JPS5548817A - 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
- JPS5548817A JPS5548817A JP12289678A JP12289678A JPS5548817A JP S5548817 A JPS5548817 A JP S5548817A JP 12289678 A JP12289678 A JP 12289678A JP 12289678 A JP12289678 A JP 12289678A JP S5548817 A JPS5548817 A JP S5548817A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- level
- bias
- recording bias
- 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.)
- 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 the recording bias set circuit 8 is set to the standard level of tape, the recording level set circuit 4 is controlled with the control output of the decoder 19 and to recording level is set so that the repeoducing signal level is the standard level. The recording bias set circuit 8 sequentially changes the recording bias between the upper and lower limits with the control signal of the decoder 9 by receiving the signal for the end of set. The maximum value of the reproducing level in this case is obtained and the recording bias corresponding to this is taken as the optimum recording bias. Further, this is made under the control of the computer 20. Thus, the optimum recording bias to various tapes can automatically be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12289678A JPS6019565B2 (en) | 1978-10-04 | 1978-10-04 | Optimal recording bias detection method for magnetic recording and playback equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12289678A JPS6019565B2 (en) | 1978-10-04 | 1978-10-04 | Optimal recording bias detection method for magnetic recording and playback equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5548817A true JPS5548817A (en) | 1980-04-08 |
| JPS6019565B2 JPS6019565B2 (en) | 1985-05-16 |
Family
ID=14847300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12289678A Expired JPS6019565B2 (en) | 1978-10-04 | 1978-10-04 | Optimal recording bias detection method for magnetic recording and playback equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6019565B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6375996A (en) * | 1986-09-19 | 1988-04-06 | 株式会社日立製作所 | Sheet paper handler |
| JPS63258381A (en) * | 1987-04-16 | 1988-10-25 | 北原 一孝 | Controller for position of stoppage of elevator |
-
1978
- 1978-10-04 JP JP12289678A patent/JPS6019565B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6019565B2 (en) | 1985-05-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20041214 |
|
| A601 | Written request for extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A601 Effective date: 20050310 |
|
| A602 | Written permission of extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A602 Effective date: 20050425 |
|
| A711 | Notification of change in applicant |
Effective date: 20050516 Free format text: JAPANESE INTERMEDIATE CODE: A711 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050613 |
|
| A02 | Decision of refusal |
Effective date: 20050809 Free format text: JAPANESE INTERMEDIATE CODE: A02 |
|
| A02 | Decision of refusal |
Effective date: 20050913 Free format text: JAPANESE INTERMEDIATE CODE: A02 |