Measurements and Result Displays
R&S
®
FSW-K40
21User Manual 1173.9286.02 ─ 15
Frequency and Level Stability
The stability results show the current level and frequency drift characteristics of the
carrier signal compared to the initial frequency and level. In addition to the numerical
results, the result display also contains a graphical represenation of the drift character-
istics.
The result display contains the following results.
●
Carrier Stability
Difference between the 1st frequency that has been measured and the frequency
that has been measured last.
●
Δ to Ref Level
Difference between the 1st level that has been measured and the level that has
been measured last.
The results correspond to the Level Drift and Frequency Drift results displayed in the
channel bar. For more information see "Channel bar information" on page 11
Note that the results are only valid for I/Q FFT measurements (see "Global Sweep
Mode" on page 45).
Reference Measurement
The reference measurement measures the inherent noise figure (DANL) of the
R&S FSW.
To determine the inherent noise, the application performs a measurement without the
signal at the input. The resulting trace shows the inherent noise of the R&S FSW only.
When you substract that inherent noise from the phase noise of the measurement with
trace mathematics, you get a trace that shows the phase noise of the DUT only.
Remote command:
CONFigure:REFMeas ONCE on page 81
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