CN2149075Y

CN2149075Y - Multi-function inserter for wire TV

Info

Publication number: CN2149075Y
Application number: CN 92235365
Authority: CN
Inventors: 金宣元
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-11-24
Filing date: 1992-11-24
Publication date: 1993-12-08
Anticipated expiration: 2002-11-24

Abstract

The utility model relates to a multi-function inserter for a cable TV. The input end and the output end of a splicing amplifier are connected with high frequency capacitors C[1], C[2]; the input end of a power source or the powder source of the amplifier, and the output end and the input end of the audio are connected with magnetic inductors L[1], L[2]. The capacitors C[1], C[2] play the action of DC blocking and only DC; the inductors L[1], L[2] can not pass the high frequency television signal. The utility model can be used, and then any amplifier can accomplish concentration feed and the audio to transmit on a cable. The power supply of the total system can not be interrupted in the system test and no longer live testing.

Description

Multi-function inserter for wire TV

The utility model relates to a kind of cable TV components and parts, particularly a kind of cable TV plug connector.

At present in our the used cable TV device, plain edition, feed type and audio frequency cable mode transmission etc. are altogether not arranged.Because the mouthpiece function singleness, make that they exist that versatility is poor, system's input, output test inconvenience and the uneasy congruent shortcoming of live testing.

The purpose of this utility model provides a kind of cable TV inserter of alternative original plurality of specifications input/output interface spare.

The utility model shell is one square, and respectively there is a binding post at two, and upper and lower end respectively has two F type joints, is connected to capacitor C at the input of grafting amplifier, output or output, input ₁, C ₂, in socket power output, people or audio frequency output, enter termination inductance L is arranged ₁, L ₂, be connected to lightning protection surge resistance R at each input/output terminal ₁R ₂R ₃C ₁, C ₂Be high frequency capacitance, generally about 32P～1500P, it plays blocking direct current and alternating current in the line, namely has in the line two kinds of different signals, and a kind of is alternating voltage or audio voltage, when another kind is high-frequency TV signal, passes through C ₁Or C ₂After, alternating voltage or audio voltage are blocked and can not pass through, and high-frequency TV signal can pass through smoothly.L ₁, L ₂Be a magnetic inductance, it can only allow the alternating voltage of 50Hz or phase formula pass through in the line, and the high-frequency signal of several NHz is equivalent to open circuit, can not pass through.Lightning protection surge resistance R ₁R ₂R ₃When thunder and lightning attracts from different terminals, promptly over the ground conducting discharge, thus protected amplifier not hit window.

Fig. 1 is the inserter plane graph.

Fig. 2 is the inserter end view.

Fig. 3 is the inserter circuit theory diagrams.

As Fig. 1, Fig. 2, shown in Figure 3, the utility model shell is one square, and respectively there is a binding post 5,6 at two, is output, input or the audio frequency output of power supply, input; F type joint 1,2 is pegged graft for backbone;

F type joint

3,4 is pegged graft for amplifier.Be connected to capacitor C at the input of grafting amplifier, output or output, input ₁, C ₂Be connected to inductance L at socket power output, input or audio frequency output, input ₁, L ₂Signal is by the 1000P capacitor C ₁, C ₂After, alternating voltage or audio voltage are blocked, and high-frequency TV signal can pass through smoothly.Like this, pass through C ₁, C ₂After enter amplifier or other device, just have only high-frequency TV signal; And by the magnetic inductance L ₁Or L ₂Have only alternating voltage or audio voltage, high-frequency TV signal is blocked again.

Use the utility model, can realize any amplifier to concentrate feed and audio frequency co-cable transmission, and when system testing, not add any switching device and also can not interrupt system-wide power supply, also live testing no longer, test safety is convenient.To audio frequency co-cable transmission device, the utility model can replace input, the output interface spare of original plurality of specifications, realize one multiplex and cost is the price of a splitter; And the utility model also has anti-lightning strike function, but the expensive amplifier of safeguard protection.

Claims

1, a kind of cable TV inserter is characterized in that respectively there is a binding post at two on its square shell, and upper and lower side respectively has two F type joints; Be connected to capacitor C at the input of grafting amplifier, output or output, input ₁, C ₂, be connected to inductance L at socket power output, input or audio frequency output, input ₁, L ₂, on each input, output, be connected to lightning protection surge resistance R ₁, R ₂, R ₃

2, inserter according to claim 1 is characterized in that said capacitor C ₁, C ₂High frequency capacitance for 32P～1500P.

3, inserter according to claim 1 and 2 is characterized in that said inductance L ₁, L ₂Be the magnetic inductance.