HP 53131A, Operating Manual

Page: 116 / 196

Chapter 2 Operating Your Universal Counter
Using the LIMITS Menu Keys
2-40 Operating Guide
2
Limits Testing Example 2—Flag On Limits but
Continue Measuring
If you decide that you want the Counter to flag measurements that are out
of limits but to continue taking measurements, then perform the following
steps.
1 Press Limit Modes key until ON FAIL: STOP is displayed.
2 Press any one of the arrow keys to toggle to the next state.
ON FAIL: GO ON
is displayed.
3 Press Run key to start making measurements with this limits-testing
choice selected.
Now, each time a measurement drifts out of the user-entered limits the
Limit annunciator in the display will light, but the Counter will continue
to make measurements.
The Limit annunciator will go on whenever a result is out of limits.
As soon as a result is within limits, the Limit annunciator will go off.
Limits Testing Example 3—Use Analog Graph Display While
Adjusting Input Signal
1 For demonstration purposes, connect a 10 MHz signal to channel 1 and set
up the Counter to measure the frequency of the signal, using the
Freq & Ratio key. (Refer to section in this chapter titled “To Measure
Frequency” if needed.)
2 Using the Uppr & Lower key, set the upper limit to 10.2 MHz and the
lower limit to 9.8 MHz. (Refer to the section in Chapter 1 titled “To Set
Limits of Measurements” if needed.)
3 Press Limit Modes key until SHOW: NUMBER is displayed.
4 Press any one of the arrow keys to toggle to the next state.
SHOW: GRAPH is displayed.