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 BC045 Radiation Monitor Multiplexer
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The BC-045 circuit is a multiplexer designed to select one of eight RJ45
channels (innermost 4 wires).  It is being used as a way to remotely select
from one of eight radiation sensors.  3 selection bits are connected to
digital outputs on the E-brick.  Mohan Ramanathan has written an EPICS
application to control the system.