Digital Filter - Picotest M3500A User Manual

Figure 4-2
Remote Interface Operation
From your PC terminal, use the following command to specify the filter
type:
DETector:BANDwidth {3|20|200|MIN|MAX}

4.1.2.2 Digital Filter

Definition:
M3500A uses an averaging digital filter to yield a reading for display from
a specified number of measurement readings in the past. The past
measurement readings are stored in a stack of memory. The number
may be in the range of 2 to 100. You may select one of the two modes
of digital filter operations: Moving Average and Repeating Average.
The moving average filter puts the specified number of reading
conversions in a first-in, first-out order. The very first measurement
reading simply fills up the stack. To yield a reading for display, the filter
produces an average of the stacked measurement readings every time a
new measurement reading is available and replaces the oldest reading in
the stack. In the repeating average mode, the multimeter waits for the
measurement reading stack to fill up and then take an average to
produce a reading for display. It then flushes the stack and starts over
with an empty stack. Consequently, the repeating digital filter yields one
reading for display every specified number of measurement readings.
Digital filter is not available for diode, continuity, frequency and period
measurements.
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