JPS6226988U - - Google Patents
Info
- Publication number
- JPS6226988U JPS6226988U JP11783885U JP11783885U JPS6226988U JP S6226988 U JPS6226988 U JP S6226988U JP 11783885 U JP11783885 U JP 11783885U JP 11783885 U JP11783885 U JP 11783885U JP S6226988 U JPS6226988 U JP S6226988U
- Authority
- JP
- Japan
- Prior art keywords
- upstream
- headend
- terminal
- amplifier
- transmission system
- 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
- 230000002457 bidirectional effect Effects 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 4
- 238000011144 upstream manufacturing Methods 0.000 claims 4
- 239000000203 mixture Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
Description
第１図は本考案の一実施例を示した回路ブロツ
ク図、第２図は本考案の双方向増幅器を用いた双
方向と一方向の混在システムの説明図、第３図は
第１図の他の変形例を示した回路ブロツク図、第
４，５図は自動切換機能を備えた本考案の他の実
施例を示した回路ブロツク図である。
１：入力端子、２：出力端子、３，４：分離結
合回路、５：下り信号線、６：上り信号線、７：
ハイアンプ、８：ローアンプ、９：切換スイツチ
、１０：ダミー抵抗、１１：ヘツドエンド、１２
：幹線、１３，１４：分岐線、１５ａ〜１５ｅ：
双方向増幅器、１６：分配器、１８：ＶＳＷＲ検
出回路、２０：スイツチ制御部。
Fig. 1 is a circuit block diagram showing one embodiment of the present invention, Fig. 2 is an explanatory diagram of a mixed bidirectional and unidirectional system using the bidirectional amplifier of the present invention, and Fig. 3 is the same as Fig. 1. 4 and 5 are circuit block diagrams showing other embodiments of the present invention having an automatic switching function. 1: Input terminal, 2: Output terminal, 3, 4: Separation/coupling circuit, 5: Down signal line, 6: Up signal line, 7:
High amplifier, 8: Low amplifier, 9: Selector switch, 10: Dummy resistor, 11: Head end, 12
: Main line, 13, 14: Branch line, 15a-15e:
Bidirectional amplifier, 16: distributor, 18: VSWR detection circuit, 20: switch control section.
Claims (1)
ヘツドエンドへの上り信号の両方を伝送する双方
向伝送系と、ヘツドエンドから端末への下り信号
のみを伝送する一方向伝送系とを混在して成るＣ
ＡＴＶ伝送システムに用いられる双方向増幅回路
に於いて、 入出力段の分離結合回路で分けられた上り信号
および下り信号の各々を個別に増幅する増幅器を
有し、該上り信号用増幅器の入力または出力に上
り信号用インピーダンス整合素子と上り伝送線路
との接続を切換えるスイツチ手段を設けたことを
特徴とする双方向増幅器。[Claims for Utility Model Registration] A two-way transmission system that transmits both downlink signals from the headend to the terminal and uplink signals from the terminal to the headend, and a one-way transmission system that transmits only the downlink signal from the headend to the terminal. C consisting of a mixture of
A bidirectional amplifier circuit used in an ATV transmission system has an amplifier that individually amplifies each of the upstream and downstream signals separated by the input/output stage separation/coupling circuit, and the input or output of the upstream signal amplifier is A bidirectional amplifier characterized in that the output is provided with a switch means for switching the connection between an impedance matching element for an upstream signal and an upstream transmission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11783885U JPS6226988U (en) | 1985-07-31 | 1985-07-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11783885U JPS6226988U (en) | 1985-07-31 | 1985-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6226988U true JPS6226988U (en) | 1987-02-18 |
Family
ID=31003726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11783885U Pending JPS6226988U (en) | 1985-07-31 | 1985-07-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6226988U (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5344295A (en) * | 1976-09-30 | 1978-04-20 | Yamada Kikai Kogyo Kk | Combining machine |
| JPS5710138U (en) * | 1980-06-19 | 1982-01-19 | ||
| JPS58101582A (en) * | 1981-12-12 | 1983-06-16 | Murata Mfg Co Ltd | Catv system |
| JPS5830370B2 (en) * | 1978-10-20 | 1983-06-29 | ワイケイケイ株式会社 | Billet conveying device at the entrance and exit of a heat treatment furnace |
-
1985
- 1985-07-31 JP JP11783885U patent/JPS6226988U/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5344295A (en) * | 1976-09-30 | 1978-04-20 | Yamada Kikai Kogyo Kk | Combining machine |
| JPS5830370B2 (en) * | 1978-10-20 | 1983-06-29 | ワイケイケイ株式会社 | Billet conveying device at the entrance and exit of a heat treatment furnace |
| JPS5710138U (en) * | 1980-06-19 | 1982-01-19 | ||
| JPS58101582A (en) * | 1981-12-12 | 1983-06-16 | Murata Mfg Co Ltd | Catv system |
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