User manual

PicoScope 6 User's Guide 111

7.1.1.3

Lowpass filtering

The lowpass filtering feature can reject high frequencies from any selected input

channel. The filtering control is found in the Advanced Channel Options dialog,

which is opened by clicking the Channel Options button ( ) for the relevant

channel on the Channels toolbar. The control determines the cut-off frequency of the

filter, which must be below half the sampling rate shown in the Properties sheet.

For availability, see the Device feature table.

Lowpass filtering is useful for rejecting noise. The split screenshot below shows the

effect of applying a 1 kHz lowpass filter on a noisy signal. The underlying shape of the

signal is preserved but the high-frequency noise is eliminated:

Left: before lowpass filtering. Right: after 1 kHz lowpass filtering.