JPS56160151A - Signal detecting system - Google Patents

Signal detecting system

Info

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
Application number
JP6332980A
Other languages
Japanese (ja)
Other versions
JPS6216587B2 (en
Inventor
Mitsuaki Naganuma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP6332980A priority Critical patent/JPS56160151A/en
Publication of JPS56160151A publication Critical patent/JPS56160151A/en
Publication of JPS6216587B2 publication Critical patent/JPS6216587B2/ja
Granted legal-status Critical Current

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.
JP6332980A 1980-05-15 1980-05-15 Signal detecting system Granted JPS56160151A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54126410A (en) * 1978-03-24 1979-10-01 Nec Corp Squelch circuit of fm communication unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
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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