JPS5570914A - Detection method for optimum recording bias for magnetic recording and reproducing unit - Google Patents
Detection method for optimum recording bias for magnetic recording and reproducing unitInfo
- Publication number
- JPS5570914A JPS5570914A JP14505878A JP14505878A JPS5570914A JP S5570914 A JPS5570914 A JP S5570914A JP 14505878 A JP14505878 A JP 14505878A JP 14505878 A JP14505878 A JP 14505878A JP S5570914 A JPS5570914 A JP S5570914A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- signal
- bias
- recording bias
- reproducing
- 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 enable to detect the optimum recording bias, by using two signals for recording characteristics adjustment and keeping equal the both reproducing levels through the sequential comparison and adjustment for the both recording and reproducing signals.
CONSTITUTION: The control circuit 13 is operated with the depression of the start button, and the switch 1 is controlled and the low band signal fL is recorded and reproduced on the magnetic tape with recording bias fB, and then it is digital signal with the comparator 12 and the D/A converter 14 and stored in the memory 15. Next, high band signal fH is selected and recorded. This reproducing signal is compared with the reproduction level of fL stored before, and the control signal 101 is increased by 1 step with the reproduction level of reproduction level of signal fH> reproduction level of signal fL to deeper the recording bias. In reverse case, the recording bias is shallowed. Thus, the said steps are repeated until the both reproducing levels are equal to detect the optimum recording bias with fixed recording bias when equal.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14505878A JPS5570914A (en) | 1978-11-24 | 1978-11-24 | Detection method for optimum recording bias for magnetic recording and reproducing unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14505878A JPS5570914A (en) | 1978-11-24 | 1978-11-24 | Detection method for optimum recording bias for magnetic recording and reproducing unit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5570914A true JPS5570914A (en) | 1980-05-28 |
JPS6117042B2 JPS6117042B2 (en) | 1986-05-06 |
Family
ID=15376397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14505878A Granted JPS5570914A (en) | 1978-11-24 | 1978-11-24 | Detection method for optimum recording bias for magnetic recording and reproducing unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5570914A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58175112A (en) * | 1982-04-05 | 1983-10-14 | Akai Electric Co Ltd | Automatic bias adjusting method of magnetic recording and reproducing device |
-
1978
- 1978-11-24 JP JP14505878A patent/JPS5570914A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58175112A (en) * | 1982-04-05 | 1983-10-14 | Akai Electric Co Ltd | Automatic bias adjusting method of magnetic recording and reproducing device |
JPH0120485B2 (en) * | 1982-04-05 | 1989-04-17 | Akai Electric |
Also Published As
Publication number | Publication date |
---|---|
JPS6117042B2 (en) | 1986-05-06 |
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