Operating Your Frequency Counter 2
Keysight 53150A/151A/152A Operating Guide 81
3 Press the left-arrow key once to move the focus to the tens position, and then
use the up- and/or down-arrow key to set the value for the tens position (if
desired).
Note that the tens and units values are set separately.
4 Press the Enter key to activate your setting and exit the averages-setting
mode.
The Avg On annunciator is activated, and the Counter displays AVERAGING while
it takes the first set of measurements. The length of time that the AVERAGING
message is displayed varies primarily with setting for the number of averages,
since this determines the number of measurements that must be made and
averaged before displaying a result. When the first set of averages is complete
and the result is displayed, the Counter immediately takes another
measurement, discards the oldest measurement included in the current
average computation, recomputes the average and displays the new result.
This continues until you change the setting for the number of averages or
disable averaging (by setting the number of averages to 0).
NOTE
For most of the Counter’s settings, when you continue to press either the
up-arrow or the down-arrow key when you reach the end of the available
settings, the value for the setting “rolls over” to the value at the opposite end of
the range. For example, if the GPIB address is set to 31, and you press the
up-arrow key, the value changes to 1. However, when you adjust the value in
the units position for the number of measurements to be averaged, rollover does
not occur. If you press the up-arrow when the value in the tens position is 0 and
the value in the units position is 9, or if you press the down-arrow when the
value in the tens position is 0 and the value in the units position is 1, there is no
change. If the value in the units position could roll over (in either direction), it
would allow you to set a value of 0 for the number of averages. Since at least
one measurement must be taken, 0 is an illegal value.
Ch 12
Rel Freq
Avg On
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