JPS6178483U - - Google Patents
Info
- Publication number
- JPS6178483U JPS6178483U JP16322184U JP16322184U JPS6178483U JP S6178483 U JPS6178483 U JP S6178483U JP 16322184 U JP16322184 U JP 16322184U JP 16322184 U JP16322184 U JP 16322184U JP S6178483 U JPS6178483 U JP S6178483U
- Authority
- JP
- Japan
- Prior art keywords
- channel
- beat
- signal
- modulator
- channel frequency
- 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
- 239000000284 extract Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
Description
第１図は本考案の一実施例のブロツク図である
。
１……電波変調器、２……ＲＦモジユレーター
チヤンネル周波数切換スイツチ、３……チヤンネ
ル切換回路、４……チヤンネル切換スイツチ制御
回路、５……トリガ信号発生回路、６……検出制
御回路、７……検波回路、８……６ＭＨｚ帯バン
ドパスフイルター回路、９……スイツチ、１０…
…混合回路、１１……ＲＦモジユレーター使用チ
ヤンネル周波数バンドパスフイルター、１２……
スイツチ、１３……アンテナ、１４……アンテナ
出力端、１０１…ＲＦモジユレーター出力信号、
１０２…アンテナ入力信号、１０３……バンドパ
ス出力信号、１０４……混合信号、１０５……６
ＭＨｚ信号、１０６……検波出力信号、１０７…
…初期設定用信号、１０８……トリガ回路制御信
号、１０９……トリガ信号、１１０……チヤンネ
ル切換制御信号、１１１……強制切換信号、１１
２……強制切換チヤンネル設定信号、１１３……
チヤンネル切換制御信号、１１４……アンテナ出
力信号、１１５……制御信号、１１６……ビデオ
・テレビ切換スイツチ。
FIG. 1 is a block diagram of one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Radio wave modulator, 2... RF modulator channel frequency switching switch, 3... Channel switching circuit, 4... Channel switching switch control circuit, 5... Trigger signal generation circuit, 6... Detection control circuit, 7...Detection circuit, 8...6MHz band band pass filter circuit, 9...Switch, 10...
...Mixing circuit, 11...RF modulator using channel frequency band pass filter, 12...
Switch, 13... Antenna, 14... Antenna output end, 101... RF modulator output signal,
102...Antenna input signal, 103...Band pass output signal, 104...Mixed signal, 105...6
MHz signal, 106...Detection output signal, 107...
... Initial setting signal, 108 ... Trigger circuit control signal, 109 ... Trigger signal, 110 ... Channel switching control signal, 111 ... Forced switching signal, 11
2...Forced switching channel setting signal, 113...
Channel switching control signal, 114...Antenna output signal, 115...Control signal, 116...Video/TV switching switch.
Claims (1)
波の一方のチヤンネル周波数とアンテナよりバン
ドパスフイルター回路を通つてくる特定チヤンネ
ル周波数とを混合回路にて混合させビートを作り
、バンドパスフイルター回路により前記ビードト
を取出し、前記ビートの有無により検出制御回路
にて空チヤンネルを判定し使用できる空チヤンネ
ルを選択し使用チヤンネルを自動的に切換えるこ
とを特徴とする自動空チヤンネル選択ＲＦモジユ
レーター。 RF modulator channel frequency 2
A mixing circuit mixes one channel frequency of the wave and a specific channel frequency that passes through a bandpass filter circuit from the antenna to create a beat.The bandpass filter circuit extracts the beat, and detects and controls the beat based on the presence or absence of the beat. An automatic empty channel selection RF modulator characterized in that an empty channel is determined, a usable empty channel is selected, and the used channel is automatically switched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16322184U JPS6178483U (en) | 1984-10-29 | 1984-10-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16322184U JPS6178483U (en) | 1984-10-29 | 1984-10-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6178483U true JPS6178483U (en) | 1986-05-26 |
Family
ID=30721080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16322184U Pending JPS6178483U (en) | 1984-10-29 | 1984-10-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6178483U (en) |
-
1984
- 1984-10-29 JP JP16322184U patent/JPS6178483U/ja active Pending