Troubleshooting and Diagnostics 4
Keysight 34980A Service Guide 97
34931A Dual 4x8 Armature Matrix
The 34931A dual 4x8 armature matrix contains two matrices, each with 32 2-wire
crosspoint latching armature relays organized in a 4- row by 8- column
configuration. Every row and column are made up of two wires each, a high (H)
and a low (L). Each crosspoint relay has a unique channel number representing
the row and column that intersects to create the crosspoint. For example, channel
304 represent the crosspoint connection between row 3 and column 4 (all
columns consisting of two digits; in this case the digits are 04). See the simplified
schematic below.
Backplane Relay Backplane Relay
911 K800 921 K804
912 K801 922 K805
913 K802 923 K806
914 K803 924 K807
Bank 1 Bank 2
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