Keysight N9912A User Manual page 44

You can set the electrical delay independently for each measurement trace. To apply
an electrical delay to all measurement traces, use Port Extensions. Learn how on
page 48.
Phase is available only with S11 measurements – NOT S21.
Learn how to set Phase formats on page 41.
How to set Electrical Delay
 Press Scale / Amptd
 Then
 Then
 Enter a time value using the numeric keypad, the ▲|▼ arrows, or the rotary knob.
 Press a multiplier key. Learn about multiplier abbreviations on page 19.
Electrical Delay can also be set using the Mkr->Delay feature. Learn how on page
155.
Phase Offset
Phase format is available only with S11 measurements. Learn more on page 41.
Phase offset mathematically adjusts the phase measurement by a specified amount,
up to 360°. Use this feature in the following ways:
Improve the display of a phase measurement. This is similar to the way you would
change the reference level in an amplitude measurement. Change the phase
response to center or align the response on the screen.
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 rotary
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.
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More
Electrical Delay
More
Phase Offset
knob. Press Enter
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