Agilent Technologies ENA Series User Manual page 401

Turning on Sweep Averaging
Using sweep averaging also enables you to reduce the effects of random noise on
measurements.
Sweep averaging averages data from each point (vector quantity) based on the exponential
average of a continuous sweep weighted by the averaging factor specified by the user.
Sweep averaging is expressed in Equation 12-1.
Equation 12-1 Sweep Averaging
where:
An = Result of the calculation of sweep averaging for the nth sweep operation at the
point in question (a vector quantity)
Sn = Measurement value obtained at the nth sweep operation at the point in question (a
vector quantity)
F = Sweep averaging factor (an integer between 1 and 999)
Figure 12-2 Effects of sweep averaging
Define the sweep averaging by following the steps below.
Step 1. Press
sweep averaging.
Step 2. Press
Step 3. Press
Step 4. Change the averaging factor in the data entry area.
Step 5. Press
NOTE Pressing
Chapter 12
S
⎛ 1
n
A = ---- - + 1 – -- -
⎝
n
F F
or
.
.
Avg Factor
to turn the averaging.
Averaging ON
resets n to 1 in Equation 12-1 on page 395.
Averaging Restart
Optimizing Measurements
Expanding the Dynamic Range
⎞
×
A
⎠
n 1 –
to select the channel on which you want to define the
395