Keysight N9912A User Manual page 45

How to set Averaging
 Press BW 2.
 Then
 Enter a value using the numeric keypad. Enter 1 for NO averaging.
 Press Enter.
 Then
 While averaging is in process, press Sweep 3, then
IF Bandwidth
The FieldFox converts the received signal from its source to a lower intermediate
frequency (IF). The bandwidth of the IF bandpass filter is adjustable. Reducing the IF
receiver bandwidth reduces the effect of random noise on a measurement. However,
narrower IF bandwidths cause longer sweep times.
How to set IF BW
 Press BW 2.
 Then
 Then choose from the following:
Smoothing
Trace smoothing averages a number of adjacent data points to smooth the peak-to-
peak noise values on a displayed trace. The number of adjacent data points that are
averaged is known as the smoothing
percentage of the X-axis span.
Trace smoothing does NOT significantly increase measurement time.
Smoothing is used in Group Delay measurements, although it can be used with any
NA format EXCEPT Polar or Smith Chart. Learn more about NA Mode formats,
including Group Delay, on page 41.
When enabled,
How to set Smoothing
 Press BW 2.
NA (Network Analyzer) Mode
where <n> is the number of measurements to average.
Average <n>
Choose from the following:
Average Mode
Sweep - Each data point is based on the average of the same data point being
o
measured over <n> consecutive sweeps. The average counter shows the number
of previous sweeps that have been averaged together to form the current trace.
When the counter reaches the specified count, then a 'running average' of the
last <n> sweeps is displayed.
Point - Each data point is measured <n> times and averaged before going to the
o
next data point. On subsequent sweeps, averaging restarts by measuring each
data point again <n> times. The average counter is not updated because data is
not displayed until all the averages have been applied.
Point averaging is usually faster than sweep averaging. However, you may need
o
to increase the Point Average count to obtain the same level of noise reduction
as with sweep averaging.
averaging at 1.
IF BW
appears on the FieldFox screen.
Smo
Restart
300 Hz | 1 kHz | 3 kHz | 10 kHz | 30 kHz
aperture. Aperture is set by specifying a
to restart the
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