Grass Valley M-Series iVDR Service Manual - Manual (Page 18)

18 M-Series Service Manual 6 July 2004
Chapter 1 Product Description
Application System
The Application system architecture is similar to that of standard PC-type computers.
It uses an ATX form factor motherboard which provides PCI board slots for
expansion, built in Ethernet, dual IDE ports for connecting to the system drive and
removable media drives, USB2.0 ports, and an AGP slot for graphics. Standard iVDR
boards are as follows:
• Accelerated Graphics Port (AGP) Board — This Grass Valley board provides an
Accelerated Graphics Port for the Front Panel and a connection for a VGA monitor.
This board receives video from the Real Time system and uses a specialized
application of AGP technology to provide active video monitoring within the
computer display.
• RS422 Boards — The iVDR has two RS422 boards. These standard boards provide
four RS-422 ports for connecting remote control devices.
The media drives are adapted and configured by Grass Valley for use in the iVDR.
They contain the media and communicate to the iVDR via a SCSI interface. They are
mapped to the Windows operating system using the V: drive letter.
The Application system uses a Windows operating system upon which all M-Series
applications run for configuration and control of the iVDR.
Real Time System
The Real Time system uses Grass Valley boards to provide the core video disk
recorder functionality. Primary components are as follows:
• Real Time Processor (RTP) Board — This board provides a dedicated processor
and connections for media access and processing. It functions as a riser board,
connecting to the PCI slot below and the Codec board above.
• Codec Board — This board hosts the circuits responsible for encoding/decoding
video and processing audio and timecode. It also provides the majority of the
iVDR’s media-related input and output connectors.
• XLR Board — This board provides XLR audio connectors. It is primarily an
extension of the codec board to allow the space and orientation required for XLR
connections.
• SCSI interface — The SCSI interface for the media drives is on the Real Time
Processor board.
The Real Time system uses a dedicated operating system. This operating system runs
on the RTP board and manages all the hardware involved in controlling the flow of
video, audio, timecode, genlock, and GPI in and out of the iVDR.