HP 53131A, Operating Manual

Page: 118 / 196

Chapter 2 Operating Your Universal Counter
Using the LIMITS Menu Keys
2-42 Operating Guide
2
Limits Testing Example 4—Selecting Filtering Conditions of
Stats Computation
Let’s assume you have set the upper and lower limits to reasonable values
as in the previous procedure.
NOTE Since the Limit Testing and Stats functions are independent, LIM TEST:
doesn’t have to be ON in order to filter measurements for statistics.
1 Press Stats key until USE: ALL MEAS is displayed.
2 Press any one of the arrow keys to display USE: IN LIMIT .
3 Press Run key to start the measurement.
The Counter will compute statistics using only measurements that are
within the user-entered limits.
4 Press Stats key until USE: IN LIMIT is displayed.
5 Press any one of the arrow keys to display USE: ALL MEAS .
The Counter will compute statistics using all measurements, whether
they fall in or out of the user-entered limits.
6 Press Run key to start the measurement.
7 To turn off the Limit Testing, perform the following steps:
a. Press Limit Modes key until LIM TEST: ON is displayed.
b. Press any one of the arrow keys to toggle Limits OFF.
LIM TEST: OFF
is displayed.
When Limit Testing is off, the Limit annunciator, the stop-on limit
capability, the limit graph, and the rear panel RS-232 Limit Output
(if DTR: LIMIT choice was selected as described in the following
Example 5 procedure) are disabled.
NOTE
Stats will still filter data using your upper and lower limits if you set Stats
to USE: IN LIMIT.
8 Press Run key to return the Counter to computing statistics on all
measurements.