JPS5798125A - Magnetic recorder and reproducer - Google Patents

Magnetic recorder and reproducer

Info

Publication number
JPS5798125A
JPS5798125A JP17440180A JP17440180A JPS5798125A JP S5798125 A JPS5798125 A JP S5798125A JP 17440180 A JP17440180 A JP 17440180A JP 17440180 A JP17440180 A JP 17440180A JP S5798125 A JPS5798125 A JP S5798125A
Authority
JP
Japan
Prior art keywords
recording
bias
playback output
signal
optimum
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
JP17440180A
Other languages
Japanese (ja)
Inventor
Takashi Nishida
Masao Ikeda
Shigemi Maeda
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP17440180A priority Critical patent/JPS5798125A/en
Publication of JPS5798125A publication Critical patent/JPS5798125A/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
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/027—Analogue recording
    • G11B5/035—Equalising

Abstract

PURPOSE:To set a recording equalizer, by comparing a playback output at an optimum recording bias current and at an arbitrary recording bias. CONSTITUTION:A moving terminal of a switch 3 is selected to a fixed terminal side 32, a signal in 1, 6, 12kHz is sequentially outputted from an oscillator 7, the bias at that time is swept to a saw-tooth wave with a sweeper 9, and recording is made. Next, the recording bias is kept constant and the said signal is sequentially introduced from the oscillator 7 for recording. Then, the tape is set the rewinding playback state. First, a peak value of each signal is detected, a playback output at a constant bias is read, and the playback output at the optimum recording bias is read. The recording level + at each frequency (playback output at a constant bias - playback output at optimum bias) is detected, the playback output of an equalizer signal is compared, and a control signal is applied to a recording equalizer circuit 8 with a lead wire (b).
JP17440180A 1980-12-09 1980-12-09 Magnetic recorder and reproducer Pending JPS5798125A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17440180A JPS5798125A (en) 1980-12-09 1980-12-09 Magnetic recorder and reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17440180A JPS5798125A (en) 1980-12-09 1980-12-09 Magnetic recorder and reproducer

Publications (1)

Publication Number Publication Date
JPS5798125A true JPS5798125A (en) 1982-06-18

Family

ID=15977925

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17440180A Pending JPS5798125A (en) 1980-12-09 1980-12-09 Magnetic recorder and reproducer

Country Status (1)

Country Link
JP (1) JPS5798125A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55122210A (en) * 1979-03-14 1980-09-19 Matsushita Electric Ind Co Ltd Magnetic recording and reproducing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55122210A (en) * 1979-03-14 1980-09-19 Matsushita Electric Ind Co Ltd Magnetic recording and reproducing device

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