CN103873807A - Indoor splitter of cable TV system - Google Patents
Indoor splitter of cable TV system Download PDFInfo
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- CN103873807A CN103873807A CN201210529745.8A CN201210529745A CN103873807A CN 103873807 A CN103873807 A CN 103873807A CN 201210529745 A CN201210529745 A CN 201210529745A CN 103873807 A CN103873807 A CN 103873807A
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- signal
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Abstract
The invention relates to an indoor splitter of a cable TV system. The indoor splitter receives a carrier wave signal output by an outdoor distributor, and transmits a cable TV signal in the carrier wave signal to a user-side TV through a signal-interruption detector for uses to watch. The indoor splitter comprises a voltage detection unit which can detect whether a cable TV cable between the indoor splitter and the user-side TV is cut off or illegally connected. When the cable TV cable between the indoor splitter and the user-side TV 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, a monitoring function is realized and cable TV signals are no longer transmitted to the user-side TV.
Description
Technical field
A kind of indoor splitter, especially a kind of indoor splitter being used in cable television system, wherein indoor splitter has the function that disconnected news detect.
Background technology
Cable television network system (Community Antenna Television Service, CATV) is a kind ofly to utilize coaxial cable to receive or the network system of TV transmission signal.Cable television network system is the long-distance transmission mode (system business is to user) for one-to-many, except utilizing coaxial cable transmission signal, still need and use amplifier (Amplifier), splitter (Multi Tap) and the equipment such as power inserter (Power Inserter), transmission signal is sent to long-range user side.
Current cable network system is connected to user side TV by coaxial cable, coaxial cable is except transmission radio-frequency (RF) signal (Radio Frequency, RF) outside, and add power inserter (PowerInserter) with loading power signal in suitable distance, to provide power supply to operate to each equipment.
With regard to splitter, splitter has the function that transmission signal difference is become to 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 made up of distributor 41 (SpIitter), high frequency transformer 42 (Coupler) and main signal input end mouth 43,44, main signal output end mouth.
Radio-frequency (RF) signal transfers to distributor 41 via high frequency transformer 42, export from the first output port 411 and the second output port 412 again, converge into main signal and radio-frequency (RF) signal can be transmitted back high frequency transformer 42 again and reload power supply signal, and exported by main signal output end mouth 44, transfer to next place.Wherein be provided with in 45,46 of two electric capacity the inductance coil 47 that power supply source signal passes through.
But, whether the cable TV cable that now shortcoming of cable television system is to detect user side has is cut off or the stolen situation connecing, learn from the circuit box of Fig. 1, in the time that main signal output end mouth 44, the first output port 411 or the second output port 412 are cut off to the cable TV cable of user side TV, system control end also cannot detect this section of cable of cable TV and become disconnected news state, also just cannot carry out any antitheft conduct, such as stopping immediately transmission signal.In disconnected news process, because the system of cable of cable TV is still in transmitting signals, as long as being cut off to part, cable TV cable takes back, can continue to watch again cable TV, be so not only 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 connecing, to solve the disappearance of above-mentioned prior art.
Summary of the invention
Main purpose of the present invention is to provide a kind of indoor splitter of cable television system, the wherein mixed-signal of the outer distributor output of indoor splitter receiving chamber, and the cable television signal in mixed-signal will be sent to user side TV through disconnected news detector, view and admire for user.
Wherein indoor splitter includes voltage inspection unit, and voltage inspection unit is in order to detect the cable TV cable connection status between itself and user side TV.In the time that voltage inspection unit and user side TV are connected with disconnected news detector, transistor in voltage inspection unit enters conducting state, the mixed-signal that now the sustainable receiving system control end of indoor splitter comes through outdoor distributor transmission, and further send the cable television signal in mixed-signal to user side TV.
Otherwise, if remove the disconnected news detector of voltage inspection unit and user side TV, to make the transistor in voltage inspection unit enter cut-off state, and voltage inspection unit can produce and detects signal to system control end, system control end receives while detecting signal, can stop immediately outdoor distributor and transmit cable television signal to sending the indoor splitter that detects signal.
Therefore, whether the present invention can detect cable of cable TV and be cut off or steal the situation connecing, and uses and realizes monitoring function, and stop transmitting cable television signal to the indoor splitter that is detected disconnected news.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of the splitter of prior art;
Fig. 2 is the actual connection diagram of the indoor splitter of cable television system of the present invention;
Fig. 3 is the circuit box schematic diagram of the indoor splitter of cable television system of the present invention;
Fig. 4 is the exemplary circuit diagram of unit of the present invention.
