CN201450536U

CN201450536U - Coaxial cable compound transmission device

Info

Publication number: CN201450536U
Application number: CN2009200574509U
Authority: CN
Inventors: 张洪海
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-05-27
Filing date: 2009-05-27
Publication date: 2010-05-05
Anticipated expiration: 2019-05-27

Abstract

The utility model discloses a coaxial cable compound transmission device, which comprises a compound module (K1) and a separation module (K3). The compound module (K1) and a separation module (K3) are both provided with a high-pass filter and a low-pass filter, the input ends of the high-pass filter and the low-pass filter of the compound module (K1) respectively have access to cable television signals and telephone and DSL signals, the two signals are compounded and then input to the input end of the separation module (K3) through the output ends of the high-pass filter and the low-pass filter of the compound module (K1), and the separation module (K3) separates the signals and respectively output cable television signals and telephone and DSL signals through the output ends of the high-pass filter and the low-pass filter thereof. The utility model has no influence on the normal use of the original television, telephone and DSL, simultaneously realizes the coaxial cable compound transmission of sharing users, fully applies the transmission capacity of the coaxial cable, reduces the repeated construction of user lines, and saves line resources. Moreover, since only the inductor and capacitor components are used in the filter circuit, the utility model has the advantage of simple structure.

Description

The compound transmitting device of coaxial cable

Technical field

The utility model relates to a kind of signal with different frequency and realizes device compound, that separate and transmit by filter circuit on cable line, especially transmits on the cable tv coax of registering one's residence.

Background technology

At present, for community's light current transmission system, cable TV signal transmits by coaxial cable, and phone and DSL signal transmit by twisted-pair feeder, and both belong to independently two cover systems respectively.But in fact, phone and DSL carrier frequency are lower than 1.1 million Hz, and the cable TV frequency of carrier signal is much larger than 1.1 million Hz, so the transmission spectrum of coaxial cable can be contained both fully, but only be used to transmit a kind of signal, obviously fail to make full use of the transmittability of coaxial cable.

The utility model content

The purpose of this utility model is to provide a kind of and cable TV signal, phone and DSL signal can be transmitted and the compound transmitting device of non-interfering coaxial cable by same set of coaxial transmission network.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: the compound transmitting device of coaxial cable, comprise composite module and separation module, described composite module and separation module are equipped with high pass filter and low pass filter, the high pass filter of composite module, the input of low pass filter is incoming cable television signal respectively, phone and DSL signal, two kinds of signals are compound after output inputs to the input of separation module, and separation module is with Signal Separation and through its high pass filter, the output of low pass filter is exported cable TV signal respectively, phone and DSL signal.

Be connected to bypass module between described composite module and the separation module, bypass module is provided with the low pass filter that is arranged in parallel with cable TV splitter or distributor.

Owing to adopted above-mentioned structure, the utility model can be in the normal use that does not influence original TV, phone and DSL, realize the compound transmission of the shared coaxial cable of registering one's residence, give full play to the transmittability of coaxial cable, common network transmission aspect realization cable TV signal, phone and DSL signal are registered one's residence in community, above-mentioned signal is all transmitted by same set of coaxial transmission network, do not disturb mutually, reduce the repeated construction of the circuit of registering one's residence, save line resource, only adopt inductance capacitor element in the filter circuit, simple in structure.

Description of drawings

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

Fig. 1 is the circuit theory diagrams of the utility model composite module;

Fig. 2 is the circuit theory diagrams of the utility model separation module;

Fig. 3 is the circuit theory diagrams of the utility model bypass module;

Fig. 4 is an assembling connection layout of the present utility model.

