Measurement apparatus for use in recording unit provided with control means for controlling write and read parameters
US6195215A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1998 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Jul 29, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention is directed toward a measuring apparatus for measuring performance characteristics of a recording unit including a recording medium on which one track is divided into a plurality of sectors. The measuring apparatus includes a writing means for writing a write signal with a write parameter, a first control means for changing the write parameter value for respective sectors, a reading means for reading out the write signal written by the writing means with a read parameter and measuring the read-out write signal as a read signal, and a second control means for controlling the read parameter so as to produce predetermined read parameter values for respective sectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.