Grass Valley PDR v.2.1 - Manual (Page 17)

Profile Family 1
Chapter
1
Introducing the Profile Family
The PDR100 Profile Video Disk Recorder and the PDR200 Profile Video File
Server are a vast improvement over traditional VTRs because they store
broadcast-quality video and CD-quality audio on computer disk drives rather
than on tape. This means that there’s no need to rewind a tape to find footage
for editing or playback, because you have almost instant access to any location
in your video and audio material on disk.
A Profile system is more than just a one-for-one replacement of a VTR: it can
have up to four video channels, something like having four independent VTRs
in one unit. Clips are available to all channels at once, so you can play a clip on
more than one channel at the same time without making a copy of it. Since each
channel is independent of the others, each playback can start at a different time
and at a different place in the clip. When you do need to make a copy of a clip,
you don’t suffer the same generation loss that you get when making copies of
tapes, since the material is digitally stored.
You can even start playing a clip while it’s still being recorded. Just start
capturing the clip on one channel, wait about five seconds, and then play the clip
back on another channel. This kind of control makes the Profile system an ideal
solution if you want to go to air with a clip before you are finished recording it.
Table 1 on page 2 lists and compares other features of the PDR100 and PDR200
in detail.
Figure 1. Profile front panel