Embodiment

As shown in Figures 1 to 4, among the figure: 1,2,6,7,8,12,15 inductance, 3,4,5,9,10,11,13,14 electric capacity, d1, d2, d3 common ground end, be connected with the module metal shell, inputla composite module phone and DSL input terminal, inputlb composite module cable TV input terminal, output 1 composite module lead-out terminal, input2a bypass module composite signal input terminal, input2b splitter signal input terminal, output2a bypass module TV signal output end, output2b bypass module composite signal lead-out terminal, input3 separation module input terminal, onput3a separation module phone and DSL lead-out terminal, output3b separation module cable TV lead-out terminal, the k1 composite module, the k2 bypass module, k3 separation module, f cable TV signal splitter, the L1 coaxial cable of registering one's residence, L2 is through the indoor coaxial cable behind the splitter.

In Fig. 1,

inductance

1,2 and electric capacity 3 are formed low pass filter, and

electric capacity

4,5 and inductance 6 are formed high pass filter.

In Fig. 2,

inductance

7,8 and electric capacity 9 are formed low pass filter, and

electric capacity

10,11 and inductance 12 are formed high pass filter.

In Fig. 3,

inductance

13,14 and electric capacity 15 are formed low pass filter.

As shown in Figure 4, the compound transmitting device of coaxial cable described in the utility model, comprise composite module K1, bypass module K2, separation module K3, composite module K1, bypass module K2, separation module K3 are connected on the output of the end of registering one's residence of coaxial cable, indoor branch distributor end, coaxial cable respectively.Each submodule comprises one to two low pass or high pass filter, and shell adopts metal-back, to reach the effect that shielding is preferably disturbed.

Described composite module K1 and separation module K3 are equipped with high pass filter and low pass filter, high pass filter and low pass filter adopt simple LC inductance capacitor filtering circuit to form, the centre frequency of filter is set between 1.1 million Hz and 20,000,000 Hz, make cable TV signal can pass through high pass filter, can not pass through low pass filter, on the contrary, phone and DSL signal can pass through low pass filter, can not pass through high pass filter.The input and output impedance of high pass filter and the transfer impedance of cable tv coax (75 ohm) are complementary, and the input and output impedance of low pass filter and the transfer impedance of telephone wire (about 100 ohm) are complementary.The high pass filter of composite module K1, the input of low pass filter be incoming cable television signal, phone and DSL signal respectively, two kinds of signals are compound after output inserts same coaxial cable, be transferred to the input of separation module K3 jointly, separation module K3 exports cable TV signal, phone and DSL signal respectively with Signal Separation and through the output of its high pass filter, low pass filter, cable TV signal passes through high pass filter, phone and DSL signal are separated by low pass filter, output to respectively separately on the relevant terminal electrical equipment.Be connected to bypass module K2 between described composite module K1 and the separation module K3, bypass module K2 is provided with the low pass filter that is arranged in parallel with cable TV splitter or distributor.

Detailed wiring and signal transmission form among Fig. 4 are as described below: cable TV signal and phone DSL signal pass through high pass filter and the low pass filter that inputlb and inputla receive k1 respectively, all the output 1 from k1 outputs to the same coaxial cable L1 that registers one's residence, be transferred to k2 always, enter k2 from input2a, phone DSL signal is exported from output2b through low pass filter, TV signal outputs to f from output3a, enter k2 through behind the f from input3b, output to L2 with phone DSL signal from output2b again, composite signal enters k3 through L2 from input3, phone DSL signal is exported from onput3a by low pass filter, enter telephone set or DSL terminal, cable TV signal is exported from onput3b by high pass filter, enters television set or set-top box.

Claims

1. compound transmitting device of coaxial cable, it is characterized in that: comprise composite module (K1) and separation module (K3), described composite module (K1) and separation module (K3) are equipped with high pass filter and low pass filter, the high pass filter of composite module (K1), the input of low pass filter is incoming cable television signal respectively, phone and DSL signal, two kinds of signals are compound after output inputs to the input of separation module (K3), and separation module (K3) is with Signal Separation and through its high pass filter, the output of low pass filter is exported cable TV signal respectively, phone and DSL signal.

2. according to the compound transmitting device of the described coaxial cable of claim 1, it is characterized in that: be connected to bypass module (K2) between described composite module (K1) and the separation module (K3), bypass module (K2) is provided with the low pass filter that is arranged in parallel with cable TV splitter or distributor.