JPS5890771U - RF modulator - Google Patents
RF modulatorInfo
- Publication number
- JPS5890771U JPS5890771U JP18598681U JP18598681U JPS5890771U JP S5890771 U JPS5890771 U JP S5890771U JP 18598681 U JP18598681 U JP 18598681U JP 18598681 U JP18598681 U JP 18598681U JP S5890771 U JPS5890771 U JP S5890771U
- Authority
- JP
- Japan
- Prior art keywords
- channel
- carrier wave
- oscillator
- receiver circuit
- output
- 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
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図は本考案になるＲＦモジュレータを適用したＶＴ
Ｒの一例の概略斜視図、第２図は上記ＲＦモジュレータ
の一実施例の回路図である。
１・・・・・・ＶＴＲ，３・・・・・・テレビアンテナ
、５・・・・・・同調回路、６・・・・・・検波回路、
８・・・・・・受信回路、１０・・・・・・ＲＦモジュ
レータ、１１・・・・・・第１の水晶発振子、１２・・
・・・・第２の水晶発振子、１３・・・・・・映像搬送
波出力端子、１４・・・・・・切換回路。Figure 1 shows a VT to which the RF modulator of the present invention is applied.
FIG. 2 is a schematic perspective view of an example of R, and FIG. 2 is a circuit diagram of an embodiment of the RF modulator. 1... VTR, 3... Television antenna, 5... Tuning circuit, 6... Detection circuit,
8... Receiving circuit, 10... RF modulator, 11... First crystal oscillator, 12...
...Second crystal oscillator, 13...Video carrier wave output terminal, 14...Switching circuit.
Claims (1)
に対応して設けられ、夫々対応するチャンネルの周波数
をもつ変調用搬送波を出力する発振器と、前記２個のチ
ャンネルのうち予め定めた一方のチャンネルに同調する
よう設定され、放送電波中に該一方のチャンネルが含ま
れている場合は、これを同調・検波す之受信回路と、該
受信回路の出力の有無に応じて前記発振器の搬送波出力
を選択的に切換え、空きチャンネルに対応する方の変調
用搬送波を出力させる切換手段とを設けてなるＲＦモジ
ュレータ。an oscillator that is provided corresponding to two channels, one of which is an empty channel, and outputs a modulation carrier wave having the frequency of the corresponding channel; If one channel is set to be tuned and one channel is included in the broadcast radio wave, the receiver circuit will tune and detect this, and the carrier wave output of the oscillator will be selected depending on the presence or absence of the output of the receiver circuit. and a switching means for outputting a modulation carrier wave corresponding to an empty channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18598681U JPS5890771U (en) | 1981-12-14 | 1981-12-14 | RF modulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18598681U JPS5890771U (en) | 1981-12-14 | 1981-12-14 | RF modulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5890771U true JPS5890771U (en) | 1983-06-20 |
Family
ID=29987529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18598681U Pending JPS5890771U (en) | 1981-12-14 | 1981-12-14 | RF modulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5890771U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5831675A (en) * | 1981-08-20 | 1983-02-24 | Sanyo Electric Co Ltd | Switching device of rf converter for vtr |
-
1981
- 1981-12-14 JP JP18598681U patent/JPS5890771U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5831675A (en) * | 1981-08-20 | 1983-02-24 | Sanyo Electric Co Ltd | Switching device of rf converter for vtr |
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