CN201733393U - Bidirectional amplifier for alteration of cable television Ethernet coaxial cable transmission networks - Google Patents

Bidirectional amplifier for alteration of cable television Ethernet coaxial cable transmission networks Download PDF

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Publication number
CN201733393U
CN201733393U CN2010201615373U CN201020161537U CN201733393U CN 201733393 U CN201733393 U CN 201733393U CN 2010201615373 U CN2010201615373 U CN 2010201615373U CN 201020161537 U CN201020161537 U CN 201020161537U CN 201733393 U CN201733393 U CN 201733393U
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inductance
capacitor
wiring port
resistance
electric capacity
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章冠华
陆炯
陈鑫
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CHANGSHU GAOSHIDA OPTOELECTRONIC TECHNOLOGY Co Ltd
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CHANGSHU GAOSHIDA OPTOELECTRONIC TECHNOLOGY Co Ltd
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Abstract

The utility model relates to a bidirectional amplifier for the alteration of cable television Ethernet coaxial cable transmission networks, which belongs to the technical field of cable television. The bidirectional amplifier comprises a cable television radio frequency signal amplification circuit, an Ethernet coaxial cable transmission signal circuit, a cabling port anti-surge anti-lightning protection and overvoltage circuit and a power supply circuit, the cable television radio frequency signal amplification circuit is connected with the Ethernet coaxial cable transmission signal circuit, the cabling port anti-surge anti-lightning protection and overvoltage circuit and the power supply circuit, and the Ethernet coaxial cable transmission signal circuit is connected with the cabling port anti-surge anti-lightning protection and overvoltage circuit. The utility model has the advantages that: the utility model is characterized by quick and wide coverage and low cost; according to practical circumstance, installation is only carried in areas in need, while devices do not need to be deployed in place once for all; subscriber devices can be gradually put into use as the number of subscribers is increased, installation and investment can be carried out according to need, and capital recovery is highly predictable.

Description

Be used for the two-way amplifier that cable TV ethernet coaxial cable transmission network is transformed
Technical field
The utility model relates to a kind of cable TV EOC (Ethernet Over Coax that is used for, the ethernet coaxial cable transmission) two-way amplifier of the network rebuilding, belong to the cable TV technical field, especially the transformation of hybrid fiber coax bilateral network is a kind of based on cable TV transmitted in both directions equipment.
Background technology
Cable TV (CATV, Cable Television) has arrived the critical stage of development at present through the development of decades, and along with the development of business, digitlization, fiberize and transmitted in both directions technology etc. progressively incorporate in the cable television network.For better development, increase new service function, pursue new growth engines, thereby more and more higher to the requirement of transmission network, the transformation of network is extremely urgent.In this case, hybrid fiber coax (HFC, Hybrid FiberCoax) as a kind of broadband access network, more and more demonstrates its distinctive advantage: extremely wide transmission band, abundant frequency resource, insert means and relatively low technical cost easily.Therefore, develop the integral telecommunication business by cable TV, promptly cable TV network is except transmitting TV programme, and also possessing functions such as online, data transmission, video request program, household's IT application is the development trend of cable TV network.
Hfc plant bidirectional rebuilding both at home and abroad is in the past mainly based on North America cable TV modulator-demodulator product standard (DOCSIS), be that cable modem terminal system (CMTS is set on the basis of hfc plant system configuration, Cable Modem TerminationSystem), (CM, CableModem) equipment such as bi-directional light work station and two-way amplifier are implemented in transmission CATV signal and data communication service in the hfc plant for upconverter, Operation ﹠ Maintenance System server (Oss Server) and cable modem.But this technology is except that the higher share of the more sparse North America DOCSIS standard access way occupation ratio of population distribution, in the Asia and other people are mouthful than the area of comparatively dense, the number of users of DOCSIS standard relatively seldom, this enforcement in several years of domestic radio and TV operator is indicating that also the DOCSIS standard is difficult to become the bidirectional rebuilding technology of main flow in China.Wherein:
CMTS: the data that are hfc plant insert local side apparatus, are the connection devices that data are transmitted in hfc plant, are mainly used in and finish forwarding of data in the data communication network, protocol processes and rf modulations demodulation function;
Upconverter: being arranged in CMTS, is the frequency conversion device of hfc plant, and the descending analog intermediate frequency signal that is mainly used in CMTS output is converted on arbitrary television channel of CATV;
Bi-directional light work station: be the hfc plant optical node device, finish mainly that the cable TV downlink optical signal is converted to the signal of telecommunication after amplification module amplifies the output signal of telecommunication to cable system, the cable TV uplink electrical signals is converted to light signal by reverse passback light emission module and passes through Optical Fiber Transmission and return headend room after amplification module amplifies;
Two-way amplifier: be hfc plant cable system intermediate equipment, mainly finish the uplink and downlink signal and amplify the back output signal with amplification module;
Oss Server: be whole system and Network Management equipment, be used to provide system's operation required various service supports, as DHCP, TFTP, TOD, LOG service function etc. are provided for system;
CM: be connected with user terminal with hfc plant, be mainly used in data forwarding, protocol processes and the modulation function etc. finished between hfc plant and the user terminal.
