Spectrum Analyzer Mode
R&S
®
Spectrum Rider FPH
173
User Manual 1321.1011.02 ─ 06.00
●
The sweep depends on the span. If you increase the span, you also have to
increase the sweep time.
In its default state, the R&S Spectrum Rider couples the sweep time to the span and
the resolution bandwidth to avoid invalid settings. If the coupling is active, the R&S
Spectrum Rider always sets the shortest possible sweep time to make sure that the
display of the spectrum is correct and valid.
The R&S Spectrum Rider requires a minimum sweep time of 20 ms for every 600 MHz
of span. If you increase the span, the R&S Spectrum Rider will also increase the
sweep time.
In the time domain (span = 0), the R&S Spectrum Rider shows the video voltage over
time. The horizontal axis becomes a time axis that starts at 0 s and ends at the sweep
time that you selected. The range of the sweep time in the time domain is from 34 us to
1000 s.
1. Press the [SWEEP] key.
In the default state, "Auto SWT" is active.
2. Select the "Manual SWT" softkey.
The R&S Spectrum Rider opens an input field to set the sweep time.
3. Enter the sweep time you need.
If the video bandwidth is no longer coupled to the span or the resolution bandwidth,
the R&S Spectrum Rider puts a blue dot at the "SWT" displays on the "Parameter
View".
6.2.5.2
Selecting the Sweep Mode
The sweep mode is the way the R&S Spectrum Rider performs the measurement.
In its default state, the R&S Spectrum Rider measures continuously. In this mode, the
R&S Spectrum Rider automatically repeats the sweep in the defined range of the hori-
zontal axis (frequency or time) and updates the trace accordingly after it has finished
with one sweep.
In some cases, it may be sufficient to get the results over a single sweep only, e.g. if a
particular trigger condition is met. In single sweep mode, the R&S Spectrum Rider per-
forms the sweep a certain number of times (depending on the number of averages you
have set) over the defined range of the horizontal axis (frequency or time) and then
stops measuring. It performs another sweep only after you tell it to. For more informa-
tion on setting the number of sweeps included in a single sweep, see
1. Press the [SWEEP] key.
2. Select the "Single Sweep" softkey.
The R&S Spectrum Rider activates single sweep mode.
3. Select the "Cont Sweep" softkey.
The R&S Spectrum Rider again starts to measure continuously.
Configuring Spectrum Measurements
