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Today I’m going to show you how to use limit testing for the 53100-series of counters.
We’ve got a ten-megahertz signal that’s being measured by a 53132A counter.
First thing that we do is set our upper and lower limits, so I press the Upper and Lower
Limits key and set up my upper limit for a 10.2 megahertz signal. So here’s my 10,
and I scroll over and enter in 10.2 megahertz as my upper limit. I press the Upper and Lower
Limit again to get to my lower limit. I scroll over to set my lower limit as being 9.8 megahertz.
This will now tell me whether my input signal is drifting beyond 200 kilohertz
of the desired frequency.
I can press my Limit Modes, and you can see that my limit test has already been turned
on at this time. So I press Run, and I will get my measurement again of ten megahertz.
If I increase my frequency to go beyond the 10.2-megahertz upper limit, you can see that
my limit indicator turns on. If I end up going back to ten megahertz, my limit indicator
goes away telling me that I am within my limits, and if I go below 9.8 megahertz, my limit
indicator turns on again to show me that I have exceeded my limits.
That is how you set up some basic limit testing for the 53100-series of counters.