Fluke CombiScope PM3370B User Manual page 32

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Step 6 Press the ANALOG key to enter the digital mode
Step 7 Press the top one (mV) of the AMPL keys, so that the signal has
maximum amplitude.
Press AUTO RANGE and see the signal change to a suitable
attenuator value. When AUTO RANGE is active, the attenuators
automatically adjust when the signal amplitude changes, to keep the
trace on screen.
Step 8 Press the key labeled AVERAGE. Noise in the input signal can be
reduced by using the average function. The random noise is reduced
by calculating the average over the last n scans (average factor can be
set between 2 and 4096)
NOTE: Refer to Chapter 4 for an explanation of the CH1+CH2, TRIG1, and
INV keys.
GETTING STARTED