32
Rev 2.3 • 14 Oct 08
2. Introduction
Active Cards
incoming composite signal.The signals is then forwarded to the motherboard for distribution to a
SD output card (EM0384) or to an AVC output card (EM0433).
AVC Output Card
The AVC output card (EM0433) receives up to 16 SD signals from the motherboard. Differential
inputs from the motherboard are buffered by receivers on the output card. The signals are fed to a
128 inputs x 16 outputs crosspoint array for switching. Each of the 16 outputs is re-clocked and
deserialized. The signals are then encoded as baseband video signals, buffered by an output line
driver and sent to the backplane as composite analog.
Figure 2-25 shows the signal path through the two AVC I/O cards:
Figure 2-25. Analog Video Conversion Signal Flow
Machine Control Signals
The NV5128 supports machine control signals, either EIA-232 or EIA-422. Machine control sig-
nals are used to communicate between two machines, such as editing equipment and a tape
machines. This enables control of two machines through a single interface.
The Machine Control card set (EM0482) is composed of two cards and occupies two slots in the
router. The Machine Control card set receives 32 signals through two passive backplanes, each con-
taining 16 RJ-45 connectors. (See
The Machine Control card set differs from other modules in that it is bi-directional. A Machine
Control card set is neither an “input” nor an “output” card; it carries signals in both directions. The
architecture of the Machine Control card set is similar to the Classic SWB card set: the port card set
occupies two slots and uses two backplanes supporting up to 32 signals. (See
page 28.) Two card sets can be linked together, cross-coupling the inputs from each card set to the
other card set, creating 64 ports. For more information, see
The port card set has one jumper used to configure the card set to function as a standalone 32-port
card set regardless of where it is installed in the frame. This means that two 32 inputs x 32 inputs
matrixes can be installed instead of one 64 inputs x 64 inputs matrix. For more information, see
Incoming and outgoing signals are buffered by differential transmitters and receivers on the card
set. When two Machine Control card sets are connected, signals are sent directly to the 64 inputs x
I/O
Connectors (up to 16)
Input Card
I/O
Connectors (up to 16)
Anti-
aliasing
filter
A/D
Converter
(27
Mhz)
Motherboard
I/O
Connectors (up to 16) SD or
AVC
Output Card
XPT
128x16
Re-clocker
Deserialized
D/A
Converter
Motherboard (x16)
Содержание NV5128
Страница 1: ...User s Guide NV5128 Multi Format Router...
Страница 44: ...34 Rev 2 3 14 Oct 08 2 Introduction Active Cards...
Страница 92: ...82 Rev 2 3 14 Oct 08 6 Maintenance Obtaining Service...
Страница 102: ...92 Rev 2 3 14 Oct 08 8 Glossary Glossary...
Страница 106: ...96 Rev 2 3 14 Oct 08 A Part Numbers Power Supplies...
Страница 114: ...104 Rev 2 3 14 Oct 08 Index...
