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Home > Essays > Optical Storage

Monday, January 13, 2003
Jitter Tests

2. 3T Pit Results

Jitter Tests - Page 2

3T Pit Results

The results show that the YAMAHA CRW-F1E has the lowest 3T Pit jitter. The recording speed (4X, 8X) does seem to affect the 3T Pit jitter (22.91ns average for 4X, 24.88ns average for 8X). YAMAHA comments that the 4X speed is the optimal with the RITEK JS Type media and the drive has this information in firmware. When user chooses the "BestWriteSpeed" setting, the CRW-F1E series will write at 4X, not at 8X, producing the lower Jitter values.

The TEAC CD-W540E 4X boost function gives an average 24.49ns jitter, while PleXWriter PX-W4824A VariRec +0 mode produced higher 3T Pit jitter than the two other technologies (27.39ns average).

Comparing the three technologies with the normal 4X writing speed, we notice that with the RITEK JS Type media, the YAMAHA's AudioMASTER 4X speed produced the best results (22.91ns). The CRW-F1E 4X and TEAC's "4X Boost" speeds sharing the second place (24ns). The AudioMASTER at 8X produced higher Jitter (24.88ns) than TEAC's CD-W540E 4X writing speed (24.98ns). Lastly, Plextor's VariREC +0 function does seem to affect negative the 3T Pit Jitter since the average Jitter is 27.39ns vs. 26.88ns of the normal 4X writing speed.




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