CN2631159Y - Cable television two-way terminal controller - Google Patents
Cable television two-way terminal controller Download PDFInfo
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- CN2631159Y CN2631159Y CN 03218893 CN03218893U CN2631159Y CN 2631159 Y CN2631159 Y CN 2631159Y CN 03218893 CN03218893 CN 03218893 CN 03218893 U CN03218893 U CN 03218893U CN 2631159 Y CN2631159 Y CN 2631159Y
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Abstract
The utility model involves a wired transmission and distribution network technology field, in particular to a cable television bidirectional terminal controller. The utility model needs to improve problems of prior technology with too many joints, a big difference in return path equilibrium, a bad quality of signal, unable to control passing and breaking status of each user ports signal in head room. In order to improve the problems of prior technology, the technical scheme of the utility model is a cable television bidirectional terminal controller, includes a radio frequency amplification module (1), a data demodulating module (2) and a power module (5), the unique features are that including a control module (4) and a signal distribution module (3), the power module (5) is connected with the radio frequency amplification module (1) and the data demodulating module (2), the radio frequency amplification module (1) includes two parts, one part is connected with the signal distribution module (3); the other part is connected with the control module (4) through the data demodulating module (2), the control module (4) is connected with the signal distribution module (3).
Description
Affiliated technical field:
The utility model relates to wire transmission and distribution network technical field, is specifically related to a kind of cable TV bidirectional terminal controller.
Background technology:
Existing wired transmission and distribution network such as traditional " tree type " method of salary distribution of wired TV capacitor C A triode TV system's employing, distribution network is to be made of common branch, distributor.Because device disperses not manageability, joint is too many, and it is big to return balanced difference, and the outside noise harm of introducing is big especially, and poor signal quality makes that the cable TV transmitted in both directions is difficult to realize.And this nonstandard " tree type " distribution network, can't control the on off operating mode of each subscriber port signals at headend room, so it is unfavorable for that cable television system develops to the direction of wide-band-message net comprehensive utilization, is eliminated at last at all.
Summary of the invention:
It is too many that the utility model will overcome the prior art joint, and it is big to return balanced difference, and poor signal quality can't be controlled the shortcoming of the on off operating mode of each subscriber port signals at headend room.
For overcoming the shortcoming of prior art, the technical solution of the utility model is: a kind of cable TV bidirectional terminal controller, comprise RF Amplifier Module 1, data demodulation module 2 and power module 5, its special character is: also comprise control module 4 and signal distribution module 3, described power module 5 is connected in RF Amplifier Module 1 and data demodulation module 2,1 fen two-way of RF Amplifier Module, the one tunnel connects signal distribution module 3; To control module 4, control module 4 connects signal distribution module 3 through data demodulation module 2 on another road.
Comprise ic chip 401, ic chip 402, ic chip 403, ic chip 404 and ic chip 405 in the described control module 4, resistance R 401, resistance R 402, resistance R 403, resistance R 404, crystal oscillator JT401, capacitor C 401, capacitor C 402 and light-emitting diode D401; Described resistance R 401 1 end ground connection, the 2nd pin of other end connecting resistance R402 and ic chip 401, another termination 5V power supply of resistance R 402, resistance R 403 1 termination 5V power supplys, the 7th pin of the 1st pin of the other end and ic chip 401, the negative pole of light-emitting diode D401, ic chip 402 links, resistance R 404 1 termination 5V power supplys, the positive pole of other end sending and receiving optical diode D401; 8,9 pin of ic chip 402 and 5,6 pin of ic chip 403 link, corresponding respectively 2,4,6,8,11,13,15,17 pin that are connected to ic chip 404 of 8 pin ones, 0,11,12,13,14,15,16,17 pin of ic chip 402 delivery outlet B, corresponding respectively 2,4,6,8,11,13,15,17 pin that are connected to ic chip 405 of 8 pin ones, 8,19,20,21,22,23,24,25 pin of ic chip 402 delivery outlet C; 18 of ic chip 404,16,14,12,3,5,7,9 pin, corresponding respectively be connected to electronic switch MK1 in the signal distribution module 3 to the signal input end DY1 of electronic switch MK8 to signal input end DY8 pin, 18 of ic chip 405,16,14,12,3,5,7,9 pin, corresponding respectively be connected to electronic switch MK9 in the signal distribution module 3 to the signal input end DY9 of electronic switch MK16 to signal input end DY16 pin, 3 of ic chip 402,5,6 pin are unsettled, the 26th, 27 pin connect the two ends of 4MHz crystal oscillator JT401, and the two ends of crystal oscillator JT401 also are connected to the capacitor C 201 of ground connection respectively, capacitor C 202.
Described signal distribution module 3 comprises signal distribution network and electronic switch two parts:
1. signal distribution network is by two distributor B300; One splitter B301, a splitter B302, a splitter B303, a splitter B304, a splitter B305, a splitter B306, a splitter B307, a splitter B308, a splitter B309, a splitter B310, a splitter B311, a splitter B312, a splitter B313, a splitter B314, a splitter B315, a splitter B316; Resistance R 300, resistance R 301, resistance R 302, resistance R 303, resistance R 304, resistance R 305, resistance R 306, resistance R 307, resistance R 308, resistance R 309, resistance R 310, resistance R 311, resistance R 312, resistance R 313, resistance R 314, resistance R 315, resistance R 316, resistance R 317, resistance R 318; Capacitor C 300, capacitor C 301, capacitor C 302, capacitor C 303, capacitor C 304, capacitor C 305, capacitor C 306, capacitor C 307, capacitor C 308, capacitor C 309, capacitor C 310, capacitor C 311, capacitor C 312, capacitor C 313, capacitor C 314, capacitor C 315, capacitor C 316 elements such as grade are formed, wherein the input of two distributor B300 is attached to the output of RF Amplifier Module 1, resistance R 300 is connected in parallel between the input and ground of two distributor B300, two outputs of two distributor B300 respectively with capacitor C 301, the input of one splitter B301 and capacitor C 309, the input of one splitter B309 links, a splitter B301, the output of one splitter B309 respectively with capacitor C 302, the input of one splitter B302 and capacitor C 310, the input of one splitter B310 links; The branch end of one splitter B301, a splitter B309 is Yi Bian respectively by resistance R 301, resistance R 309 ground connection, the other end links with radio-frequency (RF) signal input end DA1, the radio-frequency (RF) signal input end DA9 end of electronic switch MK1, electronic switch MK9 respectively; One splitter B302, the output of one splitter B310 respectively with capacitor C 303, the input of one splitter B303 and capacitor C 311, the input of one splitter B311 links, one splitter B302, the branch end of one splitter B310, on one side respectively by resistance R 302, resistance R 310 ground connection, the other end respectively with electronic switch MK2, the radio-frequency (RF) signal input end DA2 of electronic switch MK10, radio-frequency (RF) signal input end DA10 end links a splitter B303, the output of one splitter B311 respectively with capacitor C 304, the input of one splitter B304 and capacitor C 312, the input of one splitter B312 links; The branch end of one splitter B303, a splitter B311 is Yi Bian respectively by resistance R 303, resistance R 311 ground connection, the other end links with radio-frequency (RF) signal input end DA3, the radio-frequency (RF) signal input end DA11 end of