Agilent Technologies FieldFox N9913A User Manual

46 FieldFox User’s Guide
How to set Averaging
 Press BW 2.
 Then Average <n> where <n> is the number of measurements to average.
 Enter a value using the numeric keypad. Enter 1 for NO averaging.
 Press Enter.
 Then Average Mode Choose from the following:
o Sweep - Each data point is based on the average of the same data point
being 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.
o Point - Each data point is measured <n> times and averaged before going to
the 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.
o 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.
 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
 Press BW 2.
 Then IF BW
 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 format EXCEPT Polar or Smith Chart. Learn more about NA Mode
formats, including Group Delay, on page 42.
When enabled, Smo appears on the FieldFox screen.

Agilent Technologies FieldFox N9913A Specifications

General

Brand	Agilent Technologies
Model	FieldFox N9913A
Category	Measuring Instruments
Language	English