Operating Your Instrument
2
Keysight 53147A/148A/149A Operating and Programming Guide
87
2 Press the up-arrow or down-arrow key to decrease or increase the value for
the units position of the number of averages.
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 instrument 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 instrument immediately takes
another measurement, discards the oldest measurement included in the
current average computation, recomputes the average and displays the new
NOTE
For most of the instrument’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
1
2
Rel Freq
Avg On
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