JPS6446268A - Radial modulation inspecting device - Google Patents

Radial modulation inspecting device

Info

Publication number
JPS6446268A
JPS6446268A JP20273187A JP20273187A JPS6446268A JP S6446268 A JPS6446268 A JP S6446268A JP 20273187 A JP20273187 A JP 20273187A JP 20273187 A JP20273187 A JP 20273187A JP S6446268 A JPS6446268 A JP S6446268A
Authority
JP
Japan
Prior art keywords
track
sector
average output
output value
value
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
JP20273187A
Other languages
Japanese (ja)
Inventor
Fumio Takahashi
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP20273187A priority Critical patent/JPS6446268A/en
Publication of JPS6446268A publication Critical patent/JPS6446268A/en
Pending legal-status Critical Current

Links

Landscapes

  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

PURPOSE:To detect a partial modulation in a track by comparing the size of the absolute value of the difference in the sector average output value of the same sector as an adjoining track and a value obtained by applying a test level to a track average output value inspected immediately before the track of an inspection object. CONSTITUTION:A sector average output measuring part 5 executes two-point sampling L quantization per sector for an envelope signal (b), adds the obtained value, divides the number of the times of sampling by two, obtains a sector average output value (e) and outputs it to a sector average output storing part 6 and a deciding part 7. The deciding part 7, each time the sector average output value (e) of respective sectors of an M track is inputted, decides that an output value SWM, the SVM-1 of the sector average output value of the same sector as an M-1 track-stored in the sector average output storing part 6, the TVM-1 of the track average output value of an M-1 track stored in a track average output storing part 4 and a sector to satisfy the expression TVM-1Xx¦SVM-1-SVM¦ from a text level (x) are normal and outputs the result. Thus, the modulation at any part in the track can be detected.
JP20273187A 1987-08-14 1987-08-14 Radial modulation inspecting device Pending JPS6446268A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20273187A JPS6446268A (en) 1987-08-14 1987-08-14 Radial modulation inspecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20273187A JPS6446268A (en) 1987-08-14 1987-08-14 Radial modulation inspecting device

Publications (1)

Publication Number Publication Date
JPS6446268A true JPS6446268A (en) 1989-02-20

Family

ID=16462228

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20273187A Pending JPS6446268A (en) 1987-08-14 1987-08-14 Radial modulation inspecting device

Country Status (1)

Country Link
JP (1) JPS6446268A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03296931A (en) * 1990-04-17 1991-12-27 Canon Inc Device for inspecting information recording medium
JPH0439864U (en) * 1990-07-30 1992-04-03

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03296931A (en) * 1990-04-17 1991-12-27 Canon Inc Device for inspecting information recording medium
JPH0439864U (en) * 1990-07-30 1992-04-03

Similar Documents

Publication Publication Date Title
CA2176860A1 (en) A method for measuring a fluid level and an apparatus thereof
FR2438301A1 (en) SIGNAL DETECTION CIRCUIT OF A MAGNETIC SENSOR
JPS5332789A (en) Method and apparatus for measuring of stress of white color x-ray
GB1412026A (en) Anti-evasion system for a breath alcohol tester
JPS6446268A (en) Radial modulation inspecting device
DE3587478D1 (en) METHOD AND IMPLEMENTING ARRANGEMENT FOR TESTING AND / OR MEASURING ELECTRICALLY LEADING TEST OBJECTS.
DK0938663T3 (en) Method for testing the reliability of a test apparatus, in particular an empty bottle inspection apparatus
ES8401626A1 (en) Method and apparatus for comparing data signals in a container inspection device
JPS5676767A (en) Detecting method for abnormality in swing-type nonreturn valve
JPS5220078A (en) Creep testing apparatus
JPS57190212A (en) Device for detecting abnormality of measuring device
SU896566A1 (en) Method of quality control of articles at cylindrical loading
ATE42641T1 (en) MEASURING METHOD FOR DETECTING PARTIAL DISCHARGE AND DEVICE FOR CARRYING OUT THESE METHOD.
JPS55124076A (en) Self-checking method of testing apparatus
ES8406732A1 (en) A testing method and a device for testing subjects to be tested.
SU879444A1 (en) Method of checking strength of articles made of brittle materials
JPS52111785A (en) Flaw detector
JPS5244688A (en) Method of automatically measuring density of oxygen
SU873108A1 (en) Method of crack set-off moment determination
SU781690A1 (en) Method of detecting developing fatigue cracking in article
SU920514A1 (en) Device for non-destructive checking by acoustic emission method
SU832462A1 (en) Method of analysis of materials with aid of acoustic emission
SU1557513A1 (en) Device for calibrating flaw detectors
SU1070467A2 (en) Device for electromagnetic checking of article physical mechanical parameters
SU794490A1 (en) Article quality control method