JPS56169460A - Failure detector for code relay device - Google Patents
Failure detector for code relay deviceInfo
- Publication number
- JPS56169460A JPS56169460A JP7358880A JP7358880A JPS56169460A JP S56169460 A JPS56169460 A JP S56169460A JP 7358880 A JP7358880 A JP 7358880A JP 7358880 A JP7358880 A JP 7358880A JP S56169460 A JPS56169460 A JP S56169460A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- low frequency
- frequency component
- retrieval
- bit
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/24—Testing correct operation
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Dc Digital Transmission (AREA)
Abstract
PURPOSE:To increase the detecting accuracy of error rate, by supplying a retrieval code train identified and reproduced to an exclusive logical sum circit directly or via a delay circuit and detecting predetermined low frequency component from the output. CONSTITUTION:A retrieval pulse code in basic period n-bit recognized and reproduced at a relay device main body 13 is branched into two, and one is directly fed to one end of an exclusive logical sum circuit 17, and another is fed to another end of the circuit 17 through a delay circuit 18 making delay in the same n-bit as the basic period of n-bit of the retrieval code train. Further, the output of this circuit 17 is fed to a low frequency pickup circuit 19 to detect the low frequency component predetermined. For example, when A is switched in a specific period at the terminal station as the retrieval pulse code train, the repetitive frequency component is picked up and outputted to the low frequency pickup circuit 19, and if there is an error as shown in dotted lines in A, the reduction in the repetitive frequency component like C can be detected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7358880A JPS56169460A (en) | 1980-05-30 | 1980-05-30 | Failure detector for code relay device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7358880A JPS56169460A (en) | 1980-05-30 | 1980-05-30 | Failure detector for code relay device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56169460A true JPS56169460A (en) | 1981-12-26 |
Family
ID=13522614
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7358880A Pending JPS56169460A (en) | 1980-05-30 | 1980-05-30 | Failure detector for code relay device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56169460A (en) |
-
1980
- 1980-05-30 JP JP7358880A patent/JPS56169460A/en active Pending
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