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AOpen COM5232 / AAH

Jun 18,2004 0

9. Writing Quality Tests - 3T Jitter Tests

 

Review Pages

1. Retail Package - Installation
2. Data CD Reading Tests
3. Error Correction Tests
4. DVD reading tests
5. DVD Error Correction Tests
6. Protected Disc Tests
7. DAE Tests
8. CD Recording Tests
9. Writing Quality Tests - 3T Jitter Tests
10. Writing Quality Tests - C1 / C2 Error Measurements
11. Conclusion

 

AOpen COM5232 / AAH - Page 9

Writing Quality Tests - 3T Jitter Tests

The AOpen is an all in one device. The drive is able to read DVD-ROM media and at the same time is a fast CD-R writer with a maximum supported writing speed of 52X. The writing tasks proved that the drive managed to write media at 52X but just as important is the quality of the writing. To check this, we measured the Pit and Land values of all written media and summarize the results on the following graphs. We need to mention however that of all the tested media, only four were written at the maximum speed of 52X

- 3T Pit results media

The Pit values for all four media measured, are on the high side. Only BenQ reported an average Pit value under the 35ns RedBook limit. In general, no media managed to stay within the 35ns limit.

- 3T Pit results media

The average Land Jitter values for all media are also high, with all values increasing as reading progressed towards the out tracks on the media's surface. Again, no media managed to stay below the 35ns limit.

Recording Speed
Average 3T Pit Jitter (ns)
Average 3T Land Jitter (ns)
> 35ns
Max 3T jitter values (ns)
BenQ 52X
34.20
37.63
Yes
37 Pit, 48 Land
Memorex 52X
39.78
38.83
Yes
44 Pit, 43 Land
Traxdata 52X
36.44
36.07
Yes
41 Pit, 39 Land
MMore 52X
38.71
38.59
Yes
42 Pit, 42 Land

The above table shows that all media returned values over the 35ns RedBook limit for both Pit and Land Jitter. Despite this, none of the measured media reported time out errors.

 

Review Pages

1. Retail Package - Installation
2. Data CD Reading Tests
3. Error Correction Tests
4. DVD reading tests
5. DVD Error Correction Tests
6. Protected Disc Tests
7. DAE Tests
8. CD Recording Tests
9. Writing Quality Tests - 3T Jitter Tests
10. Writing Quality Tests - C1 / C2 Error Measurements
11. Conclusion

 

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