Trying Out the Instrument
R&S
®
FSPN
55
Getting Started 1179.4370.02 ─ 01
3. Define the measurement range with the "Start Offset" and "Stop Offset" prop-
erties.
The application adjusts the measurement range. You can see this change, for
example, in the noise diagram result display.
Note
: In case of baseband measurements, the measurement range is defined
by an absolute start and stop frequency instead of offsets.
For more information on the measurement range, refer to the R&S
FSPN user
manual.
How to search for signals
The application allows you to search for a carrier signal, instead of defining the
carrier frequency manually.
1. Enter the "Overview" dialog box, and from there, enter the "Frequency" dialog
box.
2. Turn on the "Auto Search" feature (it is on by default).
3. Define the frequency range in which the search should take place ("Start" and
"Stop"). By default the search is done in the maximum frequency range sup-
ported by the hardware.
4. Define a "Threshold" for the search. Signals below the threshold are ignored
during the search.
When the application finds a signal with appropriate characteristics, it starts a
phase noise measurement in the
you have defined.
Note
: Automatic signal search is only available in phase noise measurements.
How to define a carrier frequency manually
When you already know the frequency of the carrier signal, you can define it man-
ually and reduce the measurement time.
1. Enter the "Overview" dialog box, and from there, enter the "Frequency" dialog
box.
2. Turn off the "Auto Search" feature.
3. Define the "Signal Frequency".
Measurement Configuration
