100 34980A Service Guide
4 Troubleshooting and Diagnostics
34924A 70-Channel Reed Multiplexer
The high- density 34924A 70-Channel Reed Multiplexer (70-Ch Reed MUX) is divided
into two banks with 35 non-latching reed switches (channels 1-35 and 36-70) in each.
This module also contains eight armature Analog Bus relays (channels 911-914 and
921-924), four on each bank that can connect the bank relays to the system Analog
Buses. Through ABus1 and ABus2 you can connect any of the channels to the system
DMM for voltage or resistance measurements. See the simplified schematic below.
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