4 Rev 2.2 • 27 Mar 10
1. Introduction
Signal Rates and Flow
Signal Rates and Flow
Routers in the NV8500 family support SD, HD and 3Gig video signals, and AES3 Digital Audio
Asynchronous audio signals, both balanced and unbalanced. The following table lists the standards
and rates for each signal type. HD signals are managed through active 3Gig cards. Embedded audio
signals are passed through. For a description of each card and corresponding part numbers, see
Input Cards
on page 38 and Output Cards on page 40.
Reference signals are required for proper switching of video signals. See Video Reference
on page
35
. No reference is required for AES3 Digital Audio Asynchronous signals.
Product Overview on page 1
Signal Flow
Routers switch incoming signals to designated output connections. Switching is directed by settings
configured in the router control system, which sends commands to the control card. In turn, the
control card directs how switching occurs on the crosspoint card. For a description of control cards
and crosspoint cards, see Active Cards
on page 37.
Standalone Routers
The NV8500 family standalone routers include the NV8144, NV8280 and NV8576. The NV8144
can house two 144 x 144 crosspoint cards (one required and one optional for redundancy).
The NV8280 and NV8576 router frames each house up to 8 crosspoint cards and an optional redun-
dant crosspoint cardset (a single module). The NV8280 crosspoint cards having a switching matrix
of 144 x 144 and the NV8576 crosspoint cards have a 288 x 288 matrix. The crosspoint card slots
are numbered 1 through 10, from left to right. An optional redundant crosspoint cardset can be
installed in slots 5 and 6. All other crosspoint cards are installed in slots 1 through 4 and slots 7
through 10. The 8 crosspoint cards are divided into 2 sets of 4, with each set of 4 fanning out and
distributing inputs to all outputs.
Each standalone router switches signals via the crosspoint card differently. In a fully loaded
NV8144 frame (i.e., all active cards installed), all inputs are sent to the crosspoint cards for distri-
bution to any or all outputs.
In a fully loaded NV8280 or NV8576 frame, inputs on the left side of the frame (when facing the
front of the router) are forwarded to crosspoint cards 1, 2, 7 and 8. Inputs situated on the right side
of the frame are forwarded to crosspoint cards 3, 4, 9 and 10, as shown in Figure 1-2 on page 6. All
Signal Type Standard Rates Supported
Audio AES3
a
synchronous
(balanced or
unbalanced)
AES3
Sample rates 32 to 192kHz (passed through)
Standard Definition
(SD-SDI)
SMPTE
259M
Auto re-clock at 270 Mb/s or auto bypass with pass-through from
19
Mb/s to 360 Mb/s
3Gig (SD-SDI, HD-SDI
and 3.0
Gb/s combined)
SMPTE
259M, 292M
424M
Auto re-clock at 270
Mb/s and 1.483, 1.485, 2.966, 2.970 Gb/s or
auto bypass with pass-through from 19
Mb/s to 3.0 Gb/s
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