HP 53131A Operating Manual page 117

Chapter 2 Operating Your Universal Counter
Using the LIMITS Menu Keys
5 Press Run key to display the graph as shown below.
Freq
The asterisk (*) or star represents the measurement and the colons (:)
represent the limits you set. This graph indicates that the measurement is
within the limits. The colon to the left represents the lower limit, and the
colon to the right represents the upper limit.
6 Adjust your signal down to 9.7 MHz.
Freq
The star is now out of the limits as it is below the entered 9.8 MHz lower
limit. (Note the Limit annunciator lights since the signal is out of limits.)
7 Now, adjust your signal up to 10.3 MHz.
Freq
The star is now out of the limits as it has exceeded the entered 10.2 MHz
upper limit. (Note the Limit annunciator lights since the signal is out of
limits.)
8 To change the Counter back to displaying numbers, press Limit Modes
key until SHOW: GRAPH is displayed.
9 Press any one of the arrow keys to toggle to SHOW: NUMBER .
10 Press Run key to display measurements as numbers.
Operating Guide
Ch 1
Ch 1 Limit
Ch 1 Limit
2-41