JPS616913U

JPS616913U - Disk type recording media tester

Info

Publication number: JPS616913U
Application number: JP9088184U
Authority: JP
Inventors: 文雄肥田; 真司本間
Original assignee: 日立電子エンジニアリング株式会社
Priority date: 1984-06-20
Filing date: 1984-06-20
Publication date: 1986-01-16
Anticipated expiration: 1999-06-20
Also published as: JPH0713052Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

図は、この考案の一実施例を示す電気的ブロツク図であ
る。The figure is an electrical block diagram showing one embodiment of this invention.

Claims

[Claims for Utility Model Registration] 1. A drive device for rotationally driving and moving a disk-type recording medium to be inspected, and a drive device and a drive device that are arranged at predetermined intervals in the circumferential direction of the rotation and that a write head and at least one read head for writing or reading signals on the recording surface of the disk-type recording medium, each of which is movable in a direction; and a predetermined test signal applied to the write head. a write circuit for supplying a write signal; and a write circuit provided independently for each of the read heads, which compares the level of the read signal from the corresponding read head with a reference level, and indicates the presence or absence of a recording error according to the comparison result. A disk-type recording medium tester comprising: a test circuit that outputs a signal; and an error signal forming circuit that forms an error signal based on the output of each of the test circuits. 2. The inspection circuit includes an average level detection circuit that calculates an average level of the read signal for one track, and an average level detection circuit that calculates the average level of the read signal for one track, and when the read signal for a certain track is output from the read head, the test circuit detects the average level of the read signal for one track. and an error detection circuit that compares the average level obtained by the average level detection circuit with the readout signal as the reference level and outputs a signal indicating the presence or absence of the recording error. A disk-type recording medium tester according to scope 1. 3. The read head includes a first read head;
a second reading head, and the error signal forming circuit synchronizes the output of each of the testing circuits paired with each of the reading heads according to the separation interval of the heads;
The disk-type recording medium tester according to claim 1 or 2, wherein the error signal is generated by calculating the logical product thereof. 4. Claims 1 to 3, wherein writing by the writing head and reading by each of the reading heads are performed in parallel on the same or adjacent tracks on the disk-type recording medium. Disk type recording media tester.