Grass Valley PDR 200 Service Manual - Manual (Page 19)

Product Description
PDR200 Service Manual 1-3
Product Description
The PDR200 Video File Server is a computer-controlled, disk-based system. It can
be used in any application that involves the recording, storage, manipulation, transfer,
and playback of video. Application software runs on the Windows NT
TM operating
system. The system’s total amount of program material storage depends on the
number of disk drives connected and the selected compression factor.
System Control
An internal Pentium processor board controls the system which uses a dedicated
(system) hard disk for program and application storage. The Microsoft Windows NT
operating software also resides on this disk. A 3
1
/
2
-inch floppy disk drive (or an
optional parallel port CD-ROM) provides for software updates and additions.
The system supports three control interfaces: RS-232, RS-422 (eight ports), and
keyboard/mouse. In addition, an internal VGA board supports an optional SVGA
monitor (1024
×
768 @ 72 Hz.).
Video
The PDR200 accepts the following video formats:
• Serial Digital I/O.
• Analog Component (input only, 525 or 625 line).
• Analog Composite I/O (PAL or NTSC).
It converts these formats to parallel digital data and then routes the data to the Disk
Recorder board via an internal video router. The PDR200 compresses (JPEG) the
parallel digital data and stores it on the media hard disks.
Upon recovery, the system decompresses the parallel digital component video and
routes it to the output circuitry where it is converted back to serial digital or analog
format. Composite outputs undergo an additional conversion back to either the NTSC
or PAL format. The composite output board supports up to four composite program
outputs and a monitor channel. The monitor channel can have time code burned in.
Each video channel can be supported by up to four channels of audio. The system
stores the audio signal on a hard disk along with the video. For playback, the system
recovers the audio from its storage location and outputs it with the same video signal
relationship it had when recorded.