But the CMTS technology can only be carried out data communication service in the hfc plant system, can not realize common telephone service etc., exists not enough on multi-service realizes.Simultaneously, use the CMTS technology in the hfc plant system, to carry out data communication service, except that exist noise collection effect, bandwidth low, do not meet the IPization trend, be not easy to some technical problem such as upgrade expanding, mainly also need optical receiver and amplifier are carried out bidirectional rebuilding (increasing back emitted module, reverse amplification module), also need add equipment such as backlight receiver and upconverter.
Summary of the invention
The purpose of this utility model is that a kind of two-way amplifier that cable TV ethernet coaxial cable transmission network is transformed that is used for will be provided, and the bandwidth height that it provides, backward channel do not need amplification module just can realize transmitted in both directions, and price is low.Can make full use of simultaneously coaxial cable, branch distributor resource on the existing network, the construction of need not registering one's residence, construction volume significantly reduces, and transformation speed is fast.Have fast wide the covering and characteristics cheaply, make full use of the legacy network resource, the current network of need not upgrading can cover the user in whole sub-district or building as long as single-point is just installed.
The purpose of this utility model reaches like this; a kind of two-way amplifier that is used for the transformation of cable TV ethernet coaxial cable transmission network; comprise wired TV RF signals amplifying circuit; ethernet coaxial cable transmission signals circuit; Wiring port is prevented the anti-lightning strike protection of surge and is crossed circuit and power circuit; cable TV rf signal amplification circuit and ethernet coaxial cable transmission signals circuit; the anti-anti-lightning strike protection of surge of Wiring port with cross circuit and be connected with power circuit, ethernet coaxial cable transmission signals circuit prevents that with Wiring port the anti-lightning strike protection of surge is connected with the mistake circuit.
Cable TV rf signal amplification circuit described in the utility model comprises Wiring port RF/IN, OUT1, OUT2, IN/-20dB, OUT1﹠amp; 2/TEST, inductance L 1, L2, L3,2L1, capacitor C 1, C2, C3, C4, C5, C6, C7,2C1, coupling coil Z1, Z2, resistance R 1, R2, R3, R4, R5, R6, R7, R8, R9,2R1, amplification module A1, equalizer EQ, attenuator ATT, duplexer filter FLT1, FLT2 and finger assignments plug-in unit FZ/FP, Wiring port RF/IN is connected with an end of inductance L 1, the other end of inductance L 1 is connected with an end of capacitor C 1, the other end of capacitor C 1 is connected with coupling coil Z1 primary input, coupling coil Z1 impedance matching end is connected with an end of resistance R 4, coupling coil Z1 branch end and resistance R 2, the end of R3 connects, the other end of resistance R 2 is connected with an end of resistance R 1 and capacitor C 7, the other end of capacitor C 7 is connected with Wiring port IN/-20dB, coupling coil Z1 master output mixes end with duplexer filter FLT1 and is connected, the high go side of duplexer filter FLT1 is connected with the end of equalizer EQ, the other end of equalizer EQ is connected with the end of attenuator ATT, the other end of attenuator ATT is connected with an end of resistance R 5, the other end of resistance R 5 and capacitor C 2, the end of resistance 2R1 connects, the other end of resistance 2R1 is connected with the end of electric capacity 2C1, the other end of electric capacity 2C1 is connected with the end of inductance 2L1, the other end of capacitor C 2 is connected with 1 pin of amplification module A1,9 pin of amplification module A1 are connected with an end of capacitor C 3, the other end of capacitor C 3 is connected with the high go side of duplexer filter FLT2, duplexer filter FLT2 mixes end and is connected with finger assignments plug-in unit FZ/FP input, finger assignments plug-in unit FZ/FP one output is connected with coupling coil Z2 primary input, coupling coil Z2 impedance matching end is connected with an end of resistance R 6, coupling coil Z2 branch end and resistance R 7, the end of R8 connects, the other end of resistance R 8 and resistance R 9, one end of capacitor C 6 connects, the other end of capacitor C 6 and Wiring port OUT1﹠amp; 2/TEST connects, coupling coil Z2 master output is connected with an end of capacitor C 4, the other end of capacitor C 4 is connected with an end of inductance L 2, the other end of inductance L 2 is connected with Wiring port OUT1, another output of finger assignments plug-in unit FZ/FP is connected with an end of capacitor C 5, the other end of capacitor C 5 is connected with an end of inductance L 3, the other end of inductance L 3 is connected with Wiring port OUT2, resistance R 1, R3, R4, R6, R7, the other end of R9, the other end of inductance 2L1, coupling coil Z1,2 of the earth terminal of Z2 and amplification module A1,3,6,7 pin, the earth terminal common ground of attenuator ATT.
