Keysight Technologies FieldFox A Series User Manual page 200

SA (Spectrum Analyzer) Mode
Channel Measurements
— Then
— Enter a value using the numeric keypad,
— Press Enter
Power Percent
This setting specifies the percentage of total measured power to display
between the vertical posts. The measurement defaults to 99% of the occupied
bandwidth power. The remaining power (1% of default setting) is evenly
distributed;.5% of the power on the outside of each side of the vertical posts.
To change Power Percent:
— Press Meas Setup 4
— Then
— Enter a value between 10 and 99.99 using the numeric keypad,
— Press Enter.
Other Occupied Bandwidth 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 Occupied
Bandwidth measurement.
— Learn about Measurement Preset in
— Learn about Averaging in
Adjacent Channel Power Ratio (ACPR)
ACPR measures the power of a carrier channel and the power in its adjacent
(offset) channels. The measurement results can help you determine whether
the carrier power is set correctly and whether the transmitter filter is working
properly.
You can measure the channel power in one, two, or three adjacent (offset)
channels on the low frequency and high frequency side of the carrier channel.
Limits can be used to quickly see if too much power is measured in the
adjacent channels.
200
Freq Span
Power Percent
arrows, or the rotary knob.
arrows, or the rotary knob.
"Measurement Preset" on page
"Averaging" on page 195.
Keysight N9927-90001 User's Guide
195.