JPS58187038A - Automatic folding tester - Google Patents
Automatic folding testerInfo
- Publication number
- JPS58187038A JPS58187038A JP57070945A JP7094582A JPS58187038A JP S58187038 A JPS58187038 A JP S58187038A JP 57070945 A JP57070945 A JP 57070945A JP 7094582 A JP7094582 A JP 7094582A JP S58187038 A JPS58187038 A JP S58187038A
- Authority
- JP
- Japan
- Prior art keywords
- receiver
- signal
- oscillator
- output
- folding test
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/60—Supervising unattended repeaters
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、送受信装置の受信機の異常状態が受信機の故
障による本のか、またはフェージングによるものかを自
動的に検出するためK、近接して存在する他の送受信装
置の送信機の送信信号を目的とする受信機に折り返すこ
とKよって確認試験を行なう自動折り返し試験器に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention automatically detects whether an abnormal state in a receiver of a transmitting/receiving device is due to a failure of the receiver or due to fading. The present invention relates to an automatic loopback tester that performs a confirmation test by loopbacking a transmitted signal from a transmitter of a device to a target receiver.
従来、この種の自動折り返し試験器は受信信号の異常状
態が検出される度毎に折り返し試験動作を行なっていた
。そのため送受信装置の受信機が正常であるにも拘らず
、7工−ジング多発時にけフェージングが起る度毎に回
線を断にする欠点があった。Conventionally, this type of automatic loopback tester has performed a loopback test operation every time an abnormal state of a received signal is detected. Therefore, even though the receiver of the transmitting/receiving device is normal, there is a drawback that the line is disconnected every time fading occurs due to frequent occurrence of processing.
本発明の目的は受信信号の異常状態が噴出され、一度折
り返し試験動作を行った後は一定時間折り返し試験動作
を停止することKより1回線断発生頻度を最小限に抑え
た自動折り返し試験器を提供することKある。The purpose of the present invention is to provide an automatic loopback tester that minimizes the frequency of line disconnections by stopping the loopback test operation for a certain period of time after the loopback test operation is performed once an abnormal state of the received signal occurs. I have a lot to offer.
前記目的を達成するために本発明による自動折り返し試
験器は送受信@胃の受信機の異常状態を自動的に検出す
る自動折り返し試験器において、所定周波数の発振器と
、前記発振器の発振周波数と他の送受信装置の送信信号
より受信信号と同じ周波数を発生するシフタと、前記シ
フタの受信信号と同じ周波数を通し、他の不要周波数を
除去するろ波器と、スタンバイ状態において受信機異常
検出信号を受は九場合、前記発振器を駆動させ、前記ろ
波器より出力された折り返し信号により受信機を試験し
、その結果、受信機の出力端まで折り返し信号が出力さ
れたとき、一定時間折り返し試験を停止し、受信機の出
力端まで折り返し信号が出力され々いとき、受信機に故
障があると判別する論理回路とから構成しである。To achieve the above object, the automatic loopback tester according to the present invention automatically detects an abnormal state of a transmitting/receiving receiver. A shifter that generates the same frequency as the received signal from the transmitted signal of the transmitter/receiver, a filter that passes the same frequency as the received signal of the shifter and removes other unnecessary frequencies, and receives a receiver abnormality detection signal in a standby state. In 9 cases, the oscillator is driven and the receiver is tested using the return signal output from the filter, and as a result, when the return signal is output to the output end of the receiver, the return test is stopped for a certain period of time. However, it also includes a logic circuit that determines that there is a failure in the receiver when the folded signal is not output to the output end of the receiver.
