Spectrum Analyzer Mode
R&S
®
Spectrum Rider FPH
123
User Manual 1321.1011.02 ─ 06.00
You can create and edit standards with the R&S InstrumentView and transfer them to
theR&S Spectrum Rider via the USB or the LAN interface. The number of standards
the R&S Spectrum Rider can store in its memory depends on the number of other data
sets stored on the R&S Spectrum Rider.
For more information , see the
Chapter 4.8, "Managing Datasets"
If you make changes to the settings or create datasets, note that:
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The span is always coupled to the channel bandwidth. Changes to either of those
automatically adjust the other (= 5 x channel bandwidth).
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The resolution bandwidth should be between 1 % and 4 % of the channel band-
width. This ensures that the occupied bandwidth is measured with high accuracy.
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The video bandwidth must be at least three times the resolution bandwidth. This
prevents incorrect results due to the compression of signal peaks by the video fil-
ter.
●
You use the RMS detector if possible. This ensures that the power measurement is
always correct irrespective of the waveform being investigated.
●
The sweep time must be set so that the result is stable. If you increase the sweep
time, the R&S Spectrum Rider also increases the integration time for the RMS
detector and thus ensures more stable measured values.
6.1.3.2
Setting the Reference Level
The reference level is the power level that the R&S Spectrum Rider expects at the RF
input. When selecting the reference level, make sure that you do not overload the R&S
Spectrum Rider by applying a signal whose power exceeds the maximum reference
level.
As the power is measured with a small resolution bandwidth compared to the signal
bandwidth, it is still possible to overload the R&