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Emulate a projected phase shift in your measurement. For example, if you
know that you need to add a cable and that the length of that cable will add a
certain phase shift to your measurement, you can use phase offset to add that
amount and simulate the complete device measurement.
You can set the phase offset independently for each measurement trace.
How to set Phase Offset
Press Scale / Amptd
Then
Then
Enter a value in degrees using the numeric keypad, the ▲|▼ arrows, or the
Averaging
Trace Averaging helps to smooth a trace to reduce the effects of random noise on
a measurement. The FieldFox computes each data point based on the average of
the same data point over several consecutive sweeps.
Average Count determines the number of sweeps to average. The higher the
average count, the greater the amount of noise reduction.
An average counter is shown in the left edge of the screen as Avg N. This 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.
Average Count = 1 means there is NO averaging.
This setting can be changed at any time without affecting calibration accuracy.
How to set Trace Averaging
Press BW 2.
Then
Enter a value using the numeric keypad. Enter 1 for NO averaging.
Press Enter.
While Trace Averaging is in process, press Sweep 3 , then Restart, to restart
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
NA (Network Analyzer) Mode
More
Phase Offset
rotary knob. Press Enter
where N is the current count setting.
Average N
the averaging at 1.
IF BW
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