HP 8712ET User Manual Supplement page 54

Measurement Setup and Control with Fast Recall
The production and testing of RF components often involves several
steps, with each step requiring a unique set of instrument settings.
Likewise, the different test configurations at each step may require
associated calibrations. Manually entering these sets of parameters (or
"states") or calibrating at each step in the manufacturing process is slow,
prone to operator error, and costly. The fast-recall feature allows you to
recall one of seven instrument states with just a single key press, or to
cycle through up to seven different instrument states with a switch.
4-2 Automating Measurements