2 Front-Panel Operation
66 Keysight 34420A Service Guide
To Use Math (Stats)
There are two math operations available, only one of which can be enabled at a
time. The meter can either scale the readings as they are taken, or can keep
statistics on a group of reading. The selected math operation remains in effect
until you disable it, change functions, turn off the power, or perform a remote
interface reset.
The scaling math operation is described in the Keysight 34420A User's Guide. This
discussion applies to stats (statistics) operations only.
Enable the statistics by pressing the key. Read the statistics gathered in the
MATH menu under the STATS command.
After viewing the stored statistics, press (Menu On/Off) to return to the
measurement and continue taking statistics.
After you enable statistics, the first reading that the meter takes is stored as both
the minimum and maximum value. The minimum is replaced with any subsequent
value that is less. The maximum is replaced with any subsequent value that is
greater.
All values are stored in volatile memory; the meter clears the values when stats is
turned on, when power has been off, or after a remote interface reset or preset.
When enabled, the following statistics are available:
Hint You can use the menu recall feature to save steps when using the math
operations. After pressing on the front panel, press (Menu
Recall). The meter will jump to the 1:STATS command and you can press to
MIN minimum reading
MAX maximum reading
AVER arithmetic average of all readings
STD DEV standard deviation of all readings
PEAK-PEAK peak to peak value of minimum and maximum
COUNT the total number of readings
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