Pass 1 : Disc out of the box

The disc was tested without undergoing any specific processing before testing. Present were some dust particles and handling defects such as minor scratches and fingerprints.

Blu-Ray burner	LG GBW-H10N vGL02
Disc	TDK BD-R 25GB
Media ID	TDKBLDRBA (000)
Writing speed	4x CLV

The specific disc was burned at 4X CLV.

- Measurements

Digital errors

BEL exceeded the limits in many cases, although no uncorrectable errors were reported, despite the 4x CLV burning speed.

RSER is increased over the complete data area, as we can see in the graph below.

Jitter

Reflectivity modulation

Reflectivity

Servo & Tracking parameters - RADIAL2

Although the spikes in the radial tracking error should be attributed to local defects on the disc surface, the peak in the signal's level at the beginning of the disc, reveals continuous tracking movements of the head in order to follow the data track. At the same area on the disc, high RSER and BEL were reported.

All signals

Despite the existence of digital errors, the specific disc was readable. The BEC was within specifications, and no UNC errors were reported.