JPS5558611A - Sector length check system - Google Patents

Sector length check system

Info

Publication number
JPS5558611A
JPS5558611A JP13162578A JP13162578A JPS5558611A JP S5558611 A JPS5558611 A JP S5558611A JP 13162578 A JP13162578 A JP 13162578A JP 13162578 A JP13162578 A JP 13162578A JP S5558611 A JPS5558611 A JP S5558611A
Authority
JP
Japan
Prior art keywords
sector
mark
length
check
check system
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
JP13162578A
Other languages
Japanese (ja)
Other versions
JPS6128191B2 (en
Inventor
Mitsugi Kamo
Toru Murai
Yoshio Yugawa
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP13162578A priority Critical patent/JPS5558611A/en
Publication of JPS5558611A publication Critical patent/JPS5558611A/en
Publication of JPS6128191B2 publication Critical patent/JPS6128191B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

PURPOSE:To check whether the sector signal of an arbitrary sector length exists or not by recording a specific mark, which precedes a sector mark by a fixed number of bits, separately from the sector mark. CONSTITUTION:The sector length of sector mark 1 to be checked is set arbitrarily according to use purposes of a unit. Check mark 2 is provided a fixed length before sector mark 1, and length from check mark 2 to sector mark 1 is counted by master clock 3, and it is checked whether the counted value agrees with a preset value or not, thus checking whether the sector signal exists or not.
JP13162578A 1978-10-27 1978-10-27 Sector length check system Granted JPS5558611A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13162578A JPS5558611A (en) 1978-10-27 1978-10-27 Sector length check system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13162578A JPS5558611A (en) 1978-10-27 1978-10-27 Sector length check system

Publications (2)

Publication Number Publication Date
JPS5558611A true JPS5558611A (en) 1980-05-01
JPS6128191B2 JPS6128191B2 (en) 1986-06-28

Family

ID=15062420

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13162578A Granted JPS5558611A (en) 1978-10-27 1978-10-27 Sector length check system

Country Status (1)

Country Link
JP (1) JPS5558611A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5821986A (en) * 1981-08-03 1983-02-09 Nippon Telegr & Teleph Corp <Ntt> Picture coding system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0481278U (en) * 1990-11-19 1992-07-15

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5821986A (en) * 1981-08-03 1983-02-09 Nippon Telegr & Teleph Corp <Ntt> Picture coding system

Also Published As

Publication number Publication date
JPS6128191B2 (en) 1986-06-28

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