Nec ND-2500A

Review Pages

1. Retail Package - Installation
2. Data CD Reading Tests
3. CD Error Correction Tests
4. DVD Reading Tests
5. DVD Error Correction Tests
6. Protected Disc Tests
7. CD-DA - DAE Tests
8. CD Recording Tests
9. 3T Jitter Tests - Page 1
10. 3T Jitter Tests - Page 2
11. C1 / C2 Error Measurements
12. DVD Recording Tests
13. KProbe PI/PO Error Measurements
14. Conclusion

NEC ND-2500A DVD±RW recorder - Page 10

Writing Quality Tests - 3T Jitter Tests

The same Nero compilation used in the previous jitter tests was used once again, this time with media from different brands. The recording speed was the maximum 32x in all cases. The following graphs show the 3T Pit & Land Jitter results.

- 3T Pit results

Once again the NEC drive showed it is a quality writer. No matter what the media brand used, the jitter levels were all low.

The average 3T Jitter values for all manufacturers discs are illustrated in the following graph.

- 3T Land results

The drive continues to impress with regards to its writing quality.

The average values presented below illustrates the drives recording ability.

Recording Speed	Average 3T Pit Jitter (ns)	Average 3T Land Jitter (ns)	> 35ns	Max 3T jitter values (ns)
Mam 52X	26.39	24.54	No	27 Pit, 26 Land
HiSpace 48X	25.83	27.83	No	29 Pit, 31 Land
CMC 48X	24.46	25.44	No	26 Pit, 27 Land
Ritek 48X	22.29	22.15	No	24 Pit, 23 Land
SKC 48X	27.24	27.61	No	29 Pit, 29 Land

- Summary

Generally, from this series of tests, we can conclude that the drive is a high quality CD recorder. All the discs we burnt produced very low jitter values, regardless of manufacturer or speed.

On the following page we check the C1 and C2 error rates for the same discs. These are the last of the quality tests.