To Set Up Averaging; To Set The Number Of Points In A Sweep - HP 86140A Series User Manual

Using the Optical Spectrum Analyzer
The Traces Menus

To set up averaging

1 Press the front-panel Traces key.
2 Press the Averaging.... softkey.
3 Toggle averaging
number of measurements to be averaged.
Use the keys to select the number of measurements to be averaged. When the
number of measurements taken is less than the count, the following formula is
used to calculate the data:
If the number of measurements is greater than or equal to the count, the fol-
lowing formula is used to calculate the data:
Averaging values other than those displayed can be entered by using the
numeric keypad or the knob when the Avg Count active function area is dis-
played.

To set the number of points in a sweep

1 Press the front-panel Traces key.
2 Press the Trace Setup.... softkey. The Trace Setup panel will appear.
The Trace Setup panel
3 Enter the desired sweep length in the setup panel. The minimum sweep length
is three points. The maximum sweep length is 10,001 points. Refer to
In a Setup Panel" on page 3-65
in the setup panel.
3-60
or . If averaging is on, softkeys appear to select the
ON OFF
sum of all measurements
AVG = --------------------------------------------------------------------- -
number of measurements
count 1
New average = ----------------------- -
count
for information on changing and selecting items
–
new measurement
×
last average + --------------------------------------------------
count
"To Fill