JPS56137257A - Measuring device of dropout depth - Google Patents

Measuring device of dropout depth

Info

Publication number
JPS56137257A
JPS56137257A JP4133280A JP4133280A JPS56137257A JP S56137257 A JPS56137257 A JP S56137257A JP 4133280 A JP4133280 A JP 4133280A JP 4133280 A JP4133280 A JP 4133280A JP S56137257 A JPS56137257 A JP S56137257A
Authority
JP
Japan
Prior art keywords
value
dropout
register
depth
vth
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
Application number
JP4133280A
Other languages
Japanese (ja)
Inventor
Tamihei Hiramatsu
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP4133280A priority Critical patent/JPS56137257A/en
Publication of JPS56137257A publication Critical patent/JPS56137257A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

PURPOSE:To record the depth of dropout by a method wherein, after a crest value is adjusted by an A-D converter, the lowest value is detected by comparing the values with a comparator and written in a register. CONSTITUTION:A signal having a certain amplitude is recorded in a magnetic tape 1 and, if there is any dropout, the envelope of the crest value of a regenerative signal S drops to the bottom level. The crest value Vi adjusted through A-D convertor 5 is compared 7 with the specified value VTH. When Vi<VTH, the present crest value Vi is compared 7 with the crest value Vi-i, or the value one step before, to be added by the register 9. When Vi<Vi-i, the content of the register 9 is renewed to become Vi. When Vi>Vi-i, the output of the comparator 8 turns to become ''1'', and the register 9 maintains that content. In addition, when the dropout is terminated, permitting Vi>VTH, the depth of the dropout value maintained in the register 9 is transferred to a memory 12 and recorded therein.
JP4133280A 1980-03-31 1980-03-31 Measuring device of dropout depth Pending JPS56137257A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4133280A JPS56137257A (en) 1980-03-31 1980-03-31 Measuring device of dropout depth

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4133280A JPS56137257A (en) 1980-03-31 1980-03-31 Measuring device of dropout depth

Publications (1)

Publication Number Publication Date
JPS56137257A true JPS56137257A (en) 1981-10-27

Family

ID=12605559

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4133280A Pending JPS56137257A (en) 1980-03-31 1980-03-31 Measuring device of dropout depth

Country Status (1)

Country Link
JP (1) JPS56137257A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60105975A (en) * 1983-11-15 1985-06-11 Diafoil Co Ltd Dropout measuring apparatus
JPH069326U (en) * 1992-07-02 1994-02-04 株式会社野口ハードウェアー Electric cord threader

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60105975A (en) * 1983-11-15 1985-06-11 Diafoil Co Ltd Dropout measuring apparatus
JPH0554074B2 (en) * 1983-11-15 1993-08-11 Diafoil Hoechst Co Ltd
JPH069326U (en) * 1992-07-02 1994-02-04 株式会社野口ハードウェアー Electric cord threader

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