Ethernet coaxial cable transmission signals circuit described in the utility model comprises Wiring port RF/IN, OUT1, OUT2, inductance L 1, L2, L3, capacitor C 1, C4, C5, coupling coil Z1, Z2, duplexer filter FLT1, FLT2 and finger assignments plug-in unit FZ/FP, Wiring port RF/IN is connected with an end of inductance L 1, the other end of inductance L 1 is connected with an end of capacitor C 1, the other end of capacitor C 1 is connected with coupling coil Z1 primary input, coupling coil Z1 master output mixes end with duplexer filter FLT1 and is connected, the low go side of duplexer filter FLT1 is connected with the low go side of duplexer filter FLT2, duplexer filter FLT2 mixes end and is connected with finger assignments plug-in unit FZ/FP input, finger assignments plug-in unit FZ/FP one output is connected with coupling coil Z2 primary input, coupling coil Z2 master output is connected with an end of capacitor C 4, the other end of capacitor C 4 is connected with an end of inductance L 2, the other end of inductance L 2 is connected with Wiring port OUT1, another output of finger assignments plug-in unit FZ/FP is connected with an end of capacitor C 5, the other end of capacitor C 5 is connected with an end of inductance L 3, and the other end of inductance L 3 is connected with Wiring port OUT2.
Wiring port described in the utility model is prevented the anti-lightning strike protection of surge and crosses circuit comprising Wiring port RF/IN; OUT1; OUT2; AC60V/IN; inductance 1L1; 1L2; 1L3; discharge tube V1; V2; V3; cross electric mortiser sheet CP1; CP2; CP3 and electric capacity 1C1; 1C2; 1C3; 1C4; 1C5; 1C6; 1C7; 1C8; 1C9; 1C10; 1C11; Wiring port RF/IN is connected with the end of discharge tube V1 and inductance 1L1; the other end of inductance 1L1 is connected with an end of crossing electric mortiser sheet CP1 with electric capacity 1C1; cross the other end and the electric capacity 1C2 of electric mortiser sheet CP1; 1C3; 1C5; 1C6; 1C7; 1C9; 1C10; 1C11; cross electric mortiser sheet CP2; the end of CP3 is connected with Wiring port AC60V/IN; the other end of crossing electric mortiser sheet CP2 is connected with the end of inductance 1L2 and electric capacity 1C4; the other end of inductance 1L2 is connected with Wiring port OUT1 with the end of discharge tube V2; the other end of crossing electric mortiser sheet CP3 is connected with the end of electric capacity 1C8 and inductance 1L3; the other end of inductance 1L3 is connected discharge tube V1 with the end of discharge tube V3 with Wiring port OUT2; V2; V3; electric capacity 1C1; 1C2; 1C3; 1C4; 1C5; 1C6; 1C7; 1C8; 1C9; 1C10; the other end common ground of 1C11.
