Math - Smoothing - Keysight Truevolt Series Operating And Service Manual

Features and Functions

Math - Smoothing

(34465A/70A only) Smoothing uses a moving average (boxcar) filter to reduce random noise in meas-
urements. Smoothing is intended to average out small variations in the measurements. Larger variations
will cause the filter to reset.
Press Response to select Slow (100 readings), Medium (50 readings), or Fast (10 readings) to average.
The smoothing filter applies to all measurement functions except Digitizing, Data Logging, Continuity,
Diode, and Probe Hold.
The smoothing filter starts out from a reset condition (no readings in the filter) and is reset if the meas-
urement function is changed or if a reading is too far beyond the current average. After the filter is reset,
the reading is the average of all readings up to the specified response (10, 50, 100). At that point, the read-
ing is the moving average of the last 10 (Fast), 50 (Medium), or 100 (Slow) readings. Equal weighting is
applied to all readings in the average.
The icon (top, right-side of the display) indicates the variation of readings, the amount of allowable
readings in the filter, and when the filter is reset as follows:
Too great of reading variation will constantly reset the filter and the filter icon will be solid yellow (
l
).
As the filter fills with readings, that are within the allowable variation from the readings already in the
l
filter, the filter icon will turn green progressively from left to right(
A single reading, that is beyond the allowable variation from the readings in the filter, will reset the fil-
l
ter and set the filter icon to solid yellow (
If all readings are within the allowable variation from the readings in the filter, the filter icon will be
l
solid green ( ).
108
).
Keysight True volt Series Operating and Service Guide
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