Acronova NB21 Series - Manual (Page 24)

Operation Manual, Nimbie USB Plus Version 1.2
Writing Speed
The recorder will automatically adjust the writing speed according to
the disc quality. The system will monitor and automatically adjust the
writing speed as the optical laser moves from the inner ring to the
outer ring, up to the selected speed. The recorder’s maximum speed
may never be reached if a lower grade disc is used.
At the maximum speed, for a single recorder, duplicating a 4.7 GB
DVD should not take more than 8 minutes. Please check both the
quality of the blank and the master disc if the duplication process
takes more than 8 minutes for a single disc. Use a reliable master
disc for testing purposes. You should also try different specification
and brands of blank discs.
You should also check the power supply’s voltage and amperes.
Insufficient power supply may decrease output rate or increase failure
rate.
As a general rule, a lower writing speed will improve quality. When
creating audio and video discs a lower writing speed is recommended
to assure quality.
SuperSpeed USB 3.0
In order to achieve the full USB 3.0 SuperSpeed, a PC with built-in
USB 3.0 ports or USB 3.0 host card installed is required.
USB 3.0 interface is backward compatible with USB 2.0, however the
transfer rate will be limited at USB 2.0.
Mac hardware currently do not support USB 3.0, Nimbie USB Plus
can only be used as a USB 2.0 device on Mac computers.
24 © 2012, Acronova Technology, Inc.