98 Keysight N9927-90001 User’s Guide
NA (Network Analyzer) Mode
NA Mode Settings
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 More
—Then Phase Offset
— Enter a value in degrees using the numeric keypad, the arrows, or the
rotary knob. Press Enter
Averaging
Averaging helps to reduce the effects of random noise on a measurement. You
specify the number of measurements to be averaged. The more measurements
averaged, the greater the amount of noise reduction. An average counter is
shown in the left edge of the screen as Avg <n> where <n> is the number of
measurements that are averaged.
Averaging can be set before or after calibration. When set before calibration,
each calibration standard is measured <n> times and averaged. More time is
needed to perform the calibration, but there will be less noise in the resulting
error terms which means that subsequent measurements will also have less
noise. In addition, noise is further reduced by continuing to average after
calibration.
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:
—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.
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