The Spectrum Application (RF Measurements)
R&S
®
FPL1000
103
User Manual 1178.3370.02 ─ 11
This measurement example shows the different factors influencing the S/N ratio.
Table 6-2: Signal generator settings (e.g. R&S SMW)
Frequency
128 MHz
Level
-95 dBm
1. Preset the R&S
FPL1000.
2. Set the center frequency to
128 MHz
.
3. Set the span to
100 MHz
.
4. Set the reference level to
-30
dBm
.
The signal is measured with the auto peak detector and is completely hidden in the
intrinsic noise of the R&S
FPL1000.
Figure 6-1: Sine wave signal with low S/N ratio
5. To suppress noise spikes, average the trace. In the "Traces" configuration dialog,
set the "Trace Mode" to "Average" (see
The traces of consecutive sweeps are averaged. To perform averaging, the
R&S
FPL1000 automatically switches on the sample detector. The RF signal,
therefore, can be more clearly distinguished from noise.
Measurements and Results
