JPS56119547A - Detecting circuit for breaking of signal and mark rate - Google Patents
Detecting circuit for breaking of signal and mark rateInfo
- Publication number
- JPS56119547A JPS56119547A JP2185880A JP2185880A JPS56119547A JP S56119547 A JPS56119547 A JP S56119547A JP 2185880 A JP2185880 A JP 2185880A JP 2185880 A JP2185880 A JP 2185880A JP S56119547 A JPS56119547 A JP S56119547A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- time constant
- integrating circuit
- generated
- alarm
- 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
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Dc Digital Transmission (AREA)
Abstract
PURPOSE:To independently determine the detection limit for breaking of signal through causing the limit of the detection mark rate to approach 0 and 1, by comparing the output of the integrating circuit, which has a time constant longer than that of the integrating circuit connected to retriggerable multivibrator, with the reference voltage. CONSTITUTION:When input signal 1 of pulse period t1 shorter than time constant CXRX of integrating circuit 14 is given to retriggerable multivibrator 11, Q' output signal 2 continues to be 0 and does not generate the alarm signal. When input signal 1 of pulse period t2 near time constant CXRX is given, output 2 repeates the operation of 0, 1 and averages them to generate the output signal, and pulse perior t2 becomes longer; and when it exceeds the threshold, alarm is generated. If instantaneous breaking sufficently longer than time constant R1C1 of integrating circuit 17 is generated in input signal 1, the alarm signal is generated when output signal 3 of integrating circuit 17 increases and exceeds the threshold voltage. If instantaneous break shorter than time constant R1C1 in the input signal, output signal 3 which does not reach the threshold voltage is reduced, and so alarm is not generated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2185880A JPS56119547A (en) | 1980-02-23 | 1980-02-23 | Detecting circuit for breaking of signal and mark rate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2185880A JPS56119547A (en) | 1980-02-23 | 1980-02-23 | Detecting circuit for breaking of signal and mark rate |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56119547A true JPS56119547A (en) | 1981-09-19 |
Family
ID=12066806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2185880A Pending JPS56119547A (en) | 1980-02-23 | 1980-02-23 | Detecting circuit for breaking of signal and mark rate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56119547A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5860843A (en) * | 1981-10-06 | 1983-04-11 | Natl Aerospace Lab | Fault judging circuit |
-
1980
- 1980-02-23 JP JP2185880A patent/JPS56119547A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5860843A (en) * | 1981-10-06 | 1983-04-11 | Natl Aerospace Lab | Fault judging circuit |
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