Method for dynamically adjusting header region RF gain while...

Details Method for dynamically adjusting header region RF gain while... Method for dynamically adjusting header region RF gain while...

2005-04-25

2008-11-18

Huber, Paul W. (Department: 2627)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Control of information signal processing channel

C369S124110

Reexamination Certificate

active

07453775

ABSTRACT:
A method for dynamically adjusting a header region RF gain of a variable gain amplifier while accessing header regions of a DVD-RAM disc, and apparatus thereof. The method includes the following steps: irradiating a light spot on the DVD-RAM disc with a pickup head; detecting a 4T peak-to-peak level of a RF signal generated by the variable gain amplifier while the light spot is moving within a VFO1column of a header region of the DVD-RAM disc; comparing the 4T peak-to-peak level with a target level; adjusting a header region RF gain of the variable gain amplifier according to a result of the comparing step.

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