electronic switch MK3, electronic switch MK11 respectively; The output of one splitter B304, a splitter B312 links with the input of the input of capacitor C 305, a splitter B305 and capacitor C 313, a splitter B313 respectively, the branch end of one splitter B304, a splitter B312, on one side respectively by resistance R 304, resistance R 312 ground connection, the other end links with radio-frequency (RF) signal input end DA4, the radio-frequency (RF) signal input end DA12 end of electronic switch MK4, electronic switch MK12 respectively; The output of one splitter B305, a splitter B313 links with the input of the input of capacitor C 306, a splitter B306 and capacitor C 314, a splitter B314 respectively, the branch end of one splitter B305, a splitter B313, on one side respectively by resistance R 305, resistance R 313 ground connection, the other end links with radio-frequency (RF) signal input end DA5, the radio-frequency (RF) signal input end DA13 end of electronic switch MK5, electronic switch MK13 respectively; The output of one splitter B306, a splitter B314 links with the input of the input of capacitor C 307, a splitter B307 and capacitor C 315, a splitter B315 respectively, the branch end of one splitter B306, a splitter B314, on one side respectively by resistance R 306, resistance R 314 ground connection, the other end links with radio-frequency (RF) signal input end DA6, the radio-frequency (RF) signal input end DA14 end of electronic switch MK6, electronic switch MK14 respectively; The output of one splitter B307, a splitter B315 links with the input of the input of capacitor C 308, a splitter B308 and capacitor C 316, a splitter B316 respectively, the branch end of one splitter B307, a splitter B315, on one side respectively by resistance R 307, resistance R 315 ground connection, the other end links with radio-frequency (RF) signal input end DA7, the radio-frequency (RF) signal input end DA15 end of electronic switch MK7, electronic switch MK15 respectively; The output of one splitter B308, a splitter B316 is respectively by resistance R 317, resistance R 318 ground connection; The branch end of one splitter B308, a splitter B316 is Yi Bian respectively by resistance R 308, resistance R 316 ground connection, the other end links with radio-frequency (RF) signal input end DA8, the radio-frequency (RF) signal input end DA16 end of electronic switch MK8, electronic switch MK16 respectively;
2. electronic switch partly contains 16 electronic switches altogether.Described electronic switch is by resistance R 01, resistance R 02, resistance R 03, resistance R 04, resistance R 05, resistance R 06, resistance R 07, resistance R 08 and resistance R 09, capacitor C 01, capacitor C 02, capacitor C 03, capacitor C 04, capacitor C 05, capacitor C 06, capacitor C 07, inductor L01, inductor L02, inductor L03, inductor L04, inductor L05, inductor L06, inductor L07, PIN diode D01, PIN diode D02, PIN diode D03, PIN diode D04, light-emitting diode D05 element constitute; Wherein, capacitor C 01 1 ends and radio-frequency (RF) signal input end DA and resistance R 01 link, and the other end and inductor L01, PIN diode D01 link; The other end connecting resistance R02 of inductor L01, another termination 2.5V reference voltage input of resistance R 02, resistance R 03, resistance R 06, resistance R 07, resistance R 08; The other end of PIN diode D01 and inductor L02, inductor L03, PIN diode D02 link, and the other end of PIN diode D02 and capacitor C 02, resistance R 03 link; The other end ground connection of resistance R 01, resistance R 05, capacitor C 02, capacitor C 04, capacitor C 06, capacitor C 07, inductor L07, light-emitting diode D05, the other end of inductor L02 and resistance R 04, resistance R 05, resistance R 09, capacitor C 06, capacitor C 07, inductor L05 link; The other end of inductor L03 and inductor L04, capacitor C 03 link, the other end connecting resistance R06 of inductor L04, and the other end of capacitor C 03 and inductor L05, PIN diode D03, PIN diode D04 link; The other end of PIN diode D03 and capacitor C 04, resistance R 07 link, the other end of PIN diode D04 and capacitor C 05, inductor L06 link, the other end of inductor L06 and resistance R 08 link, the other end of capacitor C 05 and inductor L07 and radiofrequency signal output D0 link, the other end of resistance R 09 and light-emitting diode D05 link, and the other end of resistance R 04 and signal input end DY link.
Comprise resistance R 201 in the described data demodulation module 2, resistance R 202, resistance R 203, resistance R 204, resistance R 205, resistance R 206, resistance R 207, resistance R 208, resistance R 209, resistance R 210, resistance R 211, resistance R 212, resistance R 213, resistance R 214, resistance R 215, resistance R 216 and resistance R 217, capacitor C 201, capacitor C 202, capacitor C 203, capacitor C 204, capacitor C 205, capacitor C 206, capacitor C 207, capacitor C 208, capacitor C 209, capacitor C 210 and capacitor C 211, crystal oscillator JT201, triode T201, inductor L201, data demodulates chip IC 201, filter F501, filter F502; Described resistance R 201 1 ends and RF Amplifier Module 1, resistance R 202 link other end ground connection; The input of the other end of resistance R 202 and filter F501 links; The output of filter F501 is connected to 20 pin of data demodulates chip IC 201 by capacitor C 201; Crystal oscillator JT201 one end and capacitor C 202, capacitor C 203 link, and the other end is connected to the 2nd pin of data demodulates chip IC 201, and the earth terminal of capacitor C 203 connects 17 pin of data demodulates chip IC 201 by resistance R 203; The end of the other end of the other end of capacitor C 202 and capacitor C 202 and inductor L201 and the 3rd pin of data demodulates chip IC 201 link, and the other end of inductor L201 connects the 12V voltage input end by resistance R 217; The 7th pin of the end of filter F502 and resistance R 212, data demodulates chip IC 201 links, and the 5th pin of the other end and resistance R 213, data demodulates chip IC 201 links; The 18th pin of the base stage of triode T201 and resistance R 214, resistance R 215, resistance R 210 and data demodulates chip IC 201 links; Grounded emitter, the 3rd pin of ic chip 401 links in collector electrode and resistance R 216 and the control module 4; Between 17 pin of data demodulates chip IC 201 and triode T201 base stage, be connected to resistance R 210, be connected to resistance R 211 between 16 pin of data demodulates chip IC 201 and 13 pin; Connect between 14 pin of data demodulates chip IC 201 and 15 pin, resistance R 207, resistance R 209, the capacitor C 207 of branch's termination ground connection of 14 pin of data demodulates chip IC 201, in the indirect earthed resistance R 208 of resistance R 207 and resistance R 209, the 7th pin of data demodulates chip IC 201 connects with an end of resistance R 212, the other end of resistance R 212 by inductor L202 connect data demodulates chip IC 201 11 pin, by capacitor C 208 connect data demodulates chip IC 201 the 8th pin, connect the 9th pin of data demodulates chip IC 201, be parallel with capacitor C 211 on the inductor L202; 9 pin and 10 pin of data demodulates chip IC 201 link, and the 3rd pin of data demodulates chip IC 201 is connected to the contact of inductor L201 and capacitor C 202; The capacitor C 209 of ground connection and the capacitor C 210 of ground connection are connected between capacitor C 208 and the resistance R 212, another termination 5V voltage input end of inductor L202, and this voltage input end connects 17 pin of data demodulates chip IC 201 by inductor L203, resistance R 204; Between the contact of resistance R 204 and inductor L203 and inductor L201 and the capacitor C 204 and the capacitor C 205 that are connected with ground connection.
Compared with prior art, the utility model has the advantages that:
1, adopt the addressable management mode of central computer, can directly control the signal on off operating mode of each user port at headend room, its mode and telecommunication bureau are quite similar to the control of subscriber phone state.This is the main key problem that the utility model solves, just in order to solve charging problem.
