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JPS5567917A - Optimum recording bias detecting method of magnetic recording and reproducing device - Google Patents

Optimum recording bias detecting method of magnetic recording and reproducing device

Info

Publication number
JPS5567917A
JPS5567917A JP14146978A JP14146978A JPS5567917A JP S5567917 A JPS5567917 A JP S5567917A JP 14146978 A JP14146978 A JP 14146978A JP 14146978 A JP14146978 A JP 14146978A JP S5567917 A JPS5567917 A JP S5567917A
Authority
JP
Japan
Prior art keywords
recording
bias current
processor
sequentially
reproducing device
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.)
Granted
Application number
JP14146978A
Other languages
Japanese (ja)
Other versions
JPS633364B2 (en
Inventor
Tsunao Hasegawa
Yasushi Otake
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 JP14146978A priority Critical patent/JPS5567917A/en
Publication of JPS5567917A publication Critical patent/JPS5567917A/en
Publication of JPS633364B2 publication Critical patent/JPS633364B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To make it possible to detect automatically the best value of a recording bias current corresponding to various tapes by selectively detecting the bias current varying in steps within a fixed range where a reproduced output to be stored in a memory is the greatest.
CONSTITUTION: To a recording signal with its level value fixed through recording level setting circuit 4, a bias current varying sequentially by steps is applied through processor 18 for recording on magnetic tape 7. After this tape 7 is run backward through processor 18 until its marker is detected, a reproduction output from an initial recording position is sequentially compared by D/A converter 17 and comparator 16 to obtain a digital signal, which is sequentially stored at a fixed address of processor 18. Then, processor 18 detect the largest value of the reproduction outputs and selects a bias current equivalent to this reproduction output to detect automatically the best bias current values for various tapes.
COPYRIGHT: (C)1980,JPO&Japio
JP14146978A 1978-11-16 1978-11-16 Optimum recording bias detecting method of magnetic recording and reproducing device Granted JPS5567917A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14146978A JPS5567917A (en) 1978-11-16 1978-11-16 Optimum recording bias detecting method of magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14146978A JPS5567917A (en) 1978-11-16 1978-11-16 Optimum recording bias detecting method of magnetic recording and reproducing device

Publications (2)

Publication Number Publication Date
JPS5567917A true JPS5567917A (en) 1980-05-22
JPS633364B2 JPS633364B2 (en) 1988-01-23

Family

ID=15292600

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14146978A Granted JPS5567917A (en) 1978-11-16 1978-11-16 Optimum recording bias detecting method of magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS5567917A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0361621U (en) * 1989-10-17 1991-06-17
US6040564A (en) * 1995-10-04 2000-03-21 Matsushita Electric Indutrial Co., Ltd. Microwave heating apparatus and microwave heating method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0361621U (en) * 1989-10-17 1991-06-17
US6040564A (en) * 1995-10-04 2000-03-21 Matsushita Electric Indutrial Co., Ltd. Microwave heating apparatus and microwave heating method

Also Published As

Publication number Publication date
JPS633364B2 (en) 1988-01-23

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