JPS5545131A - Magnetic recording and reproducing device - Google Patents

Magnetic recording and reproducing device

Info

Publication number
JPS5545131A
JPS5545131A JP11790278A JP11790278A JPS5545131A JP S5545131 A JPS5545131 A JP S5545131A JP 11790278 A JP11790278 A JP 11790278A JP 11790278 A JP11790278 A JP 11790278A JP S5545131 A JPS5545131 A JP S5545131A
Authority
JP
Japan
Prior art keywords
reference signal
recording
memory
bias
value
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
JP11790278A
Other languages
Japanese (ja)
Inventor
Toru Sanbe
Naoya Fujita
Masamichi Yamada
Shigemitsu Higuchi
Koichi Tomatsuri
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11790278A priority Critical patent/JPS5545131A/en
Priority to DE2938937A priority patent/DE2938937C2/en
Publication of JPS5545131A publication Critical patent/JPS5545131A/en
Priority to US06/390,884 priority patent/US4422109A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain constantly the best bias and compensation characteristics for a tape to be used by setting the best bias value by recording and reproducing a reference signal while changing a bias current in step, and then by finely controlling a recording gain and recording compensation characteristics by recording and reproducing several reference signals differing in frequency.
CONSTITUTION: A reference signal of 5KHz outputted by reference signal generator 11 is recorded and reproduced and the reproduction output is applied to operator 19 through A/D converter 18. On the other hand, bias oscillator 3 is controlled in step through control circuit 21 to control a bias current to the best value and corresponding control data are stored in memory 20. Next, gain circuit 8 is similarly changed is step by a reference signal of 11KHz in frequency on the basis of the memory contents of memory 20 to compensate the sensitivity of a tape corresponding to its kind and this control data is stored in memory 20 and used as a reference value for subsequent similar compensation by an intermediate and high-band reference signal.
COPYRIGHT: (C)1980,JPO&Japio
JP11790278A 1978-09-27 1978-09-27 Magnetic recording and reproducing device Pending JPS5545131A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP11790278A JPS5545131A (en) 1978-09-27 1978-09-27 Magnetic recording and reproducing device
DE2938937A DE2938937C2 (en) 1978-09-27 1979-09-26 Adjustment device and method for a magnetic tape recorder and reproducer
US06/390,884 US4422109A (en) 1978-09-27 1982-06-22 Magnetic recording and reproducing apparatus automatically adjustable to each individual magnetic tape

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11790278A JPS5545131A (en) 1978-09-27 1978-09-27 Magnetic recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS5545131A true JPS5545131A (en) 1980-03-29

Family

ID=14723022

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11790278A Pending JPS5545131A (en) 1978-09-27 1978-09-27 Magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS5545131A (en)

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