Keysight Technologies FieldFox A Series, User Manual

Page: 195 / 756

Keysight N9927-90001 User’s Guide 195
SA (Spectrum Analyzer) Mode
Channel Measurements
Channel Measurements
The following Channel Measurements are offered in SA Mode:
Channel Power
“Channel Power (CHP)” on page 196
Occupied Bandwidth “Occupied Bandwidth” on page 198
Adjacent Channel Power Ratio “Adjacent Channel Power Ratio (ACPR)”
on page 200
Radio Standards and Channel Measurements
To tune the frequency range of any of the Channel Measurements using
channels instead of frequency, first select a Radio Standard, then select Units =
CHAN. Learn how to select a Radio Standard and channels in “How to select a
Radio Standard” on page 150 .
When you first select a Radio Standard, then select a Channel Measurement:
— With Units = FREQ selected, the center frequency and span will ALWAYS
change to the full frequency range of that standard (Uplink and Downlink)
to allow for a quick scan of energy. The X-axis annotation indicates the
frequency range.
— With Units = CHAN selected, the FieldFox chooses either the uplink or
downlink band, and displays that range of frequencies. You can then tune
within that Standard using Start CHAN, Stop CHAN, or Center CHAN. The
X-axis annotation indicates the frequency range.
When you first select a Channel Measurement , then select a Radio Standard ,
the BW, Offset, RRC, Integration BW, and Span settings are changed to those
of the standard. In addition, Res BW can also change when set to
‘Auto(couple)’. However, center frequency is NOT changed unless you first
select Units = CHAN.
Measurement Preset
Measurement Preset allows you to easily reset any of the channel
measurements to its default settings. The Center Frequency, Preamp ON|OFF,
RF Attenuation, Markers, Limits, and Radio Standard settings are NOT reset.
How to select Measurement Preset:
— Press Preset then Mode Preset
Averaging
By default in ALL Channel measurements, averaging is enabled and set to
display the average of the last 15 measurements. When enabled, this average
setting is automatically making the following ‘averaging’ settings in order to
provide the most accurate power measurements: