Mass Memory Module for the 8560x-series spectrum analyzers The HP (now Keysight) 85620A mass memory module is a plug-in module for the 8560A, 8560B and 8560E/EC-series portable spectrum analyzers It adds measurement personality capability, enough memory to store 100 traces, memory-card capability, and computer capability without an external controller Create complex measurement routines and save them as single-key measurements stored on memory cards or in the module's 128 KB of battery-backed RAM