Frequency Range; Scale Settings - Keysight N9923A FieldFox User Manual

NOTE Phase is unwrapped by comparing the phase from one data point to the next. If the
phase difference between two data points is greater than 180 degrees, or if the
phase of the first data point is greater than 180 degrees from DC, than the phase
measurement is probably NOT accurate. To ensure that the phase measurement is
accurate, increase the resolution setting. When making a narrowband measurement,
reduce the start frequency for the unwrapped phase measurement to ensure the first
data point is less than 180 degrees from DC.

Frequency Range

Set the range of frequencies over which you would like to make measurements.
When the frequency range is changed after a calibration is performed, the cal
becomes interpolated. Learn more on page 62.
How to set Frequency Range
This can be done in two ways:
 Press Freq/Dist
 Then choose from the following:
1.
2.
 Follow each by entering a value using the numeric keypad, the ▲|▼ arrows, or
 After using the ▲|▼ arrows or the rotary knob, press Enter. The increment
 After using the keypad, select a multiplier key. Learn about multiplier abbreviations

Scale Settings

Adjust the Y-axis scale to see the relevant portions of the data trace. The Y-axis is
divided into 10 graticules.
This setting can be changed at any time without affecting calibration accuracy.
How to set Scale
 Press Scale / Amptd .
 Then choose from the following methods:
1.
2.
3. Set Scale, Reference Level, and Reference Position
NA (Network Analyzer) Mode
and frequencies – Specify the beginning and end of the sweep.
Start Stop
and frequencies - Specify the center frequency and span of
Center Span
frequencies (half on either side of center).
the rotary knob.
setting of the arrows is based on the current span and can NOT be changed in NA
Mode.
on page 19.
Adjusts the Y-axis to comfortably fit the Min and Max amplitude of
Autoscale
the active trace.
Autoscales all of the traces on the screen. Useful for multi-trace
Autoscale All
configurations.
Manually enter a scale per division to view specific areas of the trace.
Scale
o
Manually set the value of the reference line. Enter a negative value by
Ref Level
o
pressing Run/Hold (+/-) either before or after typing a value.
Manually set the position of the reference line. Values must be
Ref Position
o
between 0 (TOP line) and 10 (BOTTOM line)
27