2, need not former front end signal is carried out any processing, easy to use, guaranteed the transmission signals quality.
3, user's distribution network, subscriber's amplifier, user's addressable controller is integrated, the cost performance height.Anti-misfortune ability is stronger, safe and reliable, and installation specification helps the standardization of network, the standardization design.
4, the utility model can be compatible with the transmission of any signal, but and transmitted in both directions, good confidentiality, Any user can't obtain password, signal can only be controlled by headend room.
5, signal volume is big, can be used for cable TV and then no longer make equipment eliminate renewal because of the program capacity increases by the design of 750MHz/80 programs, and the data encryption modulator carrier is 110MHz or assigned frequency, does not take the standard cable television channels.
6, simple in structure, easy to manufacture, cost is low per family, is particularly suitable for the toll administration of cable TV comprehensive broadband network.
7, can suppress and overcome technical problems such as " upstream noise interference ", " data feedback channel fail safe " in the thorough solution network of interactive network, " compiling equilibrium " to greatest extent, and fundamentally solve the difficult problem of puzzlement cable TV network operator difficult charge for many years.
8, power unit adopts ring-like mutual inductance type stabilized voltage power supply and low tension switch formula stabilized voltage power supply to combine, utilize their advantage separately, ring-like mutual inductance type stabilized voltage power supply g-load ability is strong, can bear with the interference advantage of suppressing portion independent power source disturbing pulse and the pulse of induction lightening complicated ingredient and in conjunction with the high wide advantage of voltage range that adapts to of switching regulator stabilized voltage power supply efficient, learn from other's strong points to offset one's weaknesses, further increase the reliability of power supply.
9, towards the interactive mode design, be convenient to network upgrade.
10, this controller integrates radio frequency amplification, signal allocation, port controlling.Computer technology, mechanics of communication and cable TV technology are combined, promptly finished the transmission and the distribution of cable TV signal, realized the control that just can open or turn-off the rating state of each user port at headend room again.
Description of drawings:
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is a function square frame principle schematic diagram;
Fig. 3 is the circuit theory diagrams of power module;
Fig. 4 is the circuit theory diagrams of RF Amplifier Module and data demodulation module;
Fig. 5 is the circuit theory diagrams of control module;
Fig. 6 is the circuit theory diagrams of signal distribution network in the signal distribution module;
Fig. 7 is the circuit theory diagrams in the signal distribution module;
Fig. 8 is the external structure schematic diagram of a plurality of electronic switches.
Embodiment:
The utility model is optimized at the enforceable physical model of two-way net, on " concentrate theory of distribution ", " zero gain transmission system model ", " multipath suppresses the countermeasure that upstream noise disturbs ", " compiling equilibrium " scheduling theory basis, use " noise with disturb suppress " basic principle again, combined technology such as computer, communication, anti-interference, cable TV simultaneously.
Referring to Fig. 1, the utility model is made up of RF Amplifier Module 1, data demodulation module 2, control module 4, signal distribution module 3 and power module 5 five parts.Said power module 5 is connected in RF Amplifier Module 1 and data demodulation module 2,1 fen two-way of RF Amplifier Module, and one the tunnel connects signal distribution module 3; To control module 4, control module 4 connects signal distribution module 3 through data demodulation module 2 on another road.
Its basic functional principle is that hybrid resistor RF signal is delivered to the network end-point terminal control unit by transmission network, divides two-way to transmit after RF Amplifier Module 1 amplifies, and one the tunnel is assigned to each high frequency electronic switch through signal distribution module 3 with TV signal; The subscriber control information that send front-end computer through data demodulation module 2 on another road is delivered to control module 4, control module 4 reception/forwardings meet the subscriber control information of local address (terminal address) to signal distribution module 3, control turning on and off of each road electronic switch.Realization is controlled the rating state of each user to TV programme by headend room automatically by computer, promptly turns on and off.
Referring to Fig. 2～Fig. 8: below will be described in detail to each module.
Wherein said power module 5 comprises transformer B501, inductor L501, inductor L502, inductor L503, rectifier diode D501, rectifier diode D502, rectifier diode D503, rectifier diode D504, voltage stabilizing didoe D505, overvoltage protection diode D506, switching diode D507, switching diode D508, switching diode D509, triode T501, triode T502, field effect transistor T503, integrated circuit (IC) 501, integrated circuit (IC) 502, integrated circuit (IC) 503, resistance R 501, resistance R 502, resistance R 503, resistance R 504, resistance R 505, resistance R 506, resistance R 507, resistance R 508, resistance R 509, resistance R 510, resistance R 511, resistance R 512, resistance R 513, capacitor C 501, capacitor C 502, capacitor C 503, capacitor C 504, capacitor C 505, capacitor C 506, capacitor C 507, capacitor C 508, capacitor C 509, capacitor C 510, capacitor C 511, three terminal regulator LM7805, high power transistor T504; Wherein B501 utmost point of transformer by inductor L501 respectively with rectifier diode D501, rectifier diode D502, rectifier diode D503, rectifier diode D504 links, rectifier diode D502, the negative pole of rectifier diode D504 and capacitor C 501, capacitor C 502, capacitor C 511, resistance R 501, resistance R 502, resistance R 505, the S utmost point of triode T503 links, the drain electrode of triode T503 and overvoltage protection diode D506, inductor L502 links, the collector electrode of triode T501 and resistance R 502 link, base stage and resistance R 501 link, emitter and resistance R 503, capacitor C 507, integrated circuit (IC) 501, the octal of integrated circuit (IC) 502 links, the collector electrode of triode T502 is by resistance R 507, resistance R 508, resistance R 506 links with the grid of triode T503, base stage is by resistance R 509, capacitor C 504 links grounded emitter with the Q end of integrated circuit (IC) 502; Resistance R 504 links with 6,7 pin of integrated circuit (IC) 502 respectively, the anode of 1 pin of integrated circuit (IC) 501 and 5 pin of integrated circuit (IC) 502 and capacitor C 506 links, 2 pin and resistance R 511, resistance R 512, capacitor C 509, capacitor C 506 link, 3 pin and resistance R 510, capacitor C 508 and integrated circuit (IC) 503 link, and the other end of resistance R 510, resistance R 511, capacitor C 509 and inductor L502, inductor L503, capacitor C 505 link; The capacitor C 510 of the other end of inductor L503 and inductor L504, ground connection links, the out-primary of inductor L504 connects the input of integrated circuit (IC) 14, ground connection 2 pin of secondary winding termination integrated circuit (IC) 14, the 3rd pin of integrated circuit (IC) 14 is promptly exported an end of termination 5V voltage and resistance R 513, another termination switching diode D507 of resistance R 513; 2.5V the collector electrode of voltage and high power transistor T504, switching diode D507, switching diode D508, switching diode D509 series connection, the base stage of switching diode D509 and high power transistor T504 is joined grounded emitter.
