User`s manual

SIERRA VIDEO
28
Crosspoint Sub-assembly Modules
The analog audio crosspoint module used in the Yosemite Family is a 128x32 module. The switching
integrated circuit (IC) is a HCMOS 16x8 array. Thirty-two of these switching IC’s are arranged to form a
128x32 matrix.
Each output bus from the switching matrix feeds a differential output. The output driver provides a
symmetrical low impedance output signal.
The 64x64 frame has positions for two 128x32 / 32-channel output driver modules; the 128x128 frame
has positions for four 128x32 / 32-channel output driver modules. Grounding the negative side of the
output drive adds +6dB of audio gain.