Grass Valley PDR 200 Service Manual - Manual (Page 34)

Chapter 3 Theory of Operation
3-2 PDR 200 Service Manual
System Overview
The Profile system consists of three major types of functions:
• Input and output of audio and video signals, regardless of encoding standards.
• Video processing, conversion and storage, controlled by the system processor over
the EISA bus.
• the User Interface and System I/O, which consists of the system processor, system
hard and floppy drives, and the keyboard and mouse, along with the monitoring
used to control the entire system.
The optional LAN board provides an Ethernet networking capability and the Fibre
Channel option adds file sharing between Profiles.
Figure 3-1 shows the basic 4-channel PDR 200 concept.
Figure 3-1. Basic PDR 200 Concept
Video in and out, and mix effects travel through the 32 x 32 video router to the Record
and Play devices. These devices provide video compression prior to hard disk storage
and decompression upon retrieval, both across an Ultra SCSI bus. The increased
power of the system lies in its ability to process digital, analog, and embedded audio
through a single 16-channel processor.
The Media Hard Disk array provides program material and allows fast transfer of data
both within the system from disk to controller and externally from the Fibre Channel
interface.
9675-49
Video
In
Rec/Play
CODECs
Rec/Play
CODECs
32 x 32
Router
Processor
16 Ch.
Input
Mx
Output
Mx
Video
Out
F/C
Media
Hard Disks
Fx
AES
Embedded
Analog