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Optimizing Measurements
Increasing Network Analyzer Dynamic Range
Changing Measurement
In averaging mode, the analyzer measures each frequency point once per
Averaging
sweep and averages the current and previous trace up to the averaging factor
specihed
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:
0
signal-to-noise ratio increases
l
time for each individual sweep remains the same, but
l
total time to update the trace increases.
Averaging is better than system bandwidth reduction at minimizing very
low
frequency noise.
1.
Press
(AVG)
Avlesrags
Fac%ur
.
2. Enter a value followed by
[ENTER).
3.
Press
Amwage
ON
off
.
NOTE
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
“f
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.
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