Setting The Number Of Averages; Averages Setting Example - Keysight 53147A Operating And Programming Manual

2 Operating Your Instrument

Setting the Number of Averages

You can set the instrument 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.
When a large number of averages is selected for a frequency measurement in
NOTE
combination with a high resolution setting (e.g., 1 Hz), it takes a considerable
amount of time for the instrument 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.

Averages Setting Example

1 Press the Avg key to enter the averages-setting mode.
86
Pwr
Offset
Avg
+/–
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).
Keysight 53147A/148A/149A Operating and Programming Guide