HP 8712ES User Manual page 235

Changing
Measurement
Averaging
NOTE
In averaging mode, the analyzer measures each frequency point once per
sweep and averages the current and previous trace up to the averaging
factor specified by the user. The instrument computes each data point
based on an exponential average of consecutive sweeps weighted by the
user-specified averaging factor.
As the averaging factor is increased:
• signal-to-noise ratio increases,
• time for each individual sweep remains the same, but
• total measurement time increases.
Averaging is better than system bandwidth reduction at minimizing very
low frequency noise.
1. Press AVG Average Factor
is less than the value displayed on the analyzer screen, followed by
.
ENTER
2. Press Average on OFF
When averaging is on, there is an indicator in the lower right corner of
the analyzer's display. The display is in the form Avg x,y where "x" is
the averaging factor for measurement channel 1, and "y" is the averaging
factor for measurement channel 2. If only one measurement channel is
on, the averaging indicator only displays that channel's averaging factor.
ES User's Guide
Increasing Network Analyzer Dynamic Range
and enter an averaging factor that
.
Optimizing Measurements
5-11