Its operation principle is: at first by the 220V alternating voltage of transformer B501 with input, become low pressure 27V.Through rectifier diode D501, rectifier diode D502, rectifier diode D503, rectifier diode D504 rectification, capacitor C 501, capacitor C 502 filtering, output 35V direct voltage.Triode T501, resistance R 501, resistance R 502, voltage stabilizing didoe D505 form the 8V voltage stabilizing circuit, for integrated circuit (IC) 501, integrated circuit (IC) 502 provide supply power voltage.Integrated circuit (IC) 502 is the pulsewidth oscillator, the certain pulse signal of the 3rd pin output width, amplify through triode T502, the conducting of control triode T503 with end, pulse voltage by triode T503 drain electrode output, behind the two-stage inductor L capacitor C filter circuit smothing filtering that inductor L502, capacitor C 505, inductor L503, capacitor C 510 are formed, output 12V direct voltage.Through resistance R 11, resistance R 512, capacitor C 509 is received the 2nd pin of integrated circuit (IC) 501 to feedback voltage by the 12V output.When the output voltage rising, integrated circuit (IC) 501 the 2nd pin voltage also raises, and integrated circuit (IC) 501 the 1st pin current potential descends, and the pulse duration of integrated circuit (IC) 502 the 3rd pin output reduces, and output voltage reduces.Otherwise still.
5V voltage is to become D capacitor C 5V by supply voltage D capacitor C 12V through three terminal regulator LM7805; 5V voltage tells one the tunnel through capacitor filtering, obtains the 2.5V fixed bias voltage after resistance step-down and switching diode 1N4148, the voltage stabilizing of high power transistor TIP41 capacitor C, for the electronic switch in the signal distribution module 3 provides supply power voltage.
Wherein said RF Amplifier Module 1 comprises inductor L101, inductor L102, inductor L103, capacitor C 101, capacitor C 102, capacitor C 103, capacitor C 104, capacitor C 105, capacitor C 106, capacitor C 107 and capacitor C 108, discharge tube D101, attenuator ATT1, attenuator ATT2, equalizer EQ, bidirectional filter F1, bidirectional filter F2, forward amplification module MK1, reverse amplification module MK2; Capacitor C 101 1 ends and inductor L101, inductor L102, discharge tube D101 links, the input of the other end and bidirectional filter F1 links, capacitor C 103 1 ends and bidirectional filter F1 link, the other end and capacitor C 104, inductor L103 links, capacitor C 104 other ends and attenuator ATT1 link, the attenuator ATT1 other end and equalizer EQ link, the equalizer EQ other end and electronic switch MK1 input link, electronic switch MK1 output and capacitor C 105 link, capacitor C 105 other ends and bidirectional filter F2 link, bidirectional filter F2 output and capacitor C 106 link, the other end of bidirectional filter F2 and capacitor C 107 link, capacitor C 107 other ends and attenuator ATT2 link, the attenuator ATT2 other end and capacitor C 108 link, capacitor C 108 other ends and electronic switch MK2 input link, and the electronic switch MK2 output and the bidirectional filter F1 other end link; Inductor L102 connects with capacitor C 102, and both contacts are connected to the 60V ac input end, inductor L103, discharge tube D101, capacitor C 102 ground connection.Capacitor C 106 is joined with data demodulation module 2.
Its operation principle is: the downlink radio-frequency signal that sends through network (68～80dBuV) enter terminal control unit after, be coupled into bidirectional filter F1 through high-voltage capacitance 103Z/1KV, signal after process filtering is come out enters attenuator ATT1, advance again and enter the frequency response reconditioning circuit after equalizer EQ repairs through equilibrium, guarantee that curve enters amplification module electronic switch MK1 (12V power supply model is the HW7527 capacitor C) after smooth, signal is through after amplifying, enter bidirectional filter F2 filtering once more, one tunnel connection through the high temperature shielding conductor enters control signal and distribution module after the filtering, and one the tunnel enters data demodulation unit.
The up radiofrequency signal that sends by signal distribution network, be coupled into bidirectional filter F2 through capacitor C 106, signal after process filtering is come out is by attenuator attenuator ATT2, enter reverse amplification module MK2, signal is through after amplifying, enter bidirectional filter F1 filtering once more, send by capacitor C 101.
Comprise resistance R 201 in the wherein said data demodulation module 2, resistance R 202, resistance R 203, resistance R 204, resistance R 205, resistance R 206, resistance R 207, resistance R 208, resistance R 209, resistance R 210, resistance R 211, resistance R 212, resistance R 213, resistance R 214, resistance R 215, resistance R 216 and resistance R 217, capacitor C 201, capacitor C 202, capacitor C 203, capacitor C 204, capacitor C 205, capacitor C 206, capacitor C 207, capacitor C 208, capacitor C 209, capacitor C 210 and capacitor C 211, crystal oscillator JT201, triode T201, inductor L201, data demodulates chip IC 201, filter F501, filter F502; Described resistance R 201 1 ends and RF Amplifier Module 1, resistance R 202 link other end ground connection; The input of the other end of resistance R 202 and filter F501 links; The output of filter F501 is connected to 20 pin of data demodulates chip IC 201 by capacitor C 201; Crystal oscillator JT201 one end and capacitor C 202, capacitor C 203 link, and the other end is connected to the 2nd pin of data demodulates chip IC 201, connect 17 pin of data demodulates chip IC 201 by resistance R 203 at the earth terminal of capacitor C 203; The end of the other end of the other end of capacitor C 202 and capacitor C 202 and inductor L201 and the 3rd pin of data demodulates chip IC 201 link, and the other end of inductor L201 connects the 12V voltage input end by resistance R 217; The 7th pin of the end of filter F502 and resistance R 212, data demodulates chip IC 201 links, and the 5th pin of the other end and resistance R 213, data demodulates chip IC 201 links; The 18th pin of the base stage of triode T201 and resistance R 214, resistance R 215, resistance R 210 and data demodulates chip IC 201 links; Grounded emitter, the 3rd pin of collector electrode and resistance R 216 and the interior ic chip 401 of control module (4) links; Between 17 pin of data demodulates chip IC 201 and triode T201 base stage, be connected to resistance R 210, be connected to resistance R 211 between 16 pin of data demodulates chip IC 201 and 13 pin; Connect between 14 pin of data demodulates chip IC 201 and 15 pin, resistance R 207, resistance R 209, the capacitor C 207 of branch's termination ground connection of 14 pin of data demodulates chip IC 201, in the indirect earthed resistance R 208 of resistance R 207 and resistance R 209, the 7th pin of data demodulates chip IC 201 connects with an end of resistance R 212, the other end of resistance R 212 by inductor L202 connect data demodulates chip IC 201 11 pin, by capacitor C 208 connect data demodulates chip IC 201 the 8th pin, connect the 9th pin of data demodulates chip IC 201, be parallel with capacitor C 211 on the inductor L202; 9 pin and 10 pin of data demodulates chip IC 201 link, and the 3rd pin of data demodulates chip IC 201 is connected to the contact of inductor L201 and capacitor C 202; The capacitor C 209 of ground connection and the capacitor C 210 of ground connection are connected between capacitor C 208 and the resistance R 212, another termination 5V voltage input end of inductor L202, and this voltage input end connects 17 pin of data demodulates chip IC 201 by inductor L203, resistance R 204; Between the contact of resistance R 204 and inductor L203 and inductor L201 and the capacitor C 204 and the capacitor C 205 that are connected with ground connection.
