Input cards, Input card functions, Status reporting – Grass Valley NV8288 v.1.5 User Manual
Page 26: Crosspoint cards, Input card functions status reporting, Introduction
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Rev 1.5 • 24 Sep 09
2. Introduction
Active Cards
The control card includes a status reporting circuit. Four LEDs on the front of the control card indi-
cate the card’s status: low battery (Red), alarm (Red), active (Amber) and “healthy” (Green). For
more information, see
Input Cards
The router frame can house up to 24 standard input cards, each processing up to 12 SD-SDI or 12
SWB signals. Input cards receive incoming signals through connections on I/O backplanes and feed
outputs to the crosspoint cards.
There are two types of input cards available, one for incoming SD-SDI signals and one for incom-
ing SWB signal. Both the NV8288 and the NV8288-Plus can have either input card installed. Each
card is listed by the type of signal it manages
—
SD or SWB. For your convenience, the part num-
ber for each card has been included. For a detailed description of a card’s function, see
, following.
Input Card Functions
Both input cards contain 12 cable equalizers. Each cable equalizer equalizes the signal and distrib-
utes two copies of the signal to the motherboard. The motherboard forwards copies to all installed
crosspoint cards. Because all incoming signals are sent to all crosspoint cards, an incoming signal
can be distributed to any or every output card.
Figure 2-15 shows the flow of a signal through the SD-SDI and SWB input card.
Figure 2-15. Input Card Block Diagram
Status Reporting
All input cards feature a circuit that performs status reporting and drives the card’s functions. Two
LEDs on the front of the input card indicate the card’s status: alarm (Red), power good (Green).
Three additional LEDs situated further back on the card indicate if software is loaded (Amber), if
there is good communication with the control card (Green) or bad communication with the control
card (Red). For more information, see
Crosspoint Cards
Crosspoint cards (EM0534) receive signals from the input cards (via the motherboard) and com-
mands from the control card. The crosspoint card then performs switching as directed, sending sig-
Input Card
Category
Signal Type
Standard
(SMPTE)
Rates
Part Number
Standard
SD
259M
344M
143, 177, 270, 360, and 540 Mb/s EM0530
Standard
SWB
259M
344M
292M
143, 177, 270, 360 and 540
Mb/s;
1.483 and 1.485 Gb/s
EM0531
Coaxial
Connector
(12)
Motherboard
Buffer
Copy of Signal
Copy of Signal
All crosspoint cards
Cable
Equalizer