4 Troubleshooting and Diagnostics
98 Keysight 34980A Service Guide
Matrix 1 and Matrix 2 are electrically separate from one another.
Matrix Relays: Armature latching. Analog Bus Relays: Armature non-latching.
For the 34931A, relay part numbers are given on page 130 and the component
locator is shown on page 144. The table below shows the relationship of channel
numbers to relay numbers.