to limit scope of the present utility model.Therefore, the utility model comprises other circuit design of equity mutually.
With reference to figure 4, signal separative element 10 of the present utility model comprises capacitor and inductor, respectively in order to the voltage signal of filtering low frequency and the cable TV signal of high frequency.Signal difference construction unit 20 comprises a plurality of resistance and a high frequency transformer.Voltage detects unit 30 and comprises a plurality of resistance and transistor.The first signal mixed cell 40 comprises capacitor and inductor.The second signal mixed cell 50 also comprises capacitor and inductor.
Wherein, when the signal input end 1a of indoor splitter 1 is connected with outdoor distributor 3, and the signal output end 1b of indoor splitter 1,1c and user side TV 7,7 ' between be connected with disconnected news detector 5,5 ' time, because disconnected news detector 5,5 ' and outdoor distributor 3 in be provided with sectional pressure element as resistance, therefore see through and select the resistance of suitable numerical value for use and utilize voltage divider principle, the transistor Q1 that can make voltage detect unit 30 enters conducting state, indoor splitter 1 did not produce and detected signal this moment, and therefore indoor splitter 1 sustainable receiving system control end transmits and next mixed-signal S through outdoor distributor 3.
And further the first voltage signal S21 and disconnected news voltage are detected signal S22 and be sent to the first signal mixing output unit 40 and the second signal mixing output unit 50 respectively, making the first voltage signal S21 and disconnected news voltage detect signal S22 is able to be mixed into the first mixed-signal S ' and the second mixed-signal S with the first cable TV signal S11 and the second cable TV signal S12 "; and send to user side TV 7,7 ', view and admire so that the user to be provided.
If disconnected news detector 5,5 ' when being removed, the transistor Q1 that voltage detects unit 30 can enter cut-off state, voltage detected unit 30 and can produce and detect signal and system's control end is given in passback this moment, system's control end receives when detecting signal, can stop outdoor distributor 3 immediately and transmit mixed-signal S to sending the indoor splitter 1 that detects signal, make the user can't watch cable TV.
The above in order to explain preferred embodiment of the present utility model, is not that attempt is done any pro forma restriction to the utility model according to this only.Therefore, all have in that identical utility model spirit is following do relevant any modification of the present utility model or change, all must be included in the category of the utility model intention protection.
Claims (6)
1. the indoor splitter structure of a cable television system, have a signal input end and two signal output ends, this signal input end links to each other with an output of an outdoor distributor, this outdoor distributor receives a mixed-signal that transmits from system's control end, and with this mixed-signal output, two signal output ends are connected to two users through two robbers connect detector and hold TV, it is characterized in that the indoor splitter of this of cable television system includes:
One signal separative element receives this mixed-signal from this output output, and this mixed-signal is carried out a cable TV signal and the voltage signal that separating treatment is comprised to capture wherein, and sends out respectively;
One signal difference construction unit receives this cable TV signal, and this cable TV signal that receives is further divided into one first cable TV signal and one second cable TV signal, and sends out respectively;
One voltage detects the unit, receive this voltage signal, and detect it and hold whether to have between the TV to these two users and connect two disconnected news detectors, and when a disconnected news detector is removed therein, produces one and detect signal, and be sent to this system's control end, so that this outdoor distributor stops to export this mixed-signal, and if should not be removed by disconnected news detector, then this voltage signal is further divided into one first voltage signal and a disconnected news voltage and detects signal, and send out respectively;
One first signal mixing output unit, receive this first cable TV signal and this first voltage signal, and this first cable TV signal and this first voltage signal carried out the signal mixed processing, and then produce one first mixed-signal that is mixed with this first cable TV signal and this first voltage signal, and via this disconnected news detector this first mixed-signal is sent to this user side TV; And
One second signal mixing output unit, receive this second cable TV signal and should detect signal by disconnected news voltage, and to this second cable TV signal with should disconnected news voltage detect signal and carry out the signal mixed processing, and then produce and be mixed with this second cable TV signal and one second mixed-signal that should disconnected news voltage detects signal, and via another disconnected news detector second mixed-signal is sent to another user side TV.
2. the indoor splitter structure of cable television system as claimed in claim 1 is characterized in that, this signal separative element comprises a capacitor and an inductor.
3. the indoor splitter structure of cable television system as claimed in claim 1 is characterized in that, this signal difference construction unit comprises a plurality of resistance and a high frequency transformer.
4. the indoor splitter structure of cable television system as claimed in claim 1 is characterized in that, this voltage detects the unit and comprises a transistor and a plurality of resistance.
5. the indoor splitter structure of cable television system as claimed in claim 1 is characterized in that, this first signal mixed cell comprises a capacitor and an inductor.
6. the indoor splitter structure of cable television system as claimed in claim 1 is characterized in that, this second signal mixed cell also comprises a capacitor and an inductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220678253 CN203057341U (en) | 2012-12-11 | 2012-12-11 | Indoor splitter structure of cable television system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220678253 CN203057341U (en) | 2012-12-11 | 2012-12-11 | Indoor splitter structure of cable television system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203057341U true CN203057341U (en) | 2013-07-10 |
Family
ID=48740254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220678253 Expired - Fee Related CN203057341U (en) | 2012-12-11 | 2012-12-11 | Indoor splitter structure of cable television system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203057341U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103873807A (en) * | 2012-12-11 | 2014-06-18 | 张镇非 | Indoor splitter of cable TV system |
-
2012
- 2012-12-11 CN CN 201220678253 patent/CN203057341U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103873807A (en) * | 2012-12-11 | 2014-06-18 | 张镇非 | Indoor splitter of cable TV system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20161211 |