JPS5718068A - Detector of maximum recording level for magnetic tape - Google Patents

Detector of maximum recording level for magnetic tape

Info

Publication number
JPS5718068A
JPS5718068A JP9137880A JP9137880A JPS5718068A JP S5718068 A JPS5718068 A JP S5718068A JP 9137880 A JP9137880 A JP 9137880A JP 9137880 A JP9137880 A JP 9137880A JP S5718068 A JPS5718068 A JP S5718068A
Authority
JP
Japan
Prior art keywords
level
recording
output
signal
magnetic tape
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
JP9137880A
Other languages
Japanese (ja)
Inventor
Takao Kuwajima
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP9137880A priority Critical patent/JPS5718068A/en
Publication of JPS5718068A publication Critical patent/JPS5718068A/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
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing

Abstract

PURPOSE:To detect and display the maximum recording level of a magnetic tape automatically, by comparing the output levels of rectifier circuits 7, 10 with a comparator 11, for the detection of recording and reproduction levels. CONSTITUTION:A sinusoidal wave oscillating output 1 and a rectangular wave oscillation output 2 are applied to a level modulator 3, and modulation is made so that the level of the sinusoidal wave signal can be increased stepwise. This level modulation output is amplified with a recording amplifier 4 and supplied to a recording head 5 for recording to a magnetic tape 6. Further, the level modulation output is inputted to a rectifier smoothing circuit 7 via a resistor R1 and the level of the recording signal is detected. On the other hand, a signal reproduced with a playback head 8 is detected for the playback signal level with a rectifier smoothing circuit 10. The recording level output and the playback level signal output are compared 11 and when the difference between both levels exceeds a prescribed value, a comparison detecting signal is produced.
JP9137880A 1980-07-04 1980-07-04 Detector of maximum recording level for magnetic tape Pending JPS5718068A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9137880A JPS5718068A (en) 1980-07-04 1980-07-04 Detector of maximum recording level for magnetic tape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9137880A JPS5718068A (en) 1980-07-04 1980-07-04 Detector of maximum recording level for magnetic tape

Publications (1)

Publication Number Publication Date
JPS5718068A true JPS5718068A (en) 1982-01-29

Family

ID=14024700

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9137880A Pending JPS5718068A (en) 1980-07-04 1980-07-04 Detector of maximum recording level for magnetic tape

Country Status (1)

Country Link
JP (1) JPS5718068A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0283304A2 (en) * 1987-03-20 1988-09-21 Matsushita Electric Industrial Co., Ltd. Optical disc reproduction apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0283304A2 (en) * 1987-03-20 1988-09-21 Matsushita Electric Industrial Co., Ltd. Optical disc reproduction apparatus

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