US Utah-400, Setup And Operation, Page: 109 / 157

144x144 Router
4-43
Audio Crosspoint Board (Single Chassis version)
Crosspoint Reset Button
Resets the board logic – normally this is not used by the user.
This may be utilized in circumstances where power supplies are changed or other anomalies
occur.
Caution: Pressing the reset button would erase any switched up jumpers or out-
puts that are active.
Debug Port
Used for development and manufacturing test – not typically used by the customer. This pro-
vides a means via serial port to tie in with a computer terminal to communicate with the con-
trollers.
Time Base Module
Part number 121032-1, this is the master clock generator for the synchronous digital audio
element. This module derives an input from the midplane I/O, performs a synchronization,
then generates a master clock scheme that is used both on the crosspoint board and all input
modules.
FIGURE 4-34.
Audio Time Base Module
Reference OK
Scan Gate
Loop Lock