JPS56160151A - Signal detecting system - Google Patents
Signal detecting systemInfo
- Publication number
- JPS56160151A JPS56160151A JP6332980A JP6332980A JPS56160151A JP S56160151 A JPS56160151 A JP S56160151A JP 6332980 A JP6332980 A JP 6332980A JP 6332980 A JP6332980 A JP 6332980A JP S56160151 A JPS56160151 A JP S56160151A
- Authority
- JP
- Japan
- Prior art keywords
- output
- level
- undesired wave
- amplifier
- signal
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/12—Arrangements for observation, testing or troubleshooting
- H04H20/14—Arrangements for observation, testing or troubleshooting for monitoring programmes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
- H04H60/04—Studio equipment; Interconnection of studios
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
PURPOSE:To satisfy the noise margin standard, by lowering the level of an undesired wave in case the undesired wave has been mixed into the band in which a piolt signal is used. CONSTITUTION:The output of a signal common amplifier 1b is applied to the signal detecting parts 2'-1-2'-n as well as to a rectifier 1c. With an input of an undesired wave, the DC output level of the rectifier 1c increases to generate an output from a level comparator 1d. The output of the comparator 1d is supplied to a variable gain amplifier 2-1b' to lower the gain of this amplifier. In such a way, the level of an undesired wave emerging at the output of a narrow band pass filter 2-1a is reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6332980A JPS56160151A (en) | 1980-05-15 | 1980-05-15 | Signal detecting system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6332980A JPS56160151A (en) | 1980-05-15 | 1980-05-15 | Signal detecting system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56160151A true JPS56160151A (en) | 1981-12-09 |
JPS6216587B2 JPS6216587B2 (en) | 1987-04-13 |
Family
ID=13226096
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6332980A Granted JPS56160151A (en) | 1980-05-15 | 1980-05-15 | Signal detecting system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56160151A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54126410A (en) * | 1978-03-24 | 1979-10-01 | Nec Corp | Squelch circuit of fm communication unit |
-
1980
- 1980-05-15 JP JP6332980A patent/JPS56160151A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54126410A (en) * | 1978-03-24 | 1979-10-01 | Nec Corp | Squelch circuit of fm communication unit |
Also Published As
Publication number | Publication date |
---|---|
JPS6216587B2 (en) | 1987-04-13 |
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