GW Instek GDM-8200A User Manual - Manual (Page 62)

GDM-8200A Series User Manual
62
Digital Filter Setting
Overview
Filter basic The GDM-8200A series internal digital filter converts the
analog input signal into digital format before passing it to
internal circuits for processing. The filter affects the
amount of noise included in the measurement result.
Filter type The digital filter averages a specific number of input
signal samples to generate one reading. The filter type
defines the averaging method. The following diagrams
show the filter difference as an example of averaging 4
samples per reading.
Moving
(default) Moving filter takes in one new sample and
discards the oldest sample per reading. This
is the default behavior when the digital filter
is not specified, and is recommended for
most applications except for the optional
scanner operation (page71).
1 Sample #
1st reading Sample 1 - 4
2nd reading Sample 2 - 5
3 2 4 5 6 7 8 9 10 11 12
3rd reading Sample 3 - 6
Repeating Repeating filter renews the whole samples
per reading. This method is recommended
when using the optional scanner (page71).
1 Sample #
1st reading
Sample 1 - 4
2nd reading
Sample 5 - 8
3 2 4 5 6 7 8 9 10 11 12
3rd reading
Sample 9 - 12
Filter count Filter count defines the number of samples to be
averaged per reading. More samples offer low noise but
long delay. Less samples offer high noise but short delay.
Range 2 ~ 100