NEC ND-3520A full review
3. CD Error Correction Tests
Review Pages
2. Transfer Rate Reading Tests
3. CD Error Correction Tests
4. DVD Error Correction Tests
5. Protected Disc Tests
6. DAE Tests
7. Protected AudioCDs
8. CD Recording Tests
9. Writing Quality Tests - 3T Jitter Tests
10. Writing Quality Tests - C1 / C2 Error Measurements
11. Writing Quality Tests - Clover System Tests
12. DVD Recording Tests
13. Media Support list - +R/+RW/+R9 (DL) media
14. Media Support list - -R/-RW
15. Media Support list - CD-R/CD-RW
16. CDSpeed/PlexTools Scans - Page 1
17. CDSpeed/PlexTools Scans - Page 2
18. CDSpeed/PlexTools Scans - Page 3
19. CDSpeed/PlexTools Scans - Page 4
20. CDSpeed/PlexTools Scans - Page 5
21. CDSpeed/PlexTools Scans - Page 6
22. CDSpeed/PlexTools Scans - Page 7
23. CDSpeed/PlexTools Scans - Page 8
24. CDSpeed/PlexTools Scans - Page 9
25. DVD+R DL - Page 1
26. DVD+R DL - Page 2
27. BookType Setting
28. Conclusion
NEC ND-3520A Burner - Page 3
CD Error Correction Tests
In the following tests we check the drive's behavior when reading scratched / defective audio discs. The test discs used were the ABEX series from ALMEDIO.
- ABEX TCD-721R
Errors
total
|
Num:
1521355
|
||
Errors
(Loudness) dB(A)
|
Num: 160496 | Avg: -79.5 dB(A) | Max: -16.0 dB(A) |
Error
Muting Samples
|
Num: 6038 | Avg: 1.4 Samples | Max: 563 Samples |
Skips
Samples
|
Num: 90 | Avg: 6.0 Samples | Max: 6 Samples |
Total Test Result |
62.0 points (out of 100.0 maximum) |
||
C2 Accuracy |
96.9 % |
The maximum error loudness level was high at -16.0dB and there were 90 skipped samples. This indicate poor CD error correction capabilities.
- ABEX TCD-726
Errors total
|
Num:
8595
|
||
Errors (Loudness) dB(A)
|
Num: 6634 | Avg: -86.0 dB(A) | Max: -15.2 dB(A) |
Error Muting Samples
|
Num: 164 | Avg: 11.2 Samples | Max: 467 Samples |
Skips Samples
|
Num: 1 | Avg: 6.0 Samples | Max: 6 Samples |
Total Test Result |
75.6 points (out of 100.0 maximum) |
||
C2 Accuracy |
98.1 % |
Although the Abex TCD-726 test disc is much easier for drives in general to read, the NEC burner 's performance does not indicate high error correction. There was only one skipped sample, but the drive managed a total score of 75.6 where better drives manage scores closer to 100. In general, the drive's CD error correction capabilities need to be further improved.
- CD-Check Audio Test Disc
The CD-Check Test Disc is a very useful tool for evaluating the Sound Reproduction
/ Error correction capabilities of a CD player. The disc offers a signal combination
with disc error patterns to rate the drive's abilities to read music and reproduce
it completely. Five tracks on the disc contain a sequence of progressively
more difficult tests. These tracks are referred to as Check Level-1 through
Check Level-5.
The tracks are reproduced through a software multimedia player (i.e. Windows Media Player). Each level is considered as passed, if the tone is smooth, continuous without interruptions, skipping or looping. The higher the Check Level passed, the more reliable the sound reproduction of the tested drive.
Error Level
|
1
|
2
|
3
|
4
|
5
|
NEC ND-3520A
|
5/5
|
5/5
|
3/5
|
0/5
|
0/5
|
The drive successfully passed only the first two out of the five check levels for this test. Here too, the drive turned in a poor performance. Almost all drives have difficulties reading the 5th level but good quality drives can read up to the 4th level. However, most drives will pass at least the third level without any problems.
- Summary
Generally we can say that the CD error correction of the NEC ND-3520A is not good, something that could be fixed with newer firmware releases.
Review Pages
2. Transfer Rate Reading Tests
3. CD Error Correction Tests
4. DVD Error Correction Tests
5. Protected Disc Tests
6. DAE Tests
7. Protected AudioCDs
8. CD Recording Tests
9. Writing Quality Tests - 3T Jitter Tests
10. Writing Quality Tests - C1 / C2 Error Measurements
11. Writing Quality Tests - Clover System Tests
12. DVD Recording Tests
13. Media Support list - +R/+RW/+R9 (DL) media
14. Media Support list - -R/-RW
15. Media Support list - CD-R/CD-RW
16. CDSpeed/PlexTools Scans - Page 1
17. CDSpeed/PlexTools Scans - Page 2
18. CDSpeed/PlexTools Scans - Page 3
19. CDSpeed/PlexTools Scans - Page 4
20. CDSpeed/PlexTools Scans - Page 5
21. CDSpeed/PlexTools Scans - Page 6
22. CDSpeed/PlexTools Scans - Page 7
23. CDSpeed/PlexTools Scans - Page 8
24. CDSpeed/PlexTools Scans - Page 9
25. DVD+R DL - Page 1
26. DVD+R DL - Page 2
27. BookType Setting
28. Conclusion