Digital filter setting, Th: threshold high, tl: threshold low, Shows the filter count – GW Instek GDM-8261A User manual User Manual

Page 80: Shows the filter type (flashing)

GDM-8261A User Manual

Filter count

Filter count defines the number of samples to be

averaged per reading. More samples offer low noise but
a long delay. Less samples offer high noise but a short

delay.

Range

2 ~ 100

Filter window

Filter window defines the threshold for when the digital

filter data is updated again. When the AD data falls in the
range between TH and TL, the filter keeps processing.

When the AD data falls out of the range between TH
and TL, the filter will restart. When measuring unstable

signals, appropriately setting the filter window can
improve the measurement speed.

Time

AD data

Filter

Restart

TH: Threshold High, TL: Threshold Low

Filter window
Formula

Previous data*(1-window)< threshold< previous
data*(1+window).There are 5 windows range settings

that can be chosen: 10%, 1%, 0.1%, 0.01% and none

Digital Filter Setting

Turn on Filter

1. Press the Shift key followed by

the MX/MN (Filter) key.

/ EXIT

SHIFT

MX/MN

FILTER

1st display

Shows the filter count

2nd display

Shows the filter type (flashing)