JPS6387938U - - Google Patents
Info
- Publication number
- JPS6387938U JPS6387938U JP1986181834U JP18183486U JPS6387938U JP S6387938 U JPS6387938 U JP S6387938U JP 1986181834 U JP1986181834 U JP 1986181834U JP 18183486 U JP18183486 U JP 18183486U JP S6387938 U JPS6387938 U JP S6387938U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- fundamental frequency
- frequency
- fundamental
- 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 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
Landscapes
- Data Exchanges In Wide-Area Networks (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
Description
第１図は本考案の一実施例の回路図、第２図は
網制御回路のブロツク図、第３図は第１図の基本
周波数検出回路のブロツク図、第４図は本考案の
一実施例のタイムチヤート、第５図は本考案のカ
ウンター及びｆ１〜ｆ７制御回路のタイムチヤー
トである。
１…モデム回路、２…トランス、３…網制御回
路、５…端子台、６…極性反転検出回路、７…ｃ
ｉ信号検出回路、８…ＰＢ信号送出回路、９…Ｐ
Ｂ信号制御回路、１０…基本周波数指定スイツチ
、１１…ＰＢ信号発生回路、１２…テスト用リレ
ー、１３…信号ａａ′、１４…基本周波数検出回
路、１５…ゲート、１６…Ｌ１、１７…信号ｃ〜
ｃ′、１８…交流直流化回路、９…クロツク、２
０…デイジタル信号、２１…カウンター、２２…
ｆ１〜ｆ７制御回路、２３…信号ｆ１、２３′…
の信号ｆ１′〜ｆ７′、２４…ゲート。
Figure 1 is a circuit diagram of an embodiment of the present invention, Figure 2 is a block diagram of a network control circuit, Figure 3 is a block diagram of the fundamental frequency detection circuit of Figure 1, and Figure 4 is an implementation of the present invention. An example time chart, FIG. 5, is a time chart of the counter and f 1 to f 7 control circuit of the present invention. DESCRIPTION OF SYMBOLS 1...Modem circuit, 2...Transformer, 3...Network control circuit, 5...Terminal block, 6...Polarity reversal detection circuit, 7...c
i signal detection circuit, 8...PB signal sending circuit, 9...P
B signal control circuit, 10... Basic frequency designation switch, 11... PB signal generation circuit, 12... Test relay, 13... Signal aa', 14... Fundamental frequency detection circuit, 15... Gate, 16... L1, 17... Signal c ~
c', 18... AC/DC conversion circuit, 9... Clock, 2
0...Digital signal, 21...Counter, 22...
f1 to f7 control circuit, 23...signal f1 , 23'...
Signals f 1 ′ to f 7 ′, 24...gate.
Claims (1)
基本周波数を指示により送出可能な網制御装置に
おいて、送出された基本周波数を検出する回路を
設けることにより周波数の検出を可能とする事を
特徴とするＰＢ信号用基本周波数の自己テスト回
路。 A network control device capable of transmitting the fundamental frequency of a PB signal, which is a modulated signal of two fundamental frequencies, upon instruction, characterized in that the frequency can be detected by providing a circuit for detecting the transmitted fundamental frequency. Self-test circuit for fundamental frequency of PB signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986181834U JPS6387938U (en) | 1986-11-28 | 1986-11-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986181834U JPS6387938U (en) | 1986-11-28 | 1986-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6387938U true JPS6387938U (en) | 1988-06-08 |
Family
ID=31127070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986181834U Pending JPS6387938U (en) | 1986-11-28 | 1986-11-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6387938U (en) |
-
1986
- 1986-11-28 JP JP1986181834U patent/JPS6387938U/ja active Pending
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