Wherein, description of reference numerals is as follows:
The indoor splitter of 1 cable television system
10 signal separative elements
20 signal difference construction units
30 voltage inspection units
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
1a signal input end
1b, 1c signal output end
3 outdoor distributors
5,5 ' robber connects detector
7,7 ' user side TV
S mixed-signal
S1 cable television signal
S2 voltage signal
S11 the first cable television signal
S12 the second cable television signal
S21 the first voltage signal
The disconnected news of S22 voltage detects signal
S ' the first mixed-signal
S " the second mixed-signal
Embodiment
Below coordinate graphic and component symbol to do more detailed description to embodiments of the present invention, so that those of ordinary skill in the art are studying carefully after this specification and can implement according to this.
With reference to figure 2, for the actual connection diagram of the indoor splitter of cable television system of the present invention, with reference to figure 3, be the circuit box schematic diagram of the indoor splitter of cable television system of the present invention.As shown in Figure 2, the indoor splitter 1 of cable television system of the present invention 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 robber connect detector 5,5 ' be connected to user side TV 7,7 '.Wherein outdoor distributor 3 receives the mixed-signal S transmitting from system control end.
As shown in Figure 3, the indoor splitter 1 of cable television system of the present invention comprises signal separative element 10, signal difference construction unit 20, voltage inspection unit 30, the first signal mixing output unit 40 and the second signal mixing output unit 50.
The mixed-signal S that the indoor splitter 1 of cable television system of the present invention is exported in order to be received from outdoor distributor 3, and mixed-signal S is suitably processed, use the cable television signal in acquisition mixed-signal S, and by its be further dispensed to plural user side TV 7,7 '.
Shown in figure 3 and Fig. 4, signal separative element 10 of the present invention receives the mixed-signal S from the output output of outdoor distributor 3, and mixed-signal S is carried out to cable television 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 television signal S1, and received cable television signal S1 is further divided into the first cable television signal S11 and the second cable television signal S12, and sends out respectively.
The first signal mixing output unit 40 receives the first cable television signal S11 and the first voltage signal S21, and the first cable television signal S11 and the first voltage signal S21 are carried out to signal mixed processing, and then generation is mixed with the first mixed-signal S ' of the first cable television signal S11 and the first voltage signal S21, and the disconnected news of the first mixed-signal S ' warp detector 5 is sent to user side TV 7, view and admire user side TV 7 for user.
The second signal mixing output unit 50 receives the second cable television signal S12 and detects signal S22 with disconnected news voltage, and the second cable television signal S12 is detected to signal S22 with disconnected news voltage carry out signal mixed processing, and then produce the second mixed-signal S that is mixed with the second cable television signal S12 and disconnected news voltage and detects signal S22 "; and by the second mixed-signal S " through another user side TV 7 of another disconnected news detector 5 ' be sent to ', for user view and admire user side TV 7 '.
Fig. 4 is the exemplary circuit diagram of unit of the present invention, is noted that Fig. 4 is the exemplary embodiment that feature of the present invention is described, not in order to limit scope of the present invention, therefore, the present invention comprises other circuit design of equity mutually.
With reference to figure 4, signal separative element 10 of the present invention comprises capacitor and inductor, respectively in order to the voltage signal of filtering low frequency and the cable television signal of high frequency.Signal difference construction unit 20 comprises multiple resistance and a high frequency transformer.Voltage inspection unit 30 comprises multiple 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, in the time that 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, due to disconnected news detector 5, 5 ' and outdoor distributor 3 in be provided with the sectional pressure element as resistance, therefore see through and select the resistance of suitable numerical value and utilize voltage divider principle, can make the transistor Q1 of voltage inspection unit 30 enter conducting state, now indoor splitter 1 does not produce and detects signal, therefore the sustainable receiving system control end of indoor splitter 1 transmits and next mixed-signal S through outdoor distributor 3.
And further the first voltage signal S21 and disconnected news voltage are detected to signal S22 and be sent to respectively the first signal mixing output unit 40 and the second signal mixing output unit 50, 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 television signal S11 and the second cable television signal S12 "; and send to user side TV 7,7 ', to provide user to view and admire.
If disconnected news detector 5,5 ' while being removed, the transistor Q1 of voltage inspection unit 30 can enter cut-off state, now voltage inspection unit 30 can produce and detect signal and return to system control end, system control end receives while detecting signal, can stop immediately outdoor distributor 3 and transmit mixed-signal S to sending the indoor splitter 1 that detects signal, make user cannot watch cable TV.
