User manual

Series 3700 System Switch/Multimeter Reference Manual Section 5: Range, Digits, Rate, Bandwidth, and Filter
3700S-901-01 Rev. C / July 2008 5-9
Moving average filter
The moving average filter uses a first-in first-out stack, where the newest
reading conversion replaces the oldest. An average of the stacked reading
conversions yields a filtered reading. After the specified number of reading
conversions ("Filter count") fill the stack, the moving filter gives a new reading for
every new conversion.
Figure 5-2: Moving average filter
Repeating average filter
The repeating filter takes a specified number of conversions, averages them,
and yields a filtered reading. It then clears its stack and starts over. This setting
is useful when scanning because readings for other channels are not averaged
with the present channel. The stack is then cleared and the process starts over.
NOTE The moving filter cannot be used when scanning (see Scanning (on
page 7-1)). If a scan channel is set up to use the moving filter, the
filter will not turn on.
Figure 5-3: Repeating average filter