JPS6025285U - television relay broadcaster - Google Patents
television relay broadcasterInfo
- Publication number
- JPS6025285U JPS6025285U JP1983115723U JP11572383U JPS6025285U JP S6025285 U JPS6025285 U JP S6025285U JP 1983115723 U JP1983115723 U JP 1983115723U JP 11572383 U JP11572383 U JP 11572383U JP S6025285 U JPS6025285 U JP S6025285U
- Authority
- JP
- Japan
- Prior art keywords
- output
- frequency converter
- gain control
- gain
- control signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Monitoring And Testing Of Transmission In General (AREA)
- Control Of Amplification And Gain Control (AREA)
- Transceivers (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来のＴＶ中継放送機のブロック図、第２図は
第１図の利得制御回路４を除いて構成したＴＶ中継放送
機のブロック図、第３図は本考案の一実施例のブ爾ツク
図である。
１・・・・・・入力端子、２・・・・・・前置増幅器、
３・・・・・・第１周波数変換器、４，１１・・・・・
・利得制御回路、５・・・・・・入力検知回路、６・・
・・・・可変利得増幅器、７・・・・・・第２周波数変
換器、８・・・・・・高レベル増幅器、９・・・・・・
結合器、１０・・・・・・出力端子、１２・・・・・・
タイマー、１３・・・・・・スイッチ回路。FIG. 1 is a block diagram of a conventional TV relay broadcasting device, FIG. 2 is a block diagram of a TV relay broadcasting device configured without the gain control circuit 4 of FIG. 1, and FIG. This is a book diagram. 1...Input terminal, 2...Preamplifier,
3...First frequency converter, 4, 11...
・Gain control circuit, 5... Input detection circuit, 6...
...Variable gain amplifier, 7...Second frequency converter, 8...High level amplifier, 9...
Coupler, 10... Output terminal, 12...
Timer, 13...Switch circuit.
Claims (1)
ある第１の周波数変換器と、この第１の周波数変換器の
出力を受は第２の利得制御信号に応じ利得が変わる可変
利得増幅器と、この可変利得増幅器の出力を受ける第２
の周波数変換器と、この第２の周波数変換器の出力を受
は前記第２の利得制御信号を生じる利得制御回路と、前
記第１の周波数変換器出力が所定値を越えている第１の
状態か前記第１の周波数変換器出力がその所定値を越え
ていない第２の状態かを検知する入力検知回路とを備え
、前記第２の利得制御信号は前記第１の状態のとき前記
第２の周波数変換器の出力に応じた信号であり前記第２
の状態のとき前記可変利得増幅器の利得をほぼ最低にす
る所定の信号であるテレビジョン中継放送機において、
前記第１の利得制御信号として、前記第２の状態にある
期間及び前記第１の状態になってから所定の期間には前
記前置増幅回路の出力をほぼ最大にする所定信号を選択
しその他の期間には前記第２の利得制御信号を選択する
回路を備えることを特徴とするテレビジョン中継放送機
。a first frequency converter with a preamplifier circuit whose gain changes according to a first gain control signal; and a variable gain whose gain changes according to a second gain control signal that receives the output of the first frequency converter; an amplifier, and a second amplifier receiving the output of the variable gain amplifier.
a gain control circuit that receives the output of the second frequency converter and generates the second gain control signal; and a gain control circuit that receives the output of the second frequency converter and generates the second gain control signal; and an input detection circuit for detecting whether the output of the first frequency converter is in a second state in which the output of the first frequency converter does not exceed a predetermined value, and the second gain control signal is in the first state. The signal corresponds to the output of the second frequency converter and the second frequency converter.
In a television relay broadcaster, the signal is a predetermined signal that makes the gain of the variable gain amplifier approximately the minimum in the state of
As the first gain control signal, select a predetermined signal that substantially maximizes the output of the preamplifier circuit during the period in the second state and during a predetermined period after entering the first state; 1. A television relay broadcasting device comprising a circuit for selecting the second gain control signal during the period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983115723U JPS6025285U (en) | 1983-07-26 | 1983-07-26 | television relay broadcaster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983115723U JPS6025285U (en) | 1983-07-26 | 1983-07-26 | television relay broadcaster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6025285U true JPS6025285U (en) | 1985-02-20 |
Family
ID=30267036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1983115723U Pending JPS6025285U (en) | 1983-07-26 | 1983-07-26 | television relay broadcaster |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6025285U (en) |
-
1983
- 1983-07-26 JP JP1983115723U patent/JPS6025285U/en active Pending
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