以下、図面を参照して本発明の詳細な説明する。第1図
は本発明による自動折り返し試験器の一実施例を示す回
路図である。図において、4は他送受信装置の送信機、
lは受信機、8はカップラである。自動折り返し試験器
2は受信機1からの検出信号を受ける論理回路7、論理
回路出力に接続されてhる発掘器31発振器3の発振周
波数と前記送信信号により受信信号と同じ周波数の信号
を発生するシフタ5卦よびシフタ5出力如接続され、受
信信号と同じ周波数を受信機1側のカップラ8に供給す
るる波器6より構成されてbる。自動折り返し試験器2
は通常はスタンバイ状態になっており、受信機1が異常
になり、その検出信号が論理回路7に加えられると、論
理回路7は発振器3を駆動する。Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a circuit diagram showing an embodiment of an automatic folding tester according to the present invention. In the figure, 4 is a transmitter of another transmitting/receiving device;
1 is a receiver, and 8 is a coupler. The automatic loopback tester 2 includes a logic circuit 7 that receives the detection signal from the receiver 1, an excavator 31 connected to the output of the logic circuit, and a signal having the same frequency as the received signal based on the oscillation frequency of the oscillator 3 and the transmission signal. The output of the shifter 5 is connected to the output of the shifter 5 to supply the same frequency as the received signal to the coupler 8 on the side of the receiver 1. Automatic folding tester 2
is normally in a standby state, and when the receiver 1 becomes abnormal and its detection signal is applied to the logic circuit 7, the logic circuit 7 drives the oscillator 3.
シフタ5では前述のように送信信号とにより受信信号と
同じ周波数の信号が発生し、午の信号はる波器6、カッ
プラ8を介して受信機IK送出される。ここで、論理回
路7は受信機1の出力端まで前述の信号が出力された時
、受信機lは正常であると判別し、信号が出力されない
時は受信機lは故障であると判別する。論理回路7は受
信機lが正常である場合は一定時間折り返し試験を停止
する。ここで短時間にフェージングが頻繁に発生してい
るような場合は、最初のフェージングが原因で異常が噴
出されるので、上述のように折り返し試験器2は受信機
lの異常状陣を判別した後、一定時間折り返し試験を停
+Ll、、その間にフェージングが発生してモ折り返し
試験を行なわない。In the shifter 5, a signal having the same frequency as the received signal is generated by the transmitting signal as described above, and the signal is sent to the receiver IK via the pm signal transmitter 6 and the coupler 8. Here, the logic circuit 7 determines that the receiver 1 is normal when the above-mentioned signal is output to the output terminal of the receiver 1, and determines that the receiver 1 is malfunctioning when the signal is not output. . If the receiver l is normal, the logic circuit 7 stops the loopback test for a certain period of time. If fading occurs frequently in a short period of time, an abnormality will be emitted due to the first fading, so the loopback tester 2 discriminates the abnormal condition of receiver L as described above. After that, the loopback test is stopped for a certain period of time, during which time fading occurs and the loopback test is not performed.
以上の動作を第2図のフローチャート1によって説明す
る。The above operation will be explained with reference to flowchart 1 in FIG.
(a)スタンバイ状態にある自動折り返し試験器は、f
b)−回目の受信機の異常を検出し、その検出信号によ
り(C)発振器を駆動し折り1区し試験動作を行ない(
d)受信機の異常状態を判別し、(e)受信機が正常な
らば一定時間折り返し試験動作を停止させる。(fl一
定時間が過ぎると(alのスタンバイ状態へ自動的に戻
る。しだがって(e)の状態の時にフェージングが発生
しても折り返し動作試験は行なわれない。(a) The automatic loopback tester in standby state is f
b) Detect an abnormality in the -th receiver, drive the (C) oscillator with the detection signal, perform a test operation for one section, and (
d) Determine whether the receiver is in an abnormal state, and (e) if the receiver is normal, stop loop test operation for a certain period of time. (fl) After a certain period of time has passed, it automatically returns to the standby state of (al). Therefore, even if fading occurs in state (e), a return operation test is not performed.
以上詳しく説明したように本発明によれば、毎時間のフ
ェージングが頻繁に発生しても、自動折り返し試験器に
よって生じる回線断はなくなる効果がある。As explained in detail above, according to the present invention, even if hourly fading occurs frequently, there is no line disconnection caused by the automatic loopback tester.
第1図は本発明による自動折り返し試験器の一実施例と
送受信装置を組み合せた図、第2図は第1図の動作を説
明するためのフローチャートである。
l・・・受信機 2・・・自動折り返し試験器3・・
・発振器 4・・・送信機
5・・・シフタ 6・・・ろ波器
7・・・論理回路 8・・・カップラ
特許出願人 日本電気株式会社
代理人 弁理士 井 ノ ロ 壽
轡 2 図FIG. 1 is a diagram showing a combination of an embodiment of an automatic foldback tester according to the present invention and a transmitting/receiving device, and FIG. 2 is a flowchart for explaining the operation of FIG. 1. l...Receiver 2...Automatic return tester 3...
