BNC 1105 Universal Counter - Manual (Page 22)

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3
Making Measurements
This chapter guides users how to make some basic measurement via the
MODEL 1105 universal counter, and to get to know the relative default
parameters.
3.1 Frequency Measurement
Auto triggering is enabled by default for frequency measurement, and
the trigger levels are set to the 50% points of the signal. One may
manually disable the auto triggering function and change the trigger
levels and slopes settings (refer to Ch.4.8).
To measure frequency
1. Connect your signal source to the input channel you wish to use.
2. Press FREQ & RATIO button.
3. Press the softkey FREQ to select frequency measurement function.
Press it again to select the desired channel.
4. Optional settings:
a. Use GATE&ExtArm button to set the gate time, resolution or arming
if needed (refer to Ch.4.3).
b. Use Scale&Offset button to set the scaling and offset parameters if
it’s needed (refer to Ch.4.4).
c. Use Limit Modes button to set the upper and lower limits if it’s
needed (refer to Ch.4.5).
d. Use Stats button to set up the statistics function and limit filtering if
it’s needed (refer to Ch.4.6).
e. Use the selections in the CH1 to set the input conditions and the trig
Sens.
f. Use Show Status button to check the conditions of Input, Volt, Stats
and Limit.
g. Use Save&Recall button to save your settings (i.e., changes made in
steps a-d) if needed (refer to Ch.4.9).
5. Press RUN button to start continuous measurements.