JPS5548818A - Detection method of optimum recording bias for magnetic recording and reproducing unit - Google Patents
Detection method of optimum recording bias for magnetic recording and reproducing unitInfo
- Publication number
- JPS5548818A JPS5548818A JP12289978A JP12289978A JPS5548818A JP S5548818 A JPS5548818 A JP S5548818A JP 12289978 A JP12289978 A JP 12289978A JP 12289978 A JP12289978 A JP 12289978A JP S5548818 A JPS5548818 A JP S5548818A
- Authority
- JP
- Japan
- Prior art keywords
- bias
- recording
- signal
- recording bias
- level
- 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
Links
Abstract
PURPOSE: To automatically detect the optimum recording bias by sweeping the recording bias through the recording level set to a given level.
CONSTITUTION: After setting the recording bias to the standard level, the recording bias is sequentially changed between the upper and lower limits to sweep and the end signal is produced at the end. Further, the reproducing level corresponding to each of the recording bias is stored in the RAM 21. Further, in response to the end signal, the computer 20 performs discrimination and operational processing by using the reproducting signal level stored to detect the maximum value M. Further, the number of times in which the reproducing signal level is equal to the value M is detected and if the number of times is more than a given number, e.g., 3, the discrimination signal is produced. Next, in response to this discrimination signal, the recording bias corresponding to the first reproducing signal among the number of times of production, is taken as the optimum recording bias. Thus, the optimum bias can automatically be detected.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12289978A JPS601687B2 (en) | 1978-10-04 | 1978-10-04 | Optimal recording bias detection method for magnetic recording and playback equipment |
DE19792940974 DE2940974A1 (en) | 1978-03-01 | 1979-03-01 | MAGNETIC RECORDER / REPRODUCER |
PCT/JP1979/000051 WO1979000715A1 (en) | 1978-03-01 | 1979-03-01 | Magnetic recorder/reproducer |
GB08218010A GB2102616B (en) | 1978-03-01 | 1979-03-01 | Magnetic recording and reproducing device |
GB8009444A GB2040100B (en) | 1978-03-01 | 1979-03-01 | Magnetic recorder reproducer |
US06/315,337 US4405953A (en) | 1978-03-01 | 1981-10-26 | Magnetic recording and reproducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12289978A JPS601687B2 (en) | 1978-10-04 | 1978-10-04 | Optimal recording bias detection method for magnetic recording and playback equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5548818A true JPS5548818A (en) | 1980-04-08 |
JPS601687B2 JPS601687B2 (en) | 1985-01-17 |
Family
ID=14847368
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12289978A Expired JPS601687B2 (en) | 1978-03-01 | 1978-10-04 | Optimal recording bias detection method for magnetic recording and playback equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS601687B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5069323A (en) * | 1988-10-12 | 1991-12-03 | Kabushiki Kaisha Daiken Seisakusho | Release bearing including replaceable bush |
-
1978
- 1978-10-04 JP JP12289978A patent/JPS601687B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5069323A (en) * | 1988-10-12 | 1991-12-03 | Kabushiki Kaisha Daiken Seisakusho | Release bearing including replaceable bush |
Also Published As
Publication number | Publication date |
---|---|
JPS601687B2 (en) | 1985-01-17 |
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