Its operation principle is: signal after resistance R 202 enters filter F501, leaches 110MHz data carrier signal through capacitor C 106 couplings, enters input 20 pin of data demodulates chip IC 201 through capacitor C 201 again.Crystal oscillator JT201, capacitor C 202, capacitor C 203, inductor L201 constitute local concussion loop.The data carrier signal of local oscillation signal that produces and the input of 20 pin carries out mixing at chip internal.Signal after the mixing obtains second intermediate-freuqncy signal of 6.5MHz after ceramic filter F502 filtering.This signal transplants through the chip internal quadrature demodulation after the processing of circuit, restore data-signal, pass through a data shaping comparator of chip internal again, behind the filtering clutter, output to the base stage of triode T201 by 18 pin, after triode T201 paraphase, export the 3rd pin of ic chip 401 in the control module 4 to by collector electrode.
Comprise ic chip 401, ic chip 402, ic chip 403, ic chip 404 and ic chip 405 in the wherein said control module 4, resistance R 401, resistance R 402, resistance R 403, resistance R 404, crystal oscillator JT401, capacitor C 401, capacitor C 402 and lumination of light emitting diode diode D401; Described resistance R 401 1 end ground connection, the 2nd pin of other end connecting resistance R402 and ic chip 401, another termination 5V power supply of resistance R 402, resistance R 403 1 termination 5V power supplys, the 7th pin of the 1st pin of the other end and ic chip 401, the negative pole of light-emitting diode D401, ic chip 402 links, resistance R 404 1 termination 5V power supplys, the positive pole of other end sending and receiving optical diode D401; 8,9 pin of ic chip 402 and 5,6 pin of ic chip 403 link, corresponding respectively 2,4,6,8,11,13,15,17 pin that are connected to ic chip 404 of 8 pin ones, 0,11,12,13,14,15,16,17 pin of ic chip 402 delivery outlet B, corresponding respectively 2,4,6,8,11,13,15,17 pin that are connected to ic chip 405 of 8 pin ones, 8,19,20,21,22,23,24,25 pin of ic chip 402 delivery outlet capacitor C; 18 of ic chip 404,16,14,12,3,5,7,9 pin, corresponding respectively be connected to electronic switch MK1 in the signal distribution module 3 to the signal input end DY1 of electronic switch MK8 to signal input end DY8 pin, 18 of ic chip 405,16,14,12,3,5,7,9 pin, corresponding respectively be connected to electronic switch MK9 in the signal distribution module 3 to the signal input end DY9 of electronic switch MK16 to signal input end DY16 pin, 3 of ic chip 402,5,6 pin are unsettled, the 26th, 27 pin connect the two ends of 4MHz crystal oscillator JT401, and the two ends of crystal oscillator JT401 also are connected to the capacitor C 201 of ground connection respectively, capacitor C 202.
Its operation principle is: by the data-signal of data demodulation module 2, once more after the shaping, exported to the input pickup resistance RA1 of single-chip microcomputer (P integrated circuit (IC) 16 capacitor C 57) ic chip 402 through ic chip 401 by 1 pin.Single-chip microcomputer is with address information contained in the data-signal that receives, compare with the local address that is stored in erasable memory (the 24 inductor L capacitor C 01B) ic chip 403, take out the control signal of identical address, pass through two output port (the resistance R B mouths of self respectively, resistance R capacitor C mouth) 16 lead-out terminal resistance R B0 are to resistance R B7, resistance R capacitor C 0 is to resistance R capacitor C 7, deliver to multiplex driver (M capacitor C 74H capacitor C 244) ic chip 404, the respective input of ic chip 405, again by its corresponding output, export to signal distribution module 3 medium-high frequency electronic switch MK1 to the signal input end DY1 of electronic switch MK16 to signal input end DY16 terminal, to control opening or turn-offing of each user port.Lumination of light emitting diode diode D401 is the data indicator light, and the bright indication circuit of lamp is working properly, the lamp flicker, and expression has data to come.
Said described signal distribution module 3 comprises signal distribution network and electronic switch two parts:
1. signal distribution network is by two distributor B300; One splitter B301, a splitter B302, a splitter B303, a splitter B304, a splitter B305, a splitter B306, a splitter B307, a splitter B308, a splitter B309, a splitter B310, a splitter B311, a splitter B312, a splitter B313, a splitter B314, a splitter B315, a splitter B316; Resistance R 300, resistance R 301, resistance R 302, resistance R 303, resistance R 304, resistance R 305, resistance R 306, resistance R 307, resistance R 308, resistance R 309, resistance R 310, resistance R 311, resistance R 312, resistance R 313, resistance R 314, resistance R 315, resistance R 316, resistance R 317, resistance R 318; Capacitor C 300, capacitor C 301, capacitor C 302, capacitor C 303, capacitor C 304, capacitor C 305, capacitor C 306, capacitor C 307, capacitor C 308, capacitor C 309, capacitor C 310, capacitor C 311, capacitor C 312, capacitor C 313, capacitor C 314, capacitor C 315, capacitor C 316 elements such as grade are formed, wherein the input of two distributor B300 is attached to the output of RF Amplifier Module 1, resistance R 300 is connected in parallel between the input and ground of two distributor B300, two outputs of two distributor B300 respectively with capacitor C 301, the input of one splitter B301 and capacitor C 309, the input of one splitter B309 links, a splitter B301, the output of one splitter B309 respectively with capacitor C 302, the input of one splitter B302 and capacitor C 310, the input of one splitter B310 links; The branch end of one splitter B301, a splitter B309 is Yi Bian respectively by resistance R 301, resistance R 309 ground connection, the other end links with radio-frequency (RF) signal input end DA1, the radio-frequency (RF) signal input end DA9 end of electronic switch MK1, electronic switch MK9 respectively; One splitter B302, the output of one splitter B310 respectively with capacitor C 303, the input of one splitter B303 and capacitor C 311, the input of one splitter B311 links, one splitter B302, the branch end of one splitter B310, on one side respectively by resistance R 302, resistance R 310 ground connection, the other end respectively with electronic switch MK2, the radio-frequency (RF) signal input end DA2 of electronic switch MK10, radio-frequency (RF) signal input end DA10 end links a splitter B303, the output of one splitter B311 respectively with capacitor C 304, the input of one splitter B304 and capacitor C 312, the input of one splitter B312 links; The branch end of one splitter B303, a splitter B311 is Yi Bian respectively by resistance R 303, resistance R 311 ground connection, the other end links with radio-frequency (RF) signal input end DA3, the radio-frequency (RF) signal input end DA11 end of electronic switch MK3, electronic switch MK11 respectively; The output of one splitter B304, a splitter B312 links with the input of the input of capacitor C 305, a splitter B305 and capacitor C 313, a splitter B313 respectively, the branch end of one splitter B304, a splitter B312, on one side respectively by resistance R 304, resistance R 312 ground connection, the other end links with radio-frequency (RF) signal input end DA4, the radio-frequency (RF) signal input end DA12 end of electronic switch MK4, electronic switch MK12 respectively; The output of one splitter B305, a splitter B313 links with the input of the input of capacitor C 306, a splitter B306 and capacitor C 314, a splitter B314 respectively, the branch end of one splitter B305, a splitter B313, on one side respectively by resistance R 305, resistance R 313 ground connection, the other end links with radio-frequency (RF) signal input end DA5, the radio-frequency (RF) signal input end DA13 end of electronic switch MK5, electronic switch MK13 respectively; The output of one splitter B306, a splitter B314 links with the input of the input of capacitor C 307, a splitter B307 and capacitor C 315, a splitter B315 respectively, the branch end of one splitter B306, a splitter B314, on one side respectively by resistance R 306, resistance R 314 ground connection, the other end links with radio-frequency (RF) signal input end DA6, the radio-frequency (RF) signal input end DA14 end of electronic switch MK6, electronic switch MK14 respectively; The output of one splitter B307, a splitter B315 links with the input of the input of capacitor C 308, a splitter B308 and capacitor C 316, a splitter B316 respectively, the branch end of one splitter B307, a splitter B315, on one side respectively by resistance R 307, resistance R 315 ground connection, the other end links with radio-frequency (RF) signal input end DA7, the radio-frequency (RF) signal input end DA15 end of electronic switch MK7, electronic switch MK15 respectively; The output of one splitter B308, a splitter B316 is respectively by resistance R 317, resistance R 318 ground connection; The branch end of one splitter B308, a splitter B316 is Yi Bian respectively by resistance R 308, resistance R 316 ground connection, the other end links with radio-frequency (RF) signal input end DA8, the radio-frequency (RF) signal input end DA16 end of electronic switch MK8, electronic switch MK16 respectively;
