Sierra Video Ponderosa 3G Series Routing Switcher - Manual (Page 69)

PONDEROSA
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Balanced Digital Audio
Ponderosa digital audio routers use 25-pin “D” connectors for input and output connection..
All inputs are internally terminated with 110 ohms in the digital audio routing switchers. Likewise,
all outputs are source-terminated with 110 ohms (55 ohms per line).
When balanced digital audio is ordered, Sierra Video supplies a removable screw terminal
adapter. Use of the adapter is optional.
Each adapter panel connects to 4 of the 25-pin “D” connectors. This connects a total of 32 inputs
or outputs.
The 25-pin “D” connectors each support a group of 4 inputs or outputs and the screw terminals
are in groups of 4 containing 2 inputs or outputs each.
Example: If an adapter panel is connected to the top row of 25-pin “D” connectors on the back of
the frame, the screw terminals will be configured as below;
Rear of Frame
I/O 25-32 I/O 17-24 I/O 9-16 I/O 1-8
1-2 3-4 5-6 7-8 9-10 11-12 13-14 15-16 17-18 19-20 21-22 23-24 25-26 27-28 29-30 31-32