・Oscillator 4...Transmitter 5...Shifter 6...Filter 7...Logic circuit 8...Coupler Patent applicant NEC Corporation Representative Patent attorney Hisashi Inoro 2 Figure
Claims (1)
折り返し試験器にシいて、所定周波数の発振器と、前記
発県器の発撮周波数と他の送受信装置の送信信号より受
信信号と同じ周波数を発生するシックと、前記シフタの
受信信号と同じ周波数を通し、他の不要周波数を除去す
るろ波器と、スタンバイ状態lCおいて受信機異常検出
信号を受けた場合、前記発振器を駆動させ、前記ろ波器
より出力された折り返し信号により受信機を試験し、そ
の結果、受信機の出力端まで折り返し信号が出力された
とき、一定時間折り返し試験を停止し、受信機の出力端
まで折り返し信号が出力されないとき、受信機に故障が
あると判別する論理回路とから構成した自動折り返し試
験器。An automatic loopback tester that automatically detects abnormal conditions in the receiver of a transmitting/receiving device uses an oscillator with a predetermined frequency and a frequency equal to that of the received signal from the oscillating frequency of the oscillator and the transmitting signal of other transmitting/receiving devices. a filter that passes the same frequency as the received signal of the shifter and removes other unnecessary frequencies; and a filter that drives the oscillator when receiving a receiver abnormality detection signal in a standby state IC; The receiver is tested using the return signal output from the filter, and when the return signal is output to the output end of the receiver, the return test is stopped for a certain period of time, and the return signal is returned to the output end of the receiver. An automatic loopback tester consisting of a logic circuit that determines that there is a failure in the receiver when no signal is output.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57070945A JPS58187038A (en) | 1982-04-27 | 1982-04-27 | Automatic folding tester |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57070945A JPS58187038A (en) | 1982-04-27 | 1982-04-27 | Automatic folding tester |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58187038A true JPS58187038A (en) | 1983-11-01 |
Family
ID=13446143
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57070945A Pending JPS58187038A (en) | 1982-04-27 | 1982-04-27 | Automatic folding tester |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58187038A (en) |
-
1982
- 1982-04-27 JP JP57070945A patent/JPS58187038A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5781318A (en) | Circuit and method of testing for silent faults in a bi-directional optical communication system | |
AU635798B2 (en) | Optical fiber link control safety system | |
US6438285B1 (en) | Facility for intializing a fiber optic data link in one mode of a plurality of modes | |
KR930001814B1 (en) | Digital service unit | |
JPS58187038A (en) | Automatic folding tester | |
JPS59204333A (en) | Automatic return tester | |
JP2819601B2 (en) | Failure diagnosis method for communication systems | |
JP2555975B2 (en) | Communication line test method | |
JP3256256B2 (en) | Transmission monitoring device | |
KR0176401B1 (en) | Data receive circuit of loop back test | |
JPS60121836A (en) | Automatic return tester | |
JPH0646737B2 (en) | Safe and diagnosable anti-jaber communication circuit device and method | |
JPS5921146A (en) | Automatic folding tester | |
JPH11284551A (en) | One-way communication method from plural transmitters to single receiver | |
JPH1196088A (en) | Duplex constitution device | |
KR200153194Y1 (en) | Data service device equipped with checking | |
JPH02305037A (en) | Abnormality detecting system for data transmission system | |
JPH06188896A (en) | Fault monitoring device | |
JP2786122B2 (en) | Receiver with failure detection function | |
JPH046932A (en) | Line terminator | |
JP2537960B2 (en) | Optical interface circuit | |
JPS58151725A (en) | Duplex modulating circuit | |
JPS60183835A (en) | Input breaking circuit of repeater monitor and control signal | |
JPH07147564A (en) | Optical connection monitor | |
JPH08162938A (en) | Bus driver circuit |