Keysight N9915-90020 User’s Guide 103
NA (Network Analyzer) Mode
NA Mode Settings
— Point averaging is usually faster than sweep averaging. However,
you may need to increase the Point Average count to obtain the
same level of noise reduction as with sweep averaging.
6. While averaging is in process, press Sweep 3
then Restart to restart the
averaging at 1.
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
1. Press BW 2
> IF BW
2. Then choose from the following:
— 10 Hz | 100 Hz | 1 kHz | 10 kHz | 100 kHz
More 30 Hz | 300 Hz | 3 kHz | 30 kHz
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 aperture. Aperture is set
by specifying a 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 formatEXCEPT Polar or Smith Chart. Learn more about NA Mode
formats, including Group Delay, in
“Format” on page 98.
When enabled,
Smo appears on the FieldFox screen.
How to set Smoothing
1. Press BW 2
> Smoothing ON OFF
2. Then Sm. Aperture and enter a value between 0 and 25 (percent) using
the numeric keypad.
3. Press Enter
Single or Continuous Measure
This setting determines whether the FieldFox sweeps continuously or only once
each time the
Single button is pressed. Use Single to conserve battery power
or to allow you to save or analyze a specific measurement trace.
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