JPS5733425A - Testing device for electromagnetic conversion characteristic of magnetic head - Google Patents

Testing device for electromagnetic conversion characteristic of magnetic head

Info

Publication number
JPS5733425A
JPS5733425A JP10894880A JP10894880A JPS5733425A JP S5733425 A JPS5733425 A JP S5733425A JP 10894880 A JP10894880 A JP 10894880A JP 10894880 A JP10894880 A JP 10894880A JP S5733425 A JPS5733425 A JP S5733425A
Authority
JP
Japan
Prior art keywords
signal
conversion
head
electromagnetic conversion
frequency
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
JP10894880A
Other languages
Japanese (ja)
Other versions
JPS6367252B2 (en
Inventor
Kazumasa Doi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP10894880A priority Critical patent/JPS5733425A/en
Publication of JPS5733425A publication Critical patent/JPS5733425A/en
Publication of JPS6367252B2 publication Critical patent/JPS6367252B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To increase the measuring accuracy of the reproducing level, by performing a DC conversion after detecting the difference between the maximum and minimum values of a frequency conversion signal. CONSTITUTION:A reference signal fs is produced 3 to measure the electromagnetic conversion characteristics of a test head 1, and both the frequency and the level of the signal fs are varied 4 in steps. An auxiliary reference signal fp whose phase to the signal fs shifts in a certain speed and in coupling to the frequency change of the signal fs is produced 7, and the signal fp is divided 9. Then both the signals fs and fp are recorded alternately to the head 1. Furthermore the signal fp among the reproduced signals of the head 1 is detected 11; while the signal fs is sampled and held 15. Then the peak value is detected 18 for the output of a circuit 15 to obtain the DC voltage. This voltage receives a digital conversion 24.
JP10894880A 1980-08-07 1980-08-07 Testing device for electromagnetic conversion characteristic of magnetic head Granted JPS5733425A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10894880A JPS5733425A (en) 1980-08-07 1980-08-07 Testing device for electromagnetic conversion characteristic of magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10894880A JPS5733425A (en) 1980-08-07 1980-08-07 Testing device for electromagnetic conversion characteristic of magnetic head

Publications (2)

Publication Number Publication Date
JPS5733425A true JPS5733425A (en) 1982-02-23
JPS6367252B2 JPS6367252B2 (en) 1988-12-23

Family

ID=14497698

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10894880A Granted JPS5733425A (en) 1980-08-07 1980-08-07 Testing device for electromagnetic conversion characteristic of magnetic head

Country Status (1)

Country Link
JP (1) JPS5733425A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0233715A (en) * 1988-07-23 1990-02-02 Kenwood Corp Envelope meter for dat

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0233715A (en) * 1988-07-23 1990-02-02 Kenwood Corp Envelope meter for dat
JPH0544092B2 (en) * 1988-07-23 1993-07-05 Kenwood Corp

Also Published As

Publication number Publication date
JPS6367252B2 (en) 1988-12-23

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