2. electronic switch partly contains 16 electronic switches altogether: electronic switch MK1 is to electronic switch MK16.Described electronic switch is by resistance R 01, resistance R 02, resistance R 03, resistance R 04, resistance R 05, resistance R 06, resistance R 07, resistance R 08, capacitor C 01, capacitor C 02, capacitor C 03, capacitor C 04, capacitor C 05, capacitor C 06, capacitor C 07, inductor L01, inductor L02, inductor L03, inductor L04, inductor L05, inductor L06, inductor L07, PIN diode D01, PIN diode D02, PIN diode D03, PIN diode D04, light-emitting diode D05 element constitute; Wherein, capacitor C 01 1 ends and radio-frequency (RF) signal input end DA and resistance R 01 link, and the other end and inductor L01, PIN diode D01 link; The other end connecting resistance R02 of inductor L01, another termination 2.5V reference voltage input of resistance R 02, resistance R 03, resistance R 06, resistance R 07, resistance R 08; The other end of PIN diode D01 and inductor L02, inductor L03, PIN diode D02 link, and the other end of PIN diode D02 and capacitor C 02, resistance R 03 link; The other end ground connection of resistance R 01, resistance R 05, capacitor C 02, capacitor C 04, capacitor C 06, capacitor C 07, inductor L07, light-emitting diode D05, the other end of inductor L02 and resistance R 04, resistance R 05, resistance R 09, capacitor C 06, capacitor C 07, inductor L05 link; The other end of inductor L03 and inductor L04, capacitor C 03 link, the other end connecting resistance R06 of inductor L04, and the other end of capacitor C 03 and inductor L05, PIN diode D03, PIN diode D04 link; The other end of PIN diode D03 and capacitor C 04, resistance R 07 link, the other end of PIN diode D04 and capacitor C 05, inductor L06 link, the other end of inductor L06 and resistance R 08 link, the other end of capacitor C 05 and inductor L07 and radiofrequency signal output D0 link, the other end of resistance R 09 and light-emitting diode D05 link, and the other end of resistance R 04 and signal input end DY link.
In this circuit, capacitor C 01, capacitor C 03, capacitor C 05 are RF-coupled electric capacity, and resistance R 02, resistance R 03, resistance R 06, resistance R 07, resistance R 08 are the biasing resistor of PIN diode PIN diode D01, PIN diode D02, PIN diode D03, PIN diode D04.Capacitor C 02, capacitor C 04, capacitor C 06, capacitor C 07 are the high frequency decoupling capacitor.Inductor L01, inductor L02, inductor L04, inductor L05, inductor L06 provide DC channel for PIN diode PIN diode D01, PIN diode D02, PIN diode D03, PIN diode D04.Lumination of light emitting diode diode D05 is used for the state indication of electronic switch.
Its operation principle is: by the input of radiofrequency signal two distributor B300 in the high temperature shielding conductor is connected to signal distribution module 3 of RF Amplifier Module 1, the output through two distributor B300 is divided into two-way with signal.Each road all has been connected in series 8 one splitters.Wherein, the order of first via splitter serial connection is a splitter B301, a splitter B302, a splitter B303, a splitter B304, a splitter B305, a splitter B306, a splitter B307, a splitter B308.The order of No. the second splitter serial connection is a splitter B309, a splitter B310, a splitter B311, a splitter B312, a splitter B313, a splitter B314, a splitter B315, a splitter B316.By being serially connected in the branch port of each splitter in the circuit, with radiofrequency signal be sent to respectively all electronic switch MK1 to the signal input part radio-frequency (RF) signal input end DA1 of electronic switch MK16 to radio-frequency (RF) signal input end DA16.So just finished the distribution of signal.Here, all high frequency electronic switchs all are the same, and all signals of distributing to high frequency electronic switch all are the same.The control signal of coming by control circuit be sent to respective electronic switch MK1 to the corresponding control end signal input end DY1 of electronic switch MK16 to signal input end DY16.
Deliver to radiofrequency signal on the electronic switch input terminal radio-frequency (RF) signal input end DAn is coupled to PIN diode PIN diode D01 through capacitor C 01 negative pole by the distribution network branch port, if the control signal that is sent by control module 4 that is added on the sub-signal input end DYn of electronic switch controling end is a high level, then PIN diode PIN diode D01, PIN diode D04 positively biased, PIN diode D02, PIN diode D03 are anti-inclined to one side, electronic switch is connected, and radiofrequency signal is sent to lead-out terminal signal input end DYn by input terminal radio-frequency (RF) signal input end DAn; If the control signal that is sent by control module 4 that is added on the sub-signal input end DYn of electronic switch controling end is a low level, then PIN diode PIN diode D01, PIN diode D04 are by partially anti-, PIN diode D02, PIN diode D03 positively biased, radiofrequency signal is blocked, the signal bypass over the ground that PIN diode D02, capacitor C 02, PIN diode D03, capacitor C 03 are come leakage, electronic switch cuts out, and lead-out terminal signal input end DYn does not then have radiofrequency signal output.Even certain road control signal is a high level, and the electronic switch on this road is opened, and the radio television signal of then receiving this road user is switched on; If certain road control signal is a low level, the electronic switch on this road is disconnected, and the radio television signal of then receiving this road user is turned off.So just realized utilizing computer to control opening or turn-offing of each user port radio television signal through transmission network at headend room.
The control of upward signal: the control procedure of upward signal and downstream signal is the same, just signal flow is opposite, incoming level is 103 ± 5dBuV, when subscriber terminal equipment capacitor C aB inductor Le Modem sends signal with the carrier frequency form, the delivery outlet of the user terminal controller by the subscriber box in the user family, distribution system advances.The decay controlled quentity controlled variable is greater than 62dB.Level amplifies through reverse amplification module through behind the core loss again, has compensated branch loss, and the assurance output level is normally exported, and turns back to front end.
Total operation principle is: subscriber control information sends the management control command by front-end control center main control computer, the data encryption modulator carries out digital coding, after modulation is the frequency shift keying modulation through FSK, mix with front end capacitor C A triode TV signal with the radio frequency form, mixed resistance R F signal is delivered to the network end-point terminal control unit by transmission network.The user terminal controller is that collection amplifier, signal distribution network, data demodulator, microprocessor, high frequency electronic switch are the equipment of one.Terminal control unit amplifies and divides two-way to transmit, and one the tunnel arrives high frequency electronic switch behind signal distribution network; Data demodulation unit is delivered on another road behind bandpass filtering, the control command reduction that data demodulation unit is sent the front-end control center here, deliver to executive control operation among the microprocessor capacitor C PU, capacitor C PU carries out address filtering to subscriber control information, receive only/transmit and meet the subscriber control information that local address is a terminal address, the address of terminal control unit is kept in its memory E2p resistance R OM, and according to the User Status situation, terminal control unit is transmitted control information.Behind the microprocessor identifying information, to high frequency electronic switch output corresponding control information, to realize opening or off state to the user port radio television signal.Network manager can be realized the user is carried out State Control and network management by the computer management platform at the front-end control center.
