JPH01169846U - - Google Patents
Info
- Publication number
- JPH01169846U JPH01169846U JP6643188U JP6643188U JPH01169846U JP H01169846 U JPH01169846 U JP H01169846U JP 6643188 U JP6643188 U JP 6643188U JP 6643188 U JP6643188 U JP 6643188U JP H01169846 U JPH01169846 U JP H01169846U
- Authority
- JP
- Japan
- Prior art keywords
- communication
- carrier
- receiving side
- signal
- detection means
- 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
- 238000001514 detection method Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Circuits Of Receivers In General (AREA)
Description
第１図はこの考案の一実施例を示すブロツク線
図である。
図面において、１は親局、２，１２はアンテナ
、３は送信部、４はマイク装置、５はデイジタル
制御信号発生器、６，１７はＣＰＵ、７はキーボ
ード、１１は子局、１３は受信部、１４はデイジ
タル制御信号復調回路、１５はノイズスケルチ回
路、１６はキヤリア検出回路、１８はスピーカ装
置である。
FIG. 1 is a block diagram showing one embodiment of this invention. In the drawing, 1 is a master station, 2 and 12 are antennas, 3 is a transmitter, 4 is a microphone device, 5 is a digital control signal generator, 6 and 17 are CPUs, 7 is a keyboard, 11 is a slave station, and 13 is a receiver 14 is a digital control signal demodulation circuit, 15 is a noise squelch circuit, 16 is a carrier detection circuit, and 18 is a speaker device.
Claims (1)
信号で遠隔地に位置する受信側を開始信号で通信
を開始するとともに、通信終了時にはコード化さ
れた終了信号をデジタル無線信号で前記受信側に
送信し、前記受信側との通信を終了して初期状態
にリセツトする無線通信機において、前記受信側
には前記送信側からのキヤリアを検知する検出手
段を備え、前記送信側からのキヤリアが無いこと
を検知することにより前記受信側を初期状態にリ
セツトすることを特徴とする無線通信機の通信終
了検知装置。 (2) 前記検出手段はスケルチ回路に接続され、
スケルチ信号により前記キヤリアの有無を識別す
ることを特徴とする請求項１に記載の無線通信機
の通信終了検知装置。 (3) 前記検出手段は時定数回路を備え、通信中
の瞬時的なキヤリアの断には応答しないようにな
つていることを特徴とする請求項１あるいは２に
記載の無線通信機の通信終了検知装置。[Claims for Utility Model Registration] (1) A coded digital radio signal from a transmitter sends a start signal to a receiver located at a remote location to start communication, and sends a coded end signal at the end of the communication. A wireless communication device that transmits a digital radio signal to the receiving side, terminates communication with the receiving side, and resets to an initial state, wherein the receiving side includes a detection means for detecting a carrier from the transmitting side, A communication end detection device for a wireless communication device, characterized in that the receiving side is reset to an initial state by detecting that there is no carrier from the transmitting side. (2) the detection means is connected to a squelch circuit;
2. The communication end detection device for a wireless communication device according to claim 1, wherein the presence or absence of the carrier is determined based on a squelch signal. (3) The end of communication of the radio communication device according to claim 1 or 2, wherein the detection means includes a time constant circuit and is configured not to respond to instantaneous interruption of carrier during communication. Detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6643188U JPH01169846U (en) | 1988-05-20 | 1988-05-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6643188U JPH01169846U (en) | 1988-05-20 | 1988-05-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01169846U true JPH01169846U (en) | 1989-11-30 |
Family
ID=31291836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6643188U Pending JPH01169846U (en) | 1988-05-20 | 1988-05-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01169846U (en) |
-
1988
- 1988-05-20 JP JP6643188U patent/JPH01169846U/ja active Pending
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