Keysight N9927-90001 User’s Guide 491
VVM (Vector Voltmeter) Mode - Option 308
VVM Mode Settings
Single or Continuous Measure
This setting determines whether the FieldFox measures 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.
This setting can be changed at any time without affecting calibration accuracy.
How to set Single or Continuous
—Press Meas Setup 4
— Then choose one of the following:
— Single
Automatically sets Continuous OFF and causes the FieldFox to
make ONE measurement, then hold for the next Single key press. The
Hold annotation changes to an arrow --> while the measurement
occurs.
— Continuous OFF
and Hold both put the FieldFox in Hold mode.
— Continuous ON
Makes continuous measurements. This is the typical
setting when battery power is not critical.
— You can also use Run / Hold +/-
to toggle between Single and Continuous.
VVM Calibration
CalReady is accurate for most zeroed VVM measurements at frequencies
below about 6 GHz. For the very highest accuracy, especially above 6 GHz,
then perform a QuickCal or Mechanical Cal. Learn more in “How to Perform a
Calibration” on page 123.
Press Zero OFF before calibrating (sets Zero to OFF).
Zeroing
Zeroing, also known as Normalization, or Data/Memory, simply “Zeroes” the
Magnitude and Phase display when Zero ON
is pressed. All subsequent
measurements are relative to the measurement that was made when Zero was
pressed.
When an instrument state is saved with Zero ON, the zeroing data is saved with
the state file, similar to how a calibration is saved with a state file.
— When performing a 1-Port Cable Trimming operation, a reference cable is
connected and measured. Then Zero is pressed, and subsequent cables are
measured and trimmed to match electrical length of the reference cable.
QuickCal is only available on N991xA/2xA/3xA models.
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