Claims (5)
1, a kind of cable TV bidirectional terminal controller, comprise RF Amplifier Module (1) and power module (5), it is characterized in that: also comprise control module (4), data demodulation module (2) and signal distribution module (3), described power module (5) is connected in RF Amplifier Module (1) and data demodulation module (2), RF Amplifier Module (1) divides two-way, and one the tunnel connects signal distribution module (3); To control module (4), control module (4) connects signal distribution module (3) through data demodulation module (2) on another road.
2, cable TV bidirectional terminal controller as claimed in claim 1, it is characterized in that: comprise ic chip 401, ic chip 402, ic chip 403, ic chip 404 and ic chip 405 in the described control module (4), resistance R 401, resistance R 402, resistance R 403, resistance R 404, crystal oscillator JT401, capacitor C 401, capacitor C 402 and lumination of light emitting diode diode D401; Described resistance R 401 1 end ground connection, the 2nd pin of other end connecting resistance R402 and ic chip 401, another termination 5V power supply of resistance R 402, resistance R 403 1 termination 5V power supplys, the 7th pin of the 1st pin of the other end and ic chip 401, the negative pole of light-emitting diode D401, ic chip 402 links, resistance R 404 1 termination 5V power supplys, the positive pole of other end sending and receiving optical diode D401; 8,9 pin of ic chip 402 and 5,6 pin of ic chip 403 link, corresponding respectively 2,4,6,8,11,13,15,17 pin that are connected to ic chip 404 of 8 pin ones, 0,11,12,13,14,15,16,17 pin of ic chip 402 delivery outlet B, corresponding respectively 2,4,6,8,11,13,15,17 pin that are connected to ic chip 405 of 8 pin ones, 8,19,20,21,22,23,24,25 pin of ic chip 402 delivery outlet capacitor C; 18 of ic chip 404,16,14,12,3,5,7,9 pin, corresponding respectively be connected to electronic switch MK1 in the signal distribution module 3 to the signal input end DY1 of electronic switch MK8 to signal input end DY8 pin, 18 of ic chip 405,16,14,12,3,5,7,9 pin, corresponding respectively be connected to electronic switch MK9 in the signal distribution module 3 to the signal input end DY9 of electronic switch MK16 to signal input end DY16 pin, 3 of ic chip 402,5,6 pin are unsettled, the 26th, 27 pin connect the two ends of 4MHz crystal oscillator JT401, and the two ends of crystal oscillator JT401 also are connected to the capacitor C 201 of ground connection respectively, capacitor C 202.
3, cable TV bidirectional terminal controller as claimed in claim 1 or 2, it is characterized in that: described signal distribution module (3) comprises signal distribution network and electronic switch two parts:
1. signal distribution network is by two distributor B300; One splitter B301, a splitter B302, a splitter B303, a splitter B304, a splitter B305, a splitter B306, a splitter B307, a splitter B308, a splitter B309, a splitter B310, a splitter B311, a splitter B312, a splitter B313, a splitter B314, a splitter B315, a splitter B316; Resistance R 300, resistance R 301, resistance R 302, resistance R 303, resistance R 304, resistance R 305, resistance R 306, resistance R 307, resistance R 308, resistance R 309, resistance R 310, resistance R 311, resistance R 312, resistance R 313, resistance R 314, resistance R 315, resistance R 316, resistance R 317, resistance R 318; Capacitor C 300, capacitor C 301, capacitor C 302, capacitor C 303, capacitor C 304, capacitor C 305, capacitor C 306, capacitor C 307, capacitor C 308, capacitor C 309, capacitor C 310, capacitor C 311, capacitor C 312, capacitor C 313, capacitor C 314, capacitor C 315, capacitor C 316 elements such as grade are formed, wherein the input of two distributor B300 is attached to the output of RF Amplifier Module 1, resistance R 300 is connected in parallel between the input and ground of two distributor B300, two outputs of two distributor B300 respectively with capacitor C 301, the input of one splitter B301 and capacitor C 309, the input of one splitter B309 links, a splitter B301, the output of one splitter B309 respectively with capacitor C 302, the input of one splitter B302 and capacitor C 310, the input of one splitter B310 links; The branch end of one splitter B301, a splitter B309 is Yi Bian respectively by resistance R 301, resistance R 309 ground connection, the other end links with radio-frequency (RF) signal input end DA1, the radio-frequency (RF) signal input end DA9 end of electronic switch MK1, electronic switch MK9 respectively; One splitter B302, the output of one splitter B310 respectively with capacitor C 303, the input of one splitter B303 and capacitor C 311, the input of one splitter B311 links, one splitter B302, the branch end of one splitter B310, on one side respectively by resistance R 302, resistance R 310 ground connection, the other end respectively with electronic switch MK2, the radio-frequency (RF) signal input end DA2 of electronic switch MK10, radio-frequency (RF) signal input end DA10 end links a splitter B303, the output of one splitter B311 respectively with capacitor C 304, the input of one splitter B304 and capacitor C 312, the input of one splitter B312 links; The branch end of one splitter B303, a splitter B311 is Yi Bian respectively by resistance R 303, resistance R 311 ground connection, the other end links with radio-frequency (RF) signal input end DA3, the radio-frequency (RF) signal input end DA11 end of electronic switch MK3, electronic switch MK11 respectively; The output of one splitter B304, a splitter B312 links with the input of the input of capacitor C 305, a splitter B305 and capacitor C 313, a splitter B313 respectively, the branch end of one splitter B304, a splitter B312, on one side respectively by resistance R 304, resistance R 312 ground connection, the other end links with radio-frequency (RF) signal input end DA4, the radio-frequency (RF) signal input end DA12 end of electronic switch MK4, electronic switch MK12 respectively; The output of one splitter B305, a splitter B313 links with the input of the input of capacitor C 306, a splitter B306 and capacitor C 314, a splitter B314 respectively, the branch end of one splitter B305, a splitter B313, on one side respectively by resistance R 305, resistance R 313 ground connection, the other end links with radio-frequency (RF) signal input end DA5, the radio-frequency (RF) signal input end DA13 end of electronic switch MK5, electronic switch MK13 respectively; The output of one splitter B306, a splitter B314 links with the input of the input of capacitor C 307, a splitter B307 and capacitor C 315, a splitter B315 respectively, the branch end of one splitter B306, a splitter B314, on one side respectively by resistance R 306, resistance R 314 ground connection, the other end links with radio-frequency (RF) signal input end DA6, the radio-frequency (RF) signal input end DA14 end of electronic switch MK6, electronic switch MK14 respectively; The output of one splitter B307, a splitter B315 links with the input of the input of capacitor C 308, a splitter B308 and capacitor C 316, a splitter B316 respectively, the branch end of one splitter B307, a splitter B315, on one side respectively by resistance R 307, resistance R 315 ground connection, the other end links with radio-frequency (RF) signal input end DA7, the radio-frequency (RF) signal input end DA15 end of electronic switch MK7, electronic switch MK15 respectively; The output of one splitter B308, a splitter B316 is respectively by resistance R 317, resistance R 318 ground connection; The branch end of one splitter B308, a splitter B316 is Yi Bian respectively by resistance R 308, resistance R 316 ground connection, the other end links with radio-frequency (RF) signal input end DA8, the radio-frequency (RF) signal input end DA16 end of electronic switch MK8, electronic switch MK16 respectively; 2. electronic switch partly contains 16 electronic switches altogether.
