User`s guide

Making Measurements 2
Measuring AC and DC Signals
U1273A/U1273AX User’s Guide 45
Using the LPF (Low Pass Filter) Function for AC+DC
measurements
Your multimeter is equipped with an AC low pass filter to
help reduce unwanted electronic noise when measuring a
mixed signal.
1 Enable the LPF (You may refer to “Enabling the filter” on
page 130)
1 Rotate the multimeter’s rotary switch to / .
2 Press to activate the low pass filter function ( ).
Your multimeter continues measuring in the AC+DC mode,
but now the signal diverts through a filter that blocks
unwanted voltages above 1 kHz
Figure 2-9 Low Pass Filter(LPF) for AC+DC voltage measurements
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