JPS60145748U - signal transmission equipment - Google Patents
signal transmission equipmentInfo
- Publication number
- JPS60145748U JPS60145748U JP3427684U JP3427684U JPS60145748U JP S60145748 U JPS60145748 U JP S60145748U JP 3427684 U JP3427684 U JP 3427684U JP 3427684 U JP3427684 U JP 3427684U JP S60145748 U JPS60145748 U JP S60145748U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- level
- transmission line
- tone signal
- signal transmission
- 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
Landscapes
- Noise Elimination (AREA)
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図は従来の信号伝送装置のブロック図、第２図はこ
の考案の一実施例によりる信号伝送装置のブロック図、
第３図は第２図の動作特性を説明するための特性図であ
る。
図中、１は無線装置、１２は端末制御装置、１７はミキ
サアンプ、１８はリング変調器、１９はローパスフィル
タ、２０はバンドパスフィルタ、２１は電圧比較器、２
２はボリウム、２４は正アンプ、２５はトーン発振器で
ある。なお、図 ・中、同一符号は同−又は相当
部分を示す。FIG. 1 is a block diagram of a conventional signal transmission device, and FIG. 2 is a block diagram of a signal transmission device according to an embodiment of this invention.
FIG. 3 is a characteristic diagram for explaining the operating characteristics of FIG. 2. In the figure, 1 is a wireless device, 12 is a terminal control device, 17 is a mixer amplifier, 18 is a ring modulator, 19 is a low-pass filter, 20 is a band-pass filter, 21 is a voltage comparator, 2
2 is a volume, 24 is a positive amplifier, and 25 is a tone oscillator. In the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
を介して端末装置に伝送するものにおいて、上記無線装
置側に、上記電波の受信電界レベルを検出すると共にそ
のレベルに応じた振幅のトーン信号を発生する手段、ｉ
よびこのトーン信号と上記受信音声信号を混合して上記
伝送線に出力する手段を設けると共に、上記端末装置側
に上記伝送線を介して入力される上記トーン信号を上記
受信音声信号から分離抽出する手段、およびこの抽出さ
れた上記トーン信号の振幅レベルに応じて上記音声信号
の出力レベルを制御する手段を備えたことを特徴とする
信号伝送装置。In a radio device that receives radio waves and transmits the received audio signal to a terminal device via a transmission line, the radio device detects the received electric field level of the radio wave and adjusts the amplitude according to the level. means for generating a tone signal, i
and means for mixing the tone signal and the received voice signal and outputting the mixture to the transmission line, and separating and extracting the tone signal inputted to the terminal device side via the transmission line from the received voice signal. and means for controlling the output level of the audio signal according to the amplitude level of the extracted tone signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3427684U JPS60145748U (en) | 1984-03-08 | 1984-03-08 | signal transmission equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3427684U JPS60145748U (en) | 1984-03-08 | 1984-03-08 | signal transmission equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60145748U true JPS60145748U (en) | 1985-09-27 |
Family
ID=30537494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3427684U Pending JPS60145748U (en) | 1984-03-08 | 1984-03-08 | signal transmission equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60145748U (en) |
-
1984
- 1984-03-08 JP JP3427684U patent/JPS60145748U/en active Pending
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