Power circuit described in the utility model comprises fuse FUSE1, FUSE2, inductance 3L1, light-emitting diode D1, resistance 3R1, electric capacity 3C1,3C2,3C3,3C4,3C5,3C6,3C7,3C8,3C9,3C10, diode D2, D3, D4, D5, D6, three-terminal regulator block LV-7824, K switch 1 and transformer E, the end of fuse FUSE2 is connected with the AC60V input, the other end of fuse FUSE2 is connected with the stiff end of K switch 1, two moved ends of K switch 1 respectively with the 60V of transformer E, 50V holds connection, the output of transformer E and electric capacity 3C7, the end of 3C8, the negative pole of diode D2, the positive pole of D3 connects, another output of transformer E and electric capacity 3C9, the end of 3C10, the positive pole of diode D4, the negative pole of D5 connects, diode D3, D4, the negative pole of D6, electric capacity 3C8, the other end of 3C9, the end of electric capacity 3C6 is connected with the input of three-terminal regulator block LV-7824, the positive pole of diode D6, the output of three-terminal regulator block LV-7824, electric capacity 3C5,3C4, the end of 3C3 is connected with the end of fuse FUSE1, the other end of fuse FUSE1 and resistance 3R1, electric capacity 3C2, the end of inductance 3L1 connects, the other end of resistance 3R1 is connected with the positive pole of light-emitting diode D1, the end of the other end of inductance 3L1 and electric capacity 3C1 is connected electric capacity 3C1 with 5 pin of amplification module A1,3C2,3C3,3C4,3C5,3C6,3C7, the other end of 3C10, diode D2, the anode of D5, the negative electrode of light-emitting diode D1, the earth terminal common ground of the earth terminal of transformer E and three-terminal regulator block LV-7824.
Cable TV EOC (the Ethernet Over Coax that is used for of the present utility model, ethernet coaxial cable transmission) two-way amplifier of the network rebuilding mixes the back to Data Base band signal and CATV signal realize transmitted in both directions on the coaxial cable of cable TV HFC net, is transformed into two-way a, broadband, the digitized novel access network that can adapt to multimedia service on the catv network with the One-to-All Broadcast formula.This equipment has fast wide the covering and characteristics cheaply, makes full use of the legacy network resource, and the current network of need not upgrading can cover the user in whole sub-district or building as long as single-point is just installed.According to actual conditions, only the area that demand is arranged is installed, do not need disposable deployed with devices to be put in place, each household networking cost is equivalent to about 50% of present telecommunications ADSL broadband, and bandwidth is 10 times of ADSL, is enough to satisfy the business demand of following several years.Ustomer premises access equipment can roll and drops into along with user's increase, can install as required, invest, and recovery of the capital has very strong predictable.
Description of drawings
Fig. 1 is a theory diagram of the present utility model.
Fig. 2 is an electrical schematic diagram of the present utility model.
Embodiment
Referring to Fig. 1: be used for the two-way amplifier that cable TV ethernet coaxial cable transmission network is transformed; comprise wired TV RF signals amplifying circuit, ethernet coaxial cable transmission signals circuit, the anti-anti-lightning strike protection of surge of Wiring port and cross circuit and power circuit; the cable TV rf signal amplification circuit is connected with power circuit; cable TV rf signal amplification circuit and ethernet coaxial cable transmission signals circuit, the anti-anti-lightning strike protection of surge of Wiring port and cross circuit and is connected, the anti-anti-lightning strike protection of surge of Wiring port is connected with the mistake circuit.
Referring to Fig. 2: the cable TV rf signal amplification circuit is adjusted signal according to the cable TV signal designing requirement of hybrid fiber coax by duplexer filter high pass, equalizer and attenuator, export to the amplifying circuit module, amplification module outputs to hybrid fiber coax through the duplexer filter high pass after cable TV signal is amplified.The cable TV radiofrequency signal is connected with Wiring port RF/IN by cable, and signal is input to 1 pin (2,3,6, the 7 pin ground connection of A1) of amplification module A1 by inductance L 1, capacitor C 1, coupling coil Z1 input, Z1 master's output, duplexer filter FLT1 mixing end, the high go side of FLT1, equalizer EQ, attenuator ATT, resistance R 5, capacitor C 2.Signal is exported by 9 pin after amplification module A1 amplifies, by capacitor C 3, the high go side of duplexer filter FLT2, finger assignments plug-in unit FZ/FP input, FZ/FP one output is through coupling coil Z2 input, Z2 master's output, capacitor C 4, inductance L 2, Wiring port OUT1, Wiring port OUT1 stube cable output cable TV radiofrequency signal, another output of finger assignments plug-in unit FZ/FP is through capacitor C 5, inductance L 3, Wiring port OUT2, and Wiring port OUT2 stube cable is exported the cable TV radiofrequency signal.The grounding leg ground connection of coupling coil Z1, the end of impedance matching terminating resistor R4, the other end ground connection of resistance R 4, the end of branch end connecting resistance R3, R2, the other end ground connection of resistance R 3, the other end connecting resistance R1 of resistance R 2, an end of capacitor