Sierra Video Ponderosa 3G Series Routing Switcher - Manual (Page 63)

PONDEROSA
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Digital Audio Output Accessories
75 ohm Unbalanced Digital Audio
By using BNC adapter panels, each of the 110 ohm balanced inputs is converted to 75 ohm
unbalanced 1 V P-P nominal input level. The BNC conversion / adapter panel option for the
outputs converts each output to BNC connectors with 75 ohm source impedance and nominal 1 V
P-P output level. The adapter panels require more space than the routing switcher. They are
separate rack mount panels which interconnect to the 25 in D connectors with short cables that
we provide with the adapter panels.
110 ohm Balanced Digital Audio
All inputs are internally terminated with 110 ohms in the Ponderosa digital audio routing
switchers. Likewise, all outputs are source-terminated with 110 ohms (55 ohms per line).