JPS56145507A - Magnetic recording and reproducing device - Google Patents
Magnetic recording and reproducing deviceInfo
- Publication number
- JPS56145507A JPS56145507A JP4682280A JP4682280A JPS56145507A JP S56145507 A JPS56145507 A JP S56145507A JP 4682280 A JP4682280 A JP 4682280A JP 4682280 A JP4682280 A JP 4682280A JP S56145507 A JPS56145507 A JP S56145507A
- Authority
- JP
- Japan
- Prior art keywords
- amplitude
- reproduction signal
- time
- signal
- test
- 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
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
Abstract
PURPOSE:To make automatic detection in the shortest time irrespective of the presence or absense or of a leader tape by providing a test signal oscillator and an amplitude detector for reproduction signal and performing automatic searching of a magnetic tape by the use of the amplitude of the reproduced test signal. CONSTITUTION:A low-frequency oscillator 9 for generating test signal and a reproduction signal amplitude detector 14 are provided. First, when the amplitude larger than the prescribed reproduction signal amplitude or equal thereto is obtained at the point of time when the recording and reproducing of the signal for test is started, the automatic searching for the characteristics of the tape is started immediately. When it is below the prescribed reproduction signal amplitude at the point of time when the recording and reproducing of the signal for test is started, the operation of detecting the reproduction signal amplitude is continued, and after lapse of a fixed time, the automatic searching is started from the point of time when the signal above the prescribed reproduction signal amplitude is obtained. If in this case the reproduction signal amplitude does not rise more than the determined amplitude despite lapse of the prescribed time, an alarm is made and the automatic searching does not take place. With such constitution, the automatic detection is made in the shortest time irrespective of the presence or absense of the leader tape.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4682280A JPS56145507A (en) | 1980-04-11 | 1980-04-11 | Magnetic recording and reproducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4682280A JPS56145507A (en) | 1980-04-11 | 1980-04-11 | Magnetic recording and reproducing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56145507A true JPS56145507A (en) | 1981-11-12 |
Family
ID=12758019
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4682280A Pending JPS56145507A (en) | 1980-04-11 | 1980-04-11 | Magnetic recording and reproducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56145507A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5936038U (en) * | 1982-08-30 | 1984-03-06 | パイオニア株式会社 | tape recorder |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5545130A (en) * | 1978-09-27 | 1980-03-29 | Hitachi Ltd | Magnetic recording and reproducing device |
-
1980
- 1980-04-11 JP JP4682280A patent/JPS56145507A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5545130A (en) * | 1978-09-27 | 1980-03-29 | Hitachi Ltd | Magnetic recording and reproducing device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5936038U (en) * | 1982-08-30 | 1984-03-06 | パイオニア株式会社 | tape recorder |
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