C 7, the other end ground connection of resistance R 1, another termination Wiring port IN/-20dB of capacitor C 7.The grounding leg ground connection of coupling coil Z2, the end of impedance matching terminating resistor R6, the other end ground connection of resistance R 6, the end of branch end connecting resistance R7, R8, the other end ground connection of resistance R 7, the other end connecting resistance R9 of resistance R 8, an end of capacitor C 6, resistance R 9 other end ground connection, another termination Wiring port OUT1﹠amp of capacitor C 6; 2/TEST, the end of a terminating resistor 2R1 of resistance R 5, capacitor C 2, the end of another termination inductance 2L1 of the end of another termination capacitor 2C1 of resistance 2R1, electric capacity 2C1, the other end ground connection of inductance 2L1.Wiring port RF/IN, OUT1, OUT2, inductance L 1, L2, L3, capacitor C 1, C5, coupling coil Z1, Z2, finger assignments plug-in unit F2/FP, duplexer filter FLT1, FLT2 are connected with ethernet coaxial cable transmission signals circuit; Wiring port RF/IN, OUT1, OUT2 are connected with the mistake circuit with the anti-anti-lightning strike protection of surge of Wiring port, and 5 pin of amplification module AT are connected with power circuit.Wherein C1, C4, C5 are high pressure resistant high frequency capacitance, C2, C3, C6, C7 are every straight high frequency capacitance, L1, L2, L3 are the high frequency air core inductor, Z1, Z2 are the high-frequency signal coupling coil, R5 is the circuit impedance build-out resistor, and FLT1, FLT2 are duplexer filter, and FZ/FP is the finger assignments plug-in unit, RF/IN, OUT1, OUT2 are the cable connection port, IN/-20dB, OUT1﹠amp; 2/TEST is the RF signal monitoring mouth, A1 is the grace intelligence Pu BGY835C of a company RF Amplifier Module, C3 is the high frequency capacitance, EQ is for adjusting input cable TV signal of telecommunication gradient equalizer, ATT is for adjusting input cable TV electrical signal intensity attenuator, R4, R6 are signal coupling coil impedance matching resistance, R1, R2, R3, R7, R8, R9 are signal attenuation resistance, 2R1 regulates resistance for the signal flatness, 2C1 regulates high frequency capacitance for the signal flatness, and 2L1 regulates the high frequency air core inductor for the signal flatness.
Ethernet coaxial cable transmission signals circuit, the ethernet coaxial cable transmission signals outputs to hybrid fiber coax to ethernet coaxial cable through the duplexer filter low pass then through the input of duplexer filter low pass.The ethernet coaxial cable transmission signals is connected with RF/IN by cable, signal is by inductance L 1, capacitor C 1, coupling coil Z1 input, Z1 master's output, duplexer filter FLT1 mixes end, FLT1 hangs down the go side, FLT2 hangs down the go side, duplexer filter FLT2 mixes end, finger assignments plug-in unit FZ/FP input, finger assignments plug-in unit FZ/FP one output is through coupling coil Z2 input, Z2 master's output, capacitor C 4, inductance L 2, Wiring port OUT1, Wiring port OUT1 stube cable output ethernet coaxial cable transmission signals, another output of finger assignments plug-in unit FZ/FP is through capacitor C 5, inductance L 3, Wiring port OUT2, Wiring port OUT2 stube cable output ethernet coaxial cable transmission signals.Wiring port RF/IN, OUT1, OUT2 are connected with the mistake circuit with the anti-anti-lightning strike protection of surge of Wiring port.Wherein C1, C4, C5 are high pressure resistant high frequency capacitance, and L1, L2, L3 are the high frequency air core inductor, and Z1, Z2 are the high-frequency signal coupling coil, and FLT1, FLT2 are duplexer filter, and FZ/FP is the finger assignments plug-in unit, and RF/IN, OUT1, OUT2 are the cable connection port.
Wiring port is prevented the anti-lightning strike protection of surge and is crossed circuit; AC60V input port, signal input port and signal output port design have the anti-lightning strike protection of anti-surge and cross circuit, and electric designing requirement selects the corresponding electric mortiser sheet of crossing to carry out electrical transmission according to the mistake of hybrid fiber coax.Wiring port RF/IN, discharge tube V1, inductance 1L1, electric capacity 1C1, Wiring port OUT1, discharge tube V2, inductance 1L2, electric capacity 1C4, Wiring port OUT2, discharge tube V3, inductance 1L3, electric capacity 1C8 form the anti-anti-lightning strike protection of surge of port and cross circuit.Wiring port AC60V/IN, electric capacity 1C11, cross electric mortiser sheet CP1, electric capacity 1C2,1C3, cross electric mortiser sheet CP2, electric capacity 1C5,1C6,1C7, cross electric mortiser sheet CP2, electric capacity 1C9,1C10 form independently-powered circuit, electric designing requirement is selected the corresponding CP1 of electric mortiser sheet excessively, CP2, CP3 to power and is crossed electrical transmission according to the mistake of hybrid fiber coax, also can select AC60V/IN to carry out power supplied locally.Wherein RF/IN, OUT1, OUT2 are the cable connection port; AC60V/IN is local independently-powered Wiring port; 1L1,1L2,1L3 are for exchanging the overcurrent inductance; V1, V2, V3 are the anti-anti-lightning strike protection discharge tube of surge; electric capacity 1C1,1C2,1C3,1C4,1C5,1C6,1C7,1C8,1C9,1C10,1C11 are high pressure resistant high-frequency filter capacitor, and CP1, CP2, CP3 are for exchanging the overcurrent inserted sheet.
