Keysight Technologies N9040B UXA Manual page 62

Measurement Related Tasks and Concepts
Setting the Signal Analyzer to Make a Measurement
Item
# Name
2 Freq Mode
3 Freq Context
4 DUT
62
Available
Selections
Swept Points are linearly distributed between the Start and Stop Frequency, where
the number of points is determined by the Points parameter under the
Sweep/Control menu. The Start Freq, Stop Freq, Center Freq, and Span
parameters are coupled.
Fixed A single frequency (supplied by the Fixed Freq parameter) is measured.
List A user-specified list of frequencies is measured. The list of frequencies can be
supplied using the respective SCPI commands, loading the frequency list from
a file, or by entering the data manually into the frequency list. Duplicate
frequencies are not allowed. If the Frequency Context changes, the list values
are recalculated to satisfy the new context.
RF RF refers to the frequency or frequency range before the DUT. In the case of
DSB measurements for a downconverter, the RF frequencies represented are
only that of the LSB Start and Stop range.
If RF is selected as Freq Context, the measurement results will be displayed
with the frequency of the RF frequency settings. If there are frequency
conversions in the measurement system, the frequencies displayed in the
measurement results are different from the input frequency of the analyzer.
IF IF refers to the frequency or frequency range after the DUT. If a system
downconverter is not used, the IF frequency will be the input frequency of the
signal analyzer.
In the case of a system downconverter, IF means before the system
downconverter. Then the input frequency of the signal analyzer will be
determined by the IF frequency and the system downconverter LO, or the
system downconverter IF.
If IF is selected as Freq Context, the measurement results will be displayed
with the frequency of the IF frequency settings. If a system downconverter is
used, the frequencies displayed in the measurement results are different from
the input frequency of the analyzer.
LO LO refers to the frequency or frequency range of the DUT LO. These are not the
frequencies that the analyzer is physically measuring.
If LO is selected as Freq Context, the measurement results will be displayed
with the frequency of the LO frequency settings. This context lets you review
the LO frequencies required to program the external LO or those set by the
analyzer when using an external source control.
Amplifier A device that performs no internal frequency conversion.
Downconv A device that performs internal frequency downconversion.
Upconv A device that performs internal frequency upconversion.
Converter A device that performs multi-stage frequency conversions.
(Multi-Stage)
Description
The Amplifier DUT is for any DUT that does not
perform frequency conversion and includes
amplifiers, filters, attenuators and so forth.
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