JPS56105354A - Reproducing signal level detection system - Google Patents

Reproducing signal level detection system

Info

Publication number
JPS56105354A
JPS56105354A JP855880A JP855880A JPS56105354A JP S56105354 A JPS56105354 A JP S56105354A JP 855880 A JP855880 A JP 855880A JP 855880 A JP855880 A JP 855880A JP S56105354 A JPS56105354 A JP S56105354A
Authority
JP
Japan
Prior art keywords
level
signal
frequency
reproducing
preamplifier
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
JP855880A
Other languages
Japanese (ja)
Inventor
Seisuke Hirakuri
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan 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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP855880A priority Critical patent/JPS56105354A/en
Publication of JPS56105354A publication Critical patent/JPS56105354A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/1808—Driving of both record carrier and head

Landscapes

  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)

Abstract

PURPOSE:To detect the level of the reproducing FM signal accurately, by taking out frequency components corresponding to the level at the leading edge of the synchronizing signal of the reproduced FM signal and by detecting their level. CONSTITUTION:The FM composite video signal obtained from rotary head 1 is amplified by preamplifier 2 and is demodulated by FM demodulator 3 and is supplied to output circuit 5 through LPF4. The signal amplified by preamplifier 2 is supplied to band amplifier 9, and the carrier frequency corresponding to the level at the leading edge of the synchronizing signal of a prescribed fixed frequency and the frequency near this carrier frequency are separated and are given to level detector 10. Detector 10 detects the level of the part corresponding to the synchronizing signal of the FM reproducing signal and applies this level as the track slippage detection signal of the level corresponding to track slippage to a prescribed tracking servo-circuit through switch 11.
JP855880A 1980-01-28 1980-01-28 Reproducing signal level detection system Pending JPS56105354A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP855880A JPS56105354A (en) 1980-01-28 1980-01-28 Reproducing signal level detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP855880A JPS56105354A (en) 1980-01-28 1980-01-28 Reproducing signal level detection system

Publications (1)

Publication Number Publication Date
JPS56105354A true JPS56105354A (en) 1981-08-21

Family

ID=11696426

Family Applications (1)

Application Number Title Priority Date Filing Date
JP855880A Pending JPS56105354A (en) 1980-01-28 1980-01-28 Reproducing signal level detection system

Country Status (1)

Country Link
JP (1) JPS56105354A (en)

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