The foregoing is only to explain preferred embodiment of the present invention, not attempt is done any pro forma restriction to the present invention according to this.Therefore, all have under identical invention spirit, do relevant any modification of the present invention or change, all must be included in the category that the invention is intended to protection.
Claims (6)
1. the indoor splitter of a cable television system, there are a signal input end and two signal output ends, this signal input end is connected with an output of an outdoor distributor, this outdoor distributor receives the mixed-signal transmitting from a system control end, and by 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, this indoor splitter of cable television system includes:
One signal separative element, receives this mixed-signal from this output output, and this mixed-signal is carried out to a cable television signal and the voltage signal that separating treatment is comprised to capture wherein, and send out respectively;
One signal difference construction unit, receives this cable television signal, and this received cable television signal is further divided into one first cable television signal and one second cable television signal, and sends out respectively;
One voltage inspection unit, receive this voltage signal, and detect it and hold between TV and whether have and connect this two disconnected news detector to these two users, and when a disconnected news detector is removed therein, produces one and detect signal, and be sent to this system control end, so that this outdoor distributor stops exporting this mixed-signal, if and this disconnected news detector is not removed, 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 television signal and this first voltage signal, and this first cable television signal and this first voltage signal are carried out to signal mixed processing, and then produce one first mixed-signal that is mixed with this first cable television 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 the disconnected news of this second cable television signal and this voltage and detect signal, and the disconnected news of this second cable television signal and this voltage is detected to signal carry out signal mixed processing, and then produce and be mixed with the disconnected news of this second cable television signal and this voltage and detect one second mixed-signal of signal, and via another disconnected news detector, the second mixed-signal is sent to another user side TV.
2. the indoor splitter 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 of cable television system as claimed in claim 1, is characterized in that, this signal difference construction unit comprises multiple resistance and a high frequency transformer.
4. the indoor splitter of cable television system as claimed in claim 1, is characterized in that, this voltage inspection unit comprises a transistor and multiple resistance.
5. the indoor splitter 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 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 |
|---|---|---|---|
| CN201210529745.8A CN103873807A (en) | 2012-12-11 | 2012-12-11 | Indoor splitter of cable TV system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210529745.8A CN103873807A (en) | 2012-12-11 | 2012-12-11 | Indoor splitter of cable TV system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103873807A true CN103873807A (en) | 2014-06-18 |
Family
ID=50911891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210529745.8A Pending CN103873807A (en) | 2012-12-11 | 2012-12-11 | Indoor splitter of cable TV system |
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| Country | Link |
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| CN (1) | CN103873807A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736916A (en) * | 2017-04-17 | 2018-11-02 | 东莞百电子有限公司 | A kind of novel high-frequency head and wireless LTE integration systems |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2283952Y (en) * | 1996-12-31 | 1998-06-10 | 宋瑞萍 | Signal regulating device |
| JP2009088863A (en) * | 2007-09-28 | 2009-04-23 | Maspro Denkoh Corp | Millimeter wave reception system, and frequency converter |
| CN201274467Y (en) * | 2008-08-08 | 2009-07-15 | 福建三元达通讯股份有限公司 | Indoor signal coverage system and repeater applied to the system |
| JP2010263402A (en) * | 2009-05-07 | 2010-11-18 | Synclayer Inc | Catv system of ftth system |
| CN203057341U (en) * | 2012-12-11 | 2013-07-10 | 张镇非 | Indoor splitter structure of cable television system |
-
2012
- 2012-12-11 CN CN201210529745.8A patent/CN103873807A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2283952Y (en) * | 1996-12-31 | 1998-06-10 | 宋瑞萍 | Signal regulating device |
| JP2009088863A (en) * | 2007-09-28 | 2009-04-23 | Maspro Denkoh Corp | Millimeter wave reception system, and frequency converter |
| CN201274467Y (en) * | 2008-08-08 | 2009-07-15 | 福建三元达通讯股份有限公司 | Indoor signal coverage system and repeater applied to the system |
| JP2010263402A (en) * | 2009-05-07 | 2010-11-18 | Synclayer Inc | Catv system of ftth system |
| CN203057341U (en) * | 2012-12-11 | 2013-07-10 | 张镇非 | Indoor splitter structure of cable television system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736916A (en) * | 2017-04-17 | 2018-11-02 | 东莞百电子有限公司 | A kind of novel high-frequency head and wireless LTE integration systems |
| CN108736916B (en) * | 2017-04-17 | 2024-04-23 | 东莞百一电子有限公司 | Novel tuner and wireless LTE integration system |
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Application publication date: 20140618 |
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