4, cable TV bidirectional terminal controller as claimed in claim 3, it is characterized in that: described electronic switch is by resistance R 01, resistance R 02, resistance R 03, resistance R 04, resistance R 05, resistance R 06, resistance R 07, resistance R 08, capacitor C 01, capacitor C 02, capacitor C 03, capacitor C 04, capacitor C 05, capacitor C 06, capacitor C 07, inductor L01, inductor L02, inductor L03, inductor L04, inductor L05, inductor L06, inductor L07, PIN diode D01, PIN diode D02, PIN diode D03, PIN diode D04, light-emitting diode D05 element constitutes; Wherein, capacitor C 01 1 ends and radio-frequency (RF) signal input end DA and resistance R 01 link, and the other end and inductor L01, PIN diode D01 link; The other end connecting resistance R02 of inductor L01, another termination 2.5V reference voltage input of resistance R 02, resistance R 03, resistance R 06, resistance R 07, resistance R 08; The other end of PIN diode D01 and inductor L02, inductor L03, PIN diode D02 link, and the other end of PIN diode D02 and capacitor C 02, resistance R 03 link; The other end ground connection of resistance R 01, resistance R 05, capacitor C 02, capacitor C 04, capacitor C 06, capacitor C 07, inductor L07, light-emitting diode D05, the other end of inductor L02 and resistance R 04, resistance R 05, resistance R 09, capacitor C 06, capacitor C 07, inductor L05 link; The other end of inductor L03 and inductor L04, capacitor C 03 link, the other end connecting resistance R06 of inductor L04, and the other end of capacitor C 03 and inductor L05, PIN diode D03, PIN diode D04 link; The other end of PIN diode D03 and capacitor C 04, resistance R 07 link, the other end of PIN diode D04 and capacitor C 05, inductor L06 link, the other end of inductor L06 and resistance R 08 link, the other end of capacitor C 05 and inductor L07 and radiofrequency signal output D0 link, the other end of resistance R 09 and light-emitting diode D05 link, and the other end of resistance R 04 and signal input end DY link.
5, cable TV bidirectional terminal controller as claimed in claim 4, it is characterized in that: described data demodulation module comprises resistance R 201 in (2), resistance R 202, resistance R 203, resistance R 204, resistance R 205, resistance R 206, resistance R 207, resistance R 208, resistance R 209, resistance R 210, resistance R 211, resistance R 212, resistance R 213, resistance R 214, resistance R 215, resistance R 216 and resistance R 217, capacitor C 201, capacitor C 202, capacitor C 203, capacitor C 204, capacitor C 205, capacitor C 206, capacitor C 207, capacitor C 208, capacitor C 209, capacitor C 210 and capacitor C 211, crystal oscillator JT201, triode T201, inductor L201, data demodulates chip IC 201, filter F501, filter F502; Described resistance R 201 1 ends and RF Amplifier Module (1), resistance R 202 link other end ground connection; The input of the other end of resistance R 202 and filter F501 links; The output of filter F501 is connected to 20 pin of data demodulates chip IC 201 by capacitor C 201; Crystal oscillator JT201 one end and capacitor C 202, capacitor C 203 link, and the other end is connected to the 2nd pin of data demodulates chip IC 201, connect 17 pin of data demodulates chip IC 201 by resistance R 203 at the earth terminal of capacitor C 203; The end of the other end of the other end of capacitor C 202 and capacitor C 202 and inductor L201 and the 3rd pin of data demodulates chip IC 201 link, and the other end of inductor L201 connects the 12V voltage input end by resistance R 217; The 7th pin of the end of filter F502 and resistance R 212, data demodulates chip IC 201 links, and the 5th pin of the other end and resistance R 213, data demodulates chip IC 201 links; The 18th pin of the base stage of triode T201 and resistance R 214, resistance R 215, resistance R 210 and data demodulates chip IC 201 links; Grounded emitter, the 3rd pin of collector electrode and resistance R 216 and the interior ic chip 401 of control module (4) links; Between 17 pin of data demodulates chip IC 201 and triode T201 base stage, be connected to resistance R 210, be connected to resistance R 211 between 16 pin of data demodulates chip IC 201 and 13 pin; Connect between 14 pin of data demodulates chip IC 201 and 15 pin, resistance R 207, resistance R 209, the capacitor C 207 of branch's termination ground connection of 14 pin of data demodulates chip IC 201, in the indirect earthed resistance R 208 of resistance R 207 and resistance R 209, the 7th pin of data demodulates chip IC 201 connects with an end of resistance R 212, the other end of resistance R 212 by inductor L202 connect data demodulates chip IC 201 11 pin, by capacitor C 208 connect data demodulates chip IC 201 the 8th pin, connect the 9th pin of data demodulates chip IC 201, be parallel with capacitor C 211 on the inductor L202; 9 pin and 10 pin of data demodulates chip IC 201 link, and the 3rd pin of data demodulates chip IC 201 is connected to the contact of inductor L201 and capacitor C 202; The capacitor C 209 of ground connection and the capacitor C 210 of ground connection are connected between capacitor C 208 and the resistance R 212, another termination 5V voltage input end of inductor L202, and this voltage input end connects 17 pin of data demodulates chip IC 201 by inductor L203, resistance R 204; Between the contact of resistance R 204 and inductor L203 and inductor L201 and the capacitor C 204 and the capacitor C 205 that are connected with ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03218893 CN2631159Y (en) | 2003-05-15 | 2003-05-15 | Cable television two-way terminal controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03218893 CN2631159Y (en) | 2003-05-15 | 2003-05-15 | Cable television two-way terminal controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2631159Y true CN2631159Y (en) | 2004-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03218893 Expired - Fee Related CN2631159Y (en) | 2003-05-15 | 2003-05-15 | Cable television two-way terminal controller |
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| CN (1) | CN2631159Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2448414C2 (en) * | 2007-02-28 | 2012-04-20 | Недерландсе Органисати Вор Тугепаст-Натюрветенсхаппелейк Ондерзук Тно | Signal quality determination in cable networks |
| CN102437882A (en) * | 2011-10-26 | 2012-05-02 | 常熟市高事达光电科技有限公司 | Singlechip control equalization circuit for optical receiver of cable television network |
-
2003
- 2003-05-15 CN CN 03218893 patent/CN2631159Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2448414C2 (en) * | 2007-02-28 | 2012-04-20 | Недерландсе Органисати Вор Тугепаст-Натюрветенсхаппелейк Ондерзук Тно | Signal quality determination in cable networks |
| US8467307B2 (en) | 2007-02-28 | 2013-06-18 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Signal quality determination in cable networks |
| CN102437882A (en) * | 2011-10-26 | 2012-05-02 | 常熟市高事达光电科技有限公司 | Singlechip control equalization circuit for optical receiver of cable television network |
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