Power circuit, used AC60V voltage electric switch to select suitable voltage to be input to transformer E according to the circuit virtual voltage, the voltage of transformer E output outputs to three-terminal regulator block through bridge rectifier and filter circuit, and the constant direct current 24V voltage of three-terminal regulator block output wave circuit and dc inductance is after filtration powered to amplification module.AC60V is input to fuse FUSE2, K switch 1, transformer E, passes through the negative pole link that the bridge rectifier of being made up of diode D2, D3, D4, D5, electric capacity 3C7,3C8,3C9,3C10 outputs to electric capacity 3C6, three-terminal regulator block LV-7824 input, diode D6, and three-terminal regulator block LV-7824 output direct current 24V voltage is imported 5 pin of amplification module A1 through positive pole, electric capacity 3C5,3C4,3C3, fuse FUSE1, electric capacity 3C2, inductance 3L1, the electric capacity 3C1 of diode D6.Wherein FUSE1, FUSE2 are the Fuse Type fuse; K1 is a voltage-selected switch; E is a transformer, and D1 is a red light emitting diodes, and D2, D3, D4, D5 are rectifier diode; D6 is the overvoltage protection diode; LV-7824 is a three-terminal regulator block, and 3C1,3C2,3C4,3C5,3C7,3C8,3C9,3C10 are high-frequency filter capacitor, and 3C3,3C6 are alminium electrolytic condenser; 3L1 is a direct current overcurrent inductance, and A1 is the grace intelligence Pu BGY835C of a company amplification module.
IPization is the general trend of information network development.The transmission of a new generation's encoding and decoding technique all is based on the IP form, so the necessary IPization of front end, and front end IPization must drive the IPization of transmission network.The utility model is about to the two-way net equipment of a cable TV of issue " two-wayization of cable television network transformation instruction " up-to-date development according to SARFT(The State Administration of Radio and Television); its inner integrated cable TV rf signal amplification circuit; ethernet coaxial cable transmission signals circuit; Wiring port is prevented surge; anti-lightning strike protection box is crossed current circuit; power circuit; be ethernet passive optical network (EPON; Ethernet PassiveOptical Network) 1 product of the two-way net transformation of technology; it is except there being the solution noise collection effect; very high bandwidth is provided; meet the IPization trend; be convenient to upgrade expanding; fail safe; the reliability height; maintainability waits outside some technical advantage well; mainly be that amplifier oppositely partly need not design amplification module; cost reduces significantly; can make full use of the coaxial cable on the existing network; the branch distributor resource; the construction of need not registering one's residence; construction volume significantly reduces, and transformation speed is fast.

Claims (5)

1. one kind is used for the two-way amplifier that cable TV ethernet coaxial cable transmission network is transformed; it is characterized in that comprising wired TV RF signals amplifying circuit, ethernet coaxial cable transmission signals circuit, the anti-anti-lightning strike protection of surge of Wiring port and cross circuit and power circuit; cable TV rf signal amplification circuit and ethernet coaxial cable transmission signals circuit, the anti-anti-lightning strike protection of surge of Wiring port and cross circuit and is connected with power circuit, ethernet coaxial cable transmission signals circuit prevents that with Wiring port the anti-lightning strike protection of surge is connected with the mistake circuit.
