Technical data

98 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.