Keysight U1281A Guia De Inicio Rapido página 12

Using the AC low-pass filter (LPF)
To avoid possible electric shock or personal injury,
WARNING
ensure that you are aware of the voltage level
without the LPF enabled. There may be a possible
presence of hazardous voltage, and voltages
measured with the LPF enabled may be greater
than indicated. For your safety, take note of the
symbol. Disable the LPF when you have
completed your measurement.
Shift
Esc
The LPF can improve measurement performance on
NOTE
composite sine waves that are typically generated
by inverters and variable frequency motor drives.
12 Keysight U1281A/U1282A Quick Start Guide