Technical data

94 34980A Service Guide
4 Troubleshooting and Diagnostics
34922A 70-Channel Armature Multiplexer
The high- density 34922A 70- Channel Armature Multiplexer (70- Ch Arm
MUX) is divided into two banks with 35 latching armature 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
internal DMM for voltage or resistance measurements. Refer to the
simplified schematic below.
For the 34922A, relay part numbers are given on page 126 and the
component locator is shown on page 137. The table on the next page
shows the relationship of channel numbers to relay numbers.