Using The Lpf (Low Pass Filter) Function For Ac+Dc Measurements; Figure 2-10 Ac+Dc Voltage (With Lpf) Display - Keysight Technologies U1281A User Manual

Making Measurements 2

Using the LPF (Low Pass Filter) Function for AC+DC measurements

Your multimeter is equipped with an AC LPF to help reduce electronic noise when
measuring a mixed signal.
1 Enable the LPF (refer to "Enabling the AC path filter (for U1282A only)" on page 140).
2 Rotate the multimeter's rotary switch to
.
V
3 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 2-10 AC+DC voltage (with LPF) display
Keysight U1281A/U1282A User's Guide 61