JPH0459650U - - Google Patents
Info
- Publication number
- JPH0459650U JPH0459650U JP1990100953U JP10095390U JPH0459650U JP H0459650 U JPH0459650 U JP H0459650U JP 1990100953 U JP1990100953 U JP 1990100953U JP 10095390 U JP10095390 U JP 10095390U JP H0459650 U JPH0459650 U JP H0459650U
- Authority
- JP
- Japan
- Prior art keywords
- ssb
- oscillator
- monitor
- sidetone
- demodulator
- 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.)
- Granted
Links
- 230000010355 oscillation Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Monitoring And Testing Of Transmission In General (AREA)
- Transceivers (AREA)
Description
第１図及び第２図はこの考案に係るるモニター
回路の実施例を示し、第１図は回路図、第２図は
ＤＤＳの構成ブロツク図である。第３図は従来例
の回路図である。
主な符号の説明、１……ＳＳＢ復調回路、２…
…ＤＤＳ、３……発振周波数切替器、４……モー
ド切替えスイツチ、５……電鍵連動スイツチ、６
……電鍵、７……アンプ、８……スピーカ、１２
……データ加算器、１３……アドレスカウンタ、
１４……ＲＯＭ、１５……クロツク発振器、１６
……Ｄ／Ａ変換器、１７……ローパスフイルタ。
1 and 2 show an embodiment of a monitor circuit according to this invention, with FIG. 1 being a circuit diagram and FIG. 2 being a block diagram of a DDS. FIG. 3 is a circuit diagram of a conventional example. Explanation of main symbols, 1...SSB demodulation circuit, 2...
...DDS, 3...Oscillation frequency switch, 4...Mode changeover switch, 5...Electronic key interlocking switch, 6
... Telephone key, 7 ... Amplifier, 8 ... Speaker, 12
...Data adder, 13...Address counter,
14...ROM, 15...clock oscillator, 16
...D/A converter, 17...Low pass filter.
Claims (1)
用復調器に接続される発振器とを有し、ＣＷの電
鍵によりＣＷ用サイドトーン発振器からの出力を
断続した信号と、ＳＳＢモニター用復調器からの
出力信号をアンプによつて増幅し、スピーカによ
つてＣＷ及びＳＳＢ送信信号をモニターするモニ
ター回路において、 前記ＳＳＢモニター用復調器に接続される発振
器の替りに発振周波数範囲が広範囲なダイレクト
デジタルシンセサイザ（以下ＤＤＳと呼ぶ）を設
け、このＤＤＳ出力信号を直接ＣＷ用サイドトー
ンモニター回路に接続すること、ＣＷ用サイドト
ーン発振器を不要とするように構成したことを特
徴とするモニター回路。[Claim for Utility Model Registration] A signal comprising a CW sidetone oscillator and an oscillator connected to an SSB monitor demodulator, and a signal in which the output from the CW sidetone oscillator is intermittent by a CW electric key, and an SSB monitor. In a monitor circuit that amplifies the output signal from the SSB demodulator with an amplifier and monitors CW and SSB transmission signals with a speaker, the oscillation frequency range is wide in place of the oscillator connected to the SSB monitor demodulator. A monitor circuit characterized in that a direct digital synthesizer (hereinafter referred to as DDS) is provided, the DDS output signal is directly connected to a CW sidetone monitor circuit, and the CW sidetone oscillator is not required. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990100953U JP2514973Y2 (en) | 1990-09-28 | 1990-09-28 | Monitor circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990100953U JP2514973Y2 (en) | 1990-09-28 | 1990-09-28 | Monitor circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0459650U true JPH0459650U (en) | 1992-05-21 |
| JP2514973Y2 JP2514973Y2 (en) | 1996-10-23 |
Family
ID=31844001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990100953U Expired - Lifetime JP2514973Y2 (en) | 1990-09-28 | 1990-09-28 | Monitor circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2514973Y2 (en) |
-
1990
- 1990-09-28 JP JP1990100953U patent/JP2514973Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2514973Y2 (en) | 1996-10-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |