Keysight Technologies Inc. Y1131A Verification and Diagnostic Tools for 34980A Mainframe and Plug-in Modules
"Used for 34980A mainframe and modules - select option for specific module support. The Y1131A provides a set of diagnostic tests for the relay switching modules available for the Keysight 34980A Multifunction Switch/Measure Unit. The software provides module-specific tests to assist you with troubleshooting possible relay failures and predicting system maintenance requirements."