JPS62171281U - - Google Patents
Info
- Publication number
- JPS62171281U JPS62171281U JP1986057613U JP5761386U JPS62171281U JP S62171281 U JPS62171281 U JP S62171281U JP 1986057613 U JP1986057613 U JP 1986057613U JP 5761386 U JP5761386 U JP 5761386U JP S62171281 U JPS62171281 U JP S62171281U
- Authority
- JP
- Japan
- Prior art keywords
- carrier signal
- trunk
- branch
- signal
- main
- 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
- 230000003321 amplification Effects 0.000 claims 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Landscapes
- Details Of Television Systems (AREA)
Description
第１図は本考案の一実施例に係る幹線増幅器を
示すブロツク構成図、第２図はＣＡＴＶシステム
を示す線路図、第３図はＣＡＴＶシステムに於け
る伝送信号のスペクトラムを示す図、第４図は従
来の幹線増幅器を示すブロツク構成図である。
１１……ヘツドエンド装置、１２……幹線同軸
線路、１３，１４……幹線増幅器、１５……幹線
増幅器分岐出力端子、１６……分岐線同軸線路、
１７……分岐器、１８……加入者端末、１９……
ラインイクステンダ、２１……テレビチヤンネル
信号、２２……パイロツトキヤリア、３１……幹
線入力端子、３２……幹線増幅部、３３，３６…
…分岐回路、３４……バンドパスフイルタ、３５
……直流増幅器、３７……分岐増幅部、３８……
幹線出力端子、３９……分配器、４１……スイツ
チ、４２……トラツプ回路。
Fig. 1 is a block configuration diagram showing a mains amplifier according to an embodiment of the present invention, Fig. 2 is a line diagram showing a CATV system, Fig. 3 is a diagram showing the spectrum of a transmission signal in the CATV system, and Fig. 4 The figure is a block diagram showing a conventional trunk amplifier. 11...Head end device, 12...Main coaxial line, 13, 14...Main amplifier, 15...Main amplifier branch output terminal, 16...Branch line coaxial line,
17... Turnout, 18... Subscriber terminal, 19...
Line extender, 21... TV channel signal, 22... Pilot carrier, 31... Main line input terminal, 32... Main line amplifier, 33, 36...
...branch circuit, 34...bandpass filter, 35
...DC amplifier, 37... Branch amplifier section, 38...
Main line output terminal, 39...distributor, 41...switch, 42...trap circuit.
Claims (1)
テレビ信号とは異なる周波数のキヤリア信号を共
に増幅する幹線増幅部と、 この幹線増幅部を介して増幅される上記キヤリ
ア信号の信号レベルをその出力端において一定レ
ベルに調整されるよう制御するＡＧＣ回路と、上
記幹線増幅部からの出力信号を上記幹線同軸線路
より分岐し分岐出力端子に供給する分岐回路と、 この分岐回路と分岐出力端子との間に配設され
上記キヤリア信号に対応する周波数帯の通過を阻
止するトラツプ回路とを具備したことを特徴とす
る幹線増幅器。[Claim for Utility Model Registration] A trunk amplification section that amplifies both a television signal transmitted on a trunk coaxial line and a carrier signal of a frequency different from the television signal, and the carrier signal amplified via this trunk amplification section. a branch circuit that branches the output signal from the main line amplifier section from the main coaxial line and supplies it to the branch output terminal; and a trap circuit disposed between the carrier signal and the branch output terminal for blocking passage of a frequency band corresponding to the carrier signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986057613U JPS62171281U (en) | 1986-04-18 | 1986-04-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986057613U JPS62171281U (en) | 1986-04-18 | 1986-04-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62171281U true JPS62171281U (en) | 1987-10-30 |
Family
ID=30887482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986057613U Pending JPS62171281U (en) | 1986-04-18 | 1986-04-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62171281U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0787474A (en) * | 1993-09-16 | 1995-03-31 | Nec Corp | Catv transmitter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51120608A (en) * | 1975-04-16 | 1976-10-22 | Nec Corp | Tv transmission automatic gain control system |
-
1986
- 1986-04-18 JP JP1986057613U patent/JPS62171281U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51120608A (en) * | 1975-04-16 | 1976-10-22 | Nec Corp | Tv transmission automatic gain control system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0787474A (en) * | 1993-09-16 | 1995-03-31 | Nec Corp | Catv transmitter |
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