TEAC DW-548D COMBO DRIVE - Page 9

Writing Quality Tests - 3T Jitter Tests

On an 80min 48X CD-R disc from Taiyo Yuden we burned the same AudioCD project at 4x, 8x, 12x, 16x, 24x, 32x, 40x and 48x. The 3T Pit & Land Jitter graphs are presented here.

- 3T Pit results

Looking at the graph above, we can conclude that Teac drive didn`t performed well at high recording speeds, keeping the jitter levels above the Redbook limit of 35ns, except for 8x, 12x, 16x and 24x speeds.

The average 3T Pit Jitter values for all recording speeds are illustrated in the following table.

The average Pit jitter for recording speeds of 24x and over is satisfactory, except 4x, and very good for those below.

- 3T Land results

Only for 16x recording speed, the performance is good. 8x can also be considered acceptable even though it oversteps the mark with 36,8ns. At all other speeds, the Land jitter performance is not good reaching a high of 42,17ns at 48x speed.

The following average values graph confirms the unacceptable levels at the higher speeds. At such levels, the possibility of errors or even audible clicks during playback is increased.

- Summary

With TEAC DW-548D is obvious that, at low and high recording speeds we have high jitter levels and with the case of land jitter, the levels are unacceptable. The device gave us good results only at the speed of 16x. The following page where we check the jitter levels produced on various manufacturers discs, should give a better indication of the writing quality level of the drive.