Grass Valley NV8500 Series v.3.5 - Manual (Page 72)

56
Inputs and Outputs
I/O Cards
The video signals received from the crosspoint card are sent to a reclocker and then a cable
driver for distribution to backplane connectors. Embedded audio in the video streams is passed
through the router with its video.
A copy of the MADI and video signals are sent to a monitor card. (See Monitoring on page 89.)
The following diagrams shows the flow of a signal through MADI I/O cards. The hybrid cross-
point card uses a TDM matrix to switch audio signals from hybrid I/O cards. Video signals are
managed by a crosspoint matrix.
Fig. 2-20: Flow for Routers other than the NV8140
Fig. 2-21: Flow for the NV8140
Setting the Number of MADI Channels
You can configure the MADI output card for 56 or 64 channels (at 48 kHz). To set the number of
MADI channels:
1 Locate the MADI output card to change.
2 Remove the card from the router frame.
3 Locate DIP switch 4:
4 Using a small, pointed object, such as a ball point pen, slide the switch to ON or OFF to con-
figure the channel mode:
ON — 56 channel mode.
OFF — 64 channel mode.
5 Repeat for other MADI output cards you want to change.
Hybrid 3Gig/TDM
Input Cards
Hybrid 3Gig/TDM
Output Cards
Cable
Equalizer
to
Monitor
Card
MADI
Receiver
Monitor
Selector
Reclocker
to Monitor
Card
MADI
Formatter
Monitor
Selector
Cable
Driver
16 video
TDM
Matrix
(Audio)
Crosspoint
Matrix
(Video)
Audio
TDM MUX
2 MADI Cable
Driver
16 video
128 audio
16 video
128 audio
8 video
1 MADI
Hybrid 3Gig/TDM
Input Cards
Hybrid 3Gig/TDM
Output Cards
Cable
Equalizer
MADI
Receiver
Reclocker
MADI
Formatter
Cable
Driver
16 video
TDM
Matrix
(Audio)
Crosspoint
Matrix
(Video)
Audio
TDM MUX
2 MADI Cable
Driver
16 video
128 audio
16 video
128 audio
16 video
2 MADI
+3V3
+2V5
+1V8
R259
TP4
TP2
R243
TP3
R249
TP5
TP6 R232
2 1
OFF
ON
S1 C
R341 C489
C
L61
L47
C505
R338
C532
C473
3 4 5 6 7 8
ON
C490
C506
C4
C474 +1V2
+
Switch 4 is at the top left corner of the board, in
the 4th position on the DIP labeled S1.