Grass Valley NV8256-Plus v.1.2 - Manual (Page 14)

4 Rev 1.2 • 20 Oct 08
2. Introduction
Signal Rates Supported
front of the router and within easy access of an AC power source. For installation instructions, see
Rack Mount on page 27.
Cooling
The router has a fan tray housing three fans. The fan tray is located at the top of the chassis and
accessed from the front of the frame. The fans draw cooling air from the front of the router, through
the door, and exhaust it through the rear of the frame. The router must have the door correctly
installed and closed for proper airflow through the chassis.
There are three removable air filters: two are located on the inside of the door assembly and one
inside the router. It is recommended that you perform regular maintenance on the fan tray and fil-
ters. For more information, see
Maintenance on page 59.
Signal Rates Supported
The NV8256-Plus supports SD, HD, 3Gig and analog composite video signals. Incoming analog
signals are converted to digital format for internal routing. Outgoing SD signals can be converted to
analog composite for distribution.
The following table lists the SMPTE standard and rates for SD, HD and 3Gig signals, and for ana-
log-to-digital and digital-to-analog conversion. Each signal type is managed by a specific input or
output card (circuit board). For a description of each card and corresponding card part number, see
Input Cards (page 15) and Output Cards (page 15).
Switching Configurations
The NV8256-Plus is designed to be highly flexible, enabling the creation of a variety of configura-
tions for managing incoming and outgoing signals. A single router can manage a maximum of
256 inputs and 256 outputs. By connecting two routers together, the number of signals managed
Caution If airflow is impeded, overheating may occur.
Type SMPTE Re-clock At Pass Through
Standard Definition
(SD) 259M
344M 143, 177, 270, 360 and 540 Mb/s 10 Mb/s to 540 Mb/s
Super Wide Band
(SD and HD combined) 259M
344M
292M 143, 177, 270, 360 and
540 Mb/s; 1.483 and 1.485 Gb/s
10 Mb/s to 1.5 Gb/s
3Gig (SD, HD and
3.0
Gb/s combined)
259M
292M
424M 270, 1.483, 1.485, 2.966 and
2.970 Gb/s
10 Mb/s to 3.0 Gb/s
Analog-to-SD
(analog to SD-SDI) Input: PAL or NTSC analog composite video
Converted to: SMPTE 259M-C, (4:2:2),
270 Mb/s
SD-to-Analog
(SD-SDI to analog)
Input: SMPTE 259M-C, (4:2:2), 270 Mb/s
Converted to: PAL or NTSC analog composite video