2 Operating Your Frequency Counter
80 Keysight 53150A/151A/152A Operating Guide
Setting the Number of Averages
You can set the Counter to take a variable number of frequency, power,
or voltage measurements and average them mathematically before displaying the
result. You can use this feature to determine the effective measurement of a signal
that is fluctuating. When measuring the frequency of a fluctuating signal, you can
also use averaging to retain some of the precision of a maximum-resolution
measurement.
The default number of averages is 1, which means that no averages are
performed, and the maximum setting is 99. Note that the tens position
(10 through 90) and the units position (0 through 9) are adjusted separately, and
that it is not possible to set the number of averages to 0.
Averages Setting Example
1 Press the Avg key to enter the averages-setting mode.
The current averages setting is displayed (the current value and the indicator
between the arrow keys are flashing to indicate that you can use the up- and
down-arrow keys to change the setting).
2 Press the up-arrow or down-arrow key to decrease or increase the value for
the units position of the number of averages.
NOTE
When a large number of averages is selected for a frequency measurement in
combination with a high resolution setting (e.g., 1 Hz), it takes a considerable
amount of time for the Counter to take the measurements, compute the
averages, and display an initial reading. For example, when the number of
averages is set to 60, and the resolution is set to 1 Hz, the first reading is
displayed after 60 seconds (approximately). Subsequent computations do not
require as much time, since the averaging function computes a running average.
However, the rate at which the display is updated after the initial average
computation is also slower than at lower resolution settings.
Pwr
Offset
+/–
Avg
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