Sierra Video Ponderosa 3G Series Routing Switcher - Manual (Page 78)

SIERRA VIDEO
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Digital Audio
As with analog audio systems described above, the digital audio routing switchers use
digital modules with the same form factor. These audio AES/EBU compatible routers use
high-frequency digital 110 ohm balanced line receivers. They can also be ordered to
support S/PDIF single-ended signals with an input/output impedance of 75 ohm.
Input buffers
The basic digital audio input buffer module has thirty-two balanced 110 ohm AES/EBU
audio line receiver circuits that in turn connect their outputs via the motherboard to the
crosspoint modules.
Module Layout
For the routing system to function properly, every module must be placed in the proper
slot.
Access to the modules is made by removing the front door containing the fans and
unplugging the fan harness.
Warning:
The unit must not be operated with the front fans removed or damage could be caused to the
modules. Although modules are “hot-swappable” it is advised that power be removed when
removing or inserting modules when possible.
6464 Frame Analog Mono and Digital
The 3RU 6464 has 5 slots for modules with the bottom slot unused.
The top slot in both the analog and digital frame contains the input buffer module for
inputs 1-32.
The next (2 nd ) slot down contains the crosspoint/output driver module for outputs 1-32.
The 3 rd slot from the top contains another crosspoint/output driver module for the outputs
33-64.
The 4 th slot from the top contains an input buffer module for inputs 33-64.
*The bottom slot (slot 5) is not used.
Note:
If the frame is configured as a 32x32 mono router, only the top 2 slots are loaded with modules.
Inputs 1-32 mono
or stereo 1-16
Inputs 33-64 mono
or stereo 17-32
Outputs 1-32 mono
or stereo 1-16
Outputs 33-64 mono
or stereo 17-32