Section 5. Advanced Features and PlexTools Professional
PX-716 Installation and Users Manual 63
2. We include a catalog of the tested media and their write strategy in
your drive’s firmware. (This catalog is updated when you update
your drive by downloading new firmware from the Plextor web site.)
3. When you insert a recordable disc into your drive, Plextor’s
PoweRec technology automatically identifies the manufacturer,
model, and special features of the media, then adjusts the laser power
and writing speed so they’re at the optimum settings for that disc.
4. The drive uses OPC (Optimum Power Control) to further fine-tune
the laser power setting to the specific disc that is in your drive.
5. The combined values of the pre-defined write strategies, along with
the OPC test results, create the default VariRec setting of zero.
Changing the VariRec Setting
VariRec lets you increase or decrease the laser power setting by up to 4
degrees in either the positive or negative direction. You can make these
changes for DVD+R 4X and 2.4X, DVD-R 4X and 2X, and CD-R 4X
and 8X CD-DA/data writing. VariRec also lets you change the write
strategy to match the dye profile of your disc. You can make these
changes to do comparison testing with your DVD or CD player to find
the setting that best suits you.
Changing the laser power and write strategy changes the characteristics
of the audio or data being written. For audio, you can hear these changes
during playback, although what you hear will depend on speaker quality,
audio settings, and environment.
To use PlexTools Professional to change VariRec settings for
writing:
1. Place a blank DVD±R or CD-R disc in the PX-716.
2. In the PlexTools menu bar, select Drive Settings. You see the tabs
for drive settings.
3. Select the VariRec tab. You see the VariRec window.
4. To turn VariRec on for recording, place a check mark in the Enable
VariRec box.
