Keysight Technologies C Series - Page 228

228 Keysight N9915-90020 User’s Guide
SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)FUTURE
Channel Measurements
1. Press Limit 8 > Offset (1,2,3)
2. Then choose from the following:
— LowerOffsetLimit Sets a limit for the lower-frequency offset.
—
Upper OffsetLimit Sets a limit for the higher-frequency offset.
3. Then enter a value using the numeric keypad, arrows, or the rotary
knob.
4. Then
Limit Test ON OFF
Measurement Type
This setting determines how the measured carrier and offset power levels in
the table are presented. (Data in the graphical chart is always presented in
dBm for the carrier and dBc for the offsets.)
To select Meas Type:
1. Press Meas Setup 4
> More > Meas Type
2. Then choose from the following:
— Total Pwr Ref – Integrated carrier power is represented in dBm, and
relative powers between offsets and carrier are represented as dBc
(dB below the carrier).
—
PSD Ref (Power Spectral Density) – Integrated carrier power is
normalized to a 1 Hz density as dBm/Hz using a similar algorithm as
Noise Marker. Learn more about the Noise Marker in
“Noise Marker”
on page 215
.
For both Meas Types, choose the reference for the offset data.
3. Press Ref Value to toggle between these settings:
— Auto - dB or dBc value is computed by subtracting the measured
carrier power from the measured offset power.
— Man – dB or dBc value is computed by subtracting the entered
RefValue from the measured offset power.
— Then enter a value to be used to reference the data using the
numeric keypad, arrows, or the rotary knob.
Other ACPR Settings
All relevant FieldFox settings are made automatically to ensure the highest
accuracy, such as ResBW, VideoBW, and sweep (SwpAcquisition) speed.
These, and all other SA Mode settings, can be changed manually in a ACPR
measurement.
— Learn about Measurement Preset in
“Measurement Preset” on page 221.
— Learn about Averaging in “Averaging” on page 221.