JPS57188152A - Signal detector - Google Patents

Signal detector

Info

Publication number
JPS57188152A
JPS57188152A JP56073131A JP7313181A JPS57188152A JP S57188152 A JPS57188152 A JP S57188152A JP 56073131 A JP56073131 A JP 56073131A JP 7313181 A JP7313181 A JP 7313181A JP S57188152 A JPS57188152 A JP S57188152A
Authority
JP
Japan
Prior art keywords
signal
logical
section
pilot
output
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
Application number
JP56073131A
Other languages
Japanese (ja)
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 JP56073131A priority Critical patent/JPS57188152A/en
Publication of JPS57188152A publication Critical patent/JPS57188152A/en
Pending legal-status Critical Current

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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/1646—Circuits adapted for the reception of stereophonic signals
    • H04B1/1653—Detection of the presence of stereo signals and pilot signal regeneration
    • 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
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To prevent malfunction due to mixing of harmonics to a pilot signal, when a high peak level exists in an audio program signal. CONSTITUTION:When an audio program signal and a pilot signal are applied to an input terminal, the pilot signal passes through a signal common amplifier 1 consisting of a variable resistor attenuator 1a, a buffer circuit 1b, a band pass filter 1c, and a signal common amplifier 1d and is applied to signal detection sections 21-2n detecting individual pilot signals. Each output of the signal detection section passes through a logical circuit 3' of a signals detection logical section 6, a part is applied to logical circuits 111-117 of an output logical section directly and the rest passes through delay circuits 101-107 and is applied to the logical circuits 111-117. On the other hand, when the audio frequency components which are a half and 1/3 of the pilot frequency are detected at a program detector 8 with a level more than the reference level, an output is generated and a correction signal is generated at an output logic section 7 and the correction is made at a correction section 9.
JP56073131A 1981-05-14 1981-05-14 Signal detector Pending JPS57188152A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56073131A JPS57188152A (en) 1981-05-14 1981-05-14 Signal detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56073131A JPS57188152A (en) 1981-05-14 1981-05-14 Signal detector

Publications (1)

Publication Number Publication Date
JPS57188152A true JPS57188152A (en) 1982-11-19

Family

ID=13509340

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56073131A Pending JPS57188152A (en) 1981-05-14 1981-05-14 Signal detector

Country Status (1)

Country Link
JP (1) JPS57188152A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113395127A (en) * 2021-07-13 2021-09-14 伟乐视讯科技股份有限公司 Emergency broadcast RDS modulation degree test method and system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113395127A (en) * 2021-07-13 2021-09-14 伟乐视讯科技股份有限公司 Emergency broadcast RDS modulation degree test method and system
CN113395127B (en) * 2021-07-13 2022-03-18 伟乐视讯科技股份有限公司 Emergency broadcast RDS modulation degree test method and system

Similar Documents

Publication Publication Date Title
JPS5733834A (en) Frequency modulation noise reducing circuit
TW338871B (en) Pre-emphasis network with variable time delay
NO20000136L (en) Wake-up circuit for an electronic device
KR950022041A (en) Pulse noise canceller in FM tuner
JPS57188152A (en) Signal detector
KR840005289A (en) Protection circuit for AM stereo receiver
FR2385100A1 (en) Measuring signal noise suppression circuit - has non-linear transfer device with variable null zone in signal path
DE3277514D1 (en) Signal receiver and its utilization in a receiving circuit indicating the condition of the connected equipment
JPS55147847A (en) Receiving system having other station's signal elimination function
JPS57155852A (en) Stereo reproducing device
JPS57170617A (en) Receiver
JPS51145256A (en) Signal detecting circuit
JPS5585228A (en) Musical sound analyzer
ES475021A1 (en) Record noise suppression system
JPS57164605A (en) Amplifier
JPS57100362A (en) Ultrasonic wave measuring device
KR100224697B1 (en) Mute circuit for wireless headphone
JPS57162541A (en) Optical pulse receiver
JPS57188163A (en) Signal discriminator
JPS5440016A (en) Fail soft receiving high frequency amplifier
JPS5419623A (en) Digital input circuit
JPS564953A (en) Error detector for voice transmission
JPS56137720A (en) Receiving circuit for amplitude-modulated wave
JPS54157018A (en) Fm receiver
JPS56122244A (en) Signal intensity detecting circuit