Operating Guide xxiii
HP 53131A/132A Quick Reference Guide
The Quick Reference Guide is designed for experienced users of the 
HP 53131A/132A Universal Counter. It is intended to be used as a tool to 
trigger your memory. If you are using the HP 53131A/132A for the first 
time, HP recommends that you at least read Chapter 1, “Getting Started,” 
in the Operating Guide first.
The Quick Reference Guide follows this page, and consists of the following 
items:
• Menu Trees which may be torn out of the guide for external use 
(pages 1, 2, 3a, and 3b).
• Menu Roadmaps which illustrate via key-press sequences how to 
navigate through the menus under the menu keys (pages 4 
through 11). Key-press sequences are provided for the following 
menu keys:
– Freq & Ratio
– Time & Period
–Other Meas
– Gate & ExtArm
– Uppr & Lower
– Limit Modes
– Scale & Offset
–Stats
– Trigger/Sensitivity