2. the two-way amplifier that is used for the transformation of cable TV ethernet coaxial cable transmission network according to claim 1 is characterized in that described cable TV rf signal amplification circuit comprises Wiring port RF/IN, OUT1, OUT2, IN/-20dB, OUT1﹠amp; 2/TEST, inductance L 1, L2, L3,2L1, capacitor C 1, C2, C3, C4, C5, C6, C7,2C1, coupling coil Z1, Z2, resistance R 1, R2, R3, R4, R5, R6, R7, R8, R9,2R1, amplification module A1, equalizer EQ, attenuator ATT, duplexer filter FLT1, FLT2 and finger assignments plug-in unit FZ/FP, Wiring port RF/IN is connected with an end of inductance L 1, the other end of inductance L 1 is connected with an end of capacitor C 1, the other end of capacitor C 1 is connected with coupling coil Z1 primary input, coupling coil Z1 impedance matching end is connected with an end of resistance R 4, coupling coil Z1 branch end and resistance R 2, the end of R3 connects, the other end of resistance R 2 is connected with an end of resistance R 1 and capacitor C 7, the other end of capacitor C 7 is connected with Wiring port IN/-20dB, coupling coil Z1 master output mixes end with duplexer filter FLT1 and is connected, the high go side of duplexer filter FLT1 is connected with the end of equalizer EQ, the other end of equalizer EQ is connected with the end of attenuator ATT, the other end of attenuator ATT is connected with an end of resistance R 5, the other end of resistance R 5 and capacitor C 2, the end of resistance 2R1 connects, the other end of resistance 2R1 is connected with the end of electric capacity 2C1, the other end of electric capacity 2C1 is connected with the end of inductance 2L1, the other end of capacitor C 2 is connected with 1 pin of amplification module A1,9 pin of amplification module A1 are connected with an end of capacitor C 3, the other end of capacitor C 3 is connected with the high go side of duplexer filter FLT2, duplexer filter FLT2 mixes end and is connected with finger assignments plug-in unit FZ/FP input, finger assignments plug-in unit FZ/FP one output is connected with coupling coil Z2 primary input, coupling coil Z2 impedance matching end is connected with an end of resistance R 6, coupling coil Z2 branch end and resistance R 7, the end of R8 connects, the other end of resistance R 8 and resistance R 9, one end of capacitor C 6 connects, the other end of capacitor C 6 and Wiring port OUT1﹠amp; 2/TEST connects, coupling coil Z2 master output is connected with an end of capacitor C 4, the other end of capacitor C 4 is connected with an end of inductance L 2, the other end of inductance L 2 is connected with Wiring port OUT1, another output of finger assignments plug-in unit FZ/FP is connected with an end of capacitor C 5, the other end of capacitor C 5 is connected with an end of inductance L 3, the other end of inductance L 3 is connected with Wiring port OUT2, resistance R 1, R3, R4, R6, R7, the other end of R9, the other end of inductance 2L1, coupling coil Z1,2 of the earth terminal of Z2 and amplification module A1,3,6,7 pin, the earth terminal common ground of attenuator ATT.
3. the two-way amplifier that is used for the transformation of cable TV ethernet coaxial cable transmission network according to claim 1, it is characterized in that described ethernet coaxial cable transmission signals circuit comprises Wiring port RF/IN, OUT1, OUT2, inductance L 1, L2, L3, capacitor C 1, C4, C5, coupling coil Z1, Z2, duplexer filter FLT1, FLT2 and finger assignments plug-in unit FZ/FP, Wiring port RF/IN is connected with an end of inductance L 1, the other end of inductance L 1 is connected with an end of capacitor C 1, the other end of capacitor C 1 is connected with coupling coil Z1 primary input, coupling coil Z1 master output mixes end with duplexer filter FLT1 and is connected, the low go side of duplexer filter FLT1 is connected with the low go side of duplexer filter FLT2, duplexer filter FLT2 mixes end and is connected with finger assignments plug-in unit FZ/FP input, finger assignments plug-in unit FZ/FP one output is connected with coupling coil Z2 primary input, coupling coil Z2 master output is connected with an end of capacitor C 4, the other end of capacitor C 4 is connected with an end of inductance L 2, the other end of inductance L 2 is connected with Wiring port OUT1, another output of finger assignments plug-in unit FZ/FP is connected with an end of capacitor C 5, the other end of capacitor C 5 is connected with an end of inductance L 3, and the other end of inductance L 3 is connected with Wiring port OUT2.
