Sierra Video Yosemite - Manual (Page 35)

AUDIO OVERVIEW
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Digital Audio Signal Path Overview
As with analog audio systems described above, the digital audio Yosemite routing switchers use digital
modules with the same form factor. Our digital audio frames are available with both asynchronous and
synchronous options. 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. Synchronous
digital audio input buffers can replace the non-processing, asynchronous, version in blocks of 32 inputs
as desired.
Asynchronous digital audio
When the routing switcher is used as a preselector to production devices that have their own
synchronizing systems, there are generally no conflicts. This is understandably called asynchronous
audio. In applications where asynchronous audio is sufficient, our AES 110 ohm module provides cost-
effective, high performance routing of any data rate input at a signal rate frequency range of 100 KHz to 8
MHz.