4. the two-way amplifier that is used for the transformation of cable TV ethernet coaxial cable transmission network according to claim 1; it is characterized in that the anti-anti-lightning strike protection of surge of described Wiring port and cross circuit comprising Wiring port RF/IN; OUT1; OUT2; AC60V/IN; inductance 1L1; 1L2; 1L3; discharge tube V1; V2; V3; cross electric mortiser sheet CP1; CP2; CP3 and electric capacity 1C1; 1C2; 1C3; 1C4; 1C5; 1C6; 1C7; 1C8; 1C9; 1C10; 1C11; Wiring port RF/IN is connected with the end of discharge tube V1 and inductance 1L1; the other end of inductance 1L1 is connected with an end of crossing electric mortiser sheet CP1 with electric capacity 1C1; cross the other end and the electric capacity 1C2 of electric mortiser sheet CP1; 1C3; 1C5; 1C6; 1C7; 1C9; 1C10; 1C11; cross electric mortiser sheet CP2; the end of CP3 is connected with Wiring port AC60V/IN; the other end of crossing electric mortiser sheet CP2 is connected with the end of inductance 1L2 and electric capacity 1C4; the other end of inductance 1L2 is connected with Wiring port OUT1 with the end of discharge tube V2; the other end of crossing electric mortiser sheet CP3 is connected with the end of electric capacity 1C8 and inductance 1L3; the other end of inductance 1L3 is connected discharge tube V1 with the end of discharge tube V3 with Wiring port OUT2; V2; V3; electric capacity 1C1; 1C2; 1C3; 1C4; 1C5; 1C6; 1C7; 1C8; 1C9; 1C10; the other end common ground of 1C11.
5. the two-way amplifier that is used for the transformation of cable TV ethernet coaxial cable transmission network according to claim 1, it is characterized in that described power circuit comprises fuse FUSE1, FUSE2, inductance 3L1, light-emitting diode D1, resistance 3R1, electric capacity 3C1,3C2,3C3,3C4,3C5,3C6,3C7,3C8,3C9,3C10, diode D2, D3, D4, D5, D6, three-terminal regulator block LV-7824, K switch 1 and transformer E, the end of fuse FUSE2 is connected with the AC60V input, the other end of fuse FUSE2 is connected with the stiff end of K switch 1, two moved ends of K switch 1 respectively with the 60V of transformer E, 50V holds connection, the output of transformer E and electric capacity 3C7, the end of 3C8, the negative pole of diode D2, the positive pole of D3 connects, another output of transformer E and electric capacity 3C9, the end of 3C10, the positive pole of diode D4, the negative pole of D5 connects, diode D3, D4, the negative pole of D6, electric capacity 3C8, the other end of 3C9, the end of electric capacity 3C6 is connected with the input of three-terminal regulator block LV-7824, the positive pole of diode D6, the output of three-terminal regulator block LV-7824, electric capacity 3C5,3C4, the end of 3C3 is connected with the end of fuse FUSE1, the other end of fuse FUSE1 and resistance 3R1, electric capacity 3C2, the end of inductance 3L1 connects, the other end of resistance 3R1 is connected with the positive pole of light-emitting diode D1, the end of the other end of inductance 3L1 and electric capacity 3C1 is connected electric capacity 3C1 with 5 pin of amplification module A1,3C2,3C3,3C4,3C5,3C6,3C7, the other end of 3C10, diode D2, the anode of D5, the negative electrode of light-emitting diode D1, the earth terminal common ground of the earth terminal of transformer E and three-terminal regulator block LV-7824.
CN2010201615373U 2010-04-06 2010-04-06 Bidirectional amplifier for alteration of cable television Ethernet coaxial cable transmission networks Expired - Fee Related CN201733393U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102395021A (en) * 2011-10-26 2012-03-28 常熟市高事达光电科技有限公司 CATV (Cable Television) amplifier capable of being upgraded to EOC (Ethernet Over Coax) local-side optical receiver circuit
CN103888707A (en) * 2013-09-12 2014-06-25 陕西迈克高新科技实业集团有限公司 Amplifier with power down direct connection function
CN103973238A (en) * 2013-01-31 2014-08-06 台扬科技股份有限公司 Radio Frequency Signal Amplifier And Amplifying System
CN109921828A (en) * 2019-01-11 2019-06-21 西安电子科技大学 One kind being based on narrowband low-voltage powerline carrier communication cruising inspection system and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102395021A (en) * 2011-10-26 2012-03-28 常熟市高事达光电科技有限公司 CATV (Cable Television) amplifier capable of being upgraded to EOC (Ethernet Over Coax) local-side optical receiver circuit
CN103973238A (en) * 2013-01-31 2014-08-06 台扬科技股份有限公司 Radio Frequency Signal Amplifier And Amplifying System
CN103888707A (en) * 2013-09-12 2014-06-25 陕西迈克高新科技实业集团有限公司 Amplifier with power down direct connection function
CN109921828A (en) * 2019-01-11 2019-06-21 西安电子科技大学 One kind being based on narrowband low-voltage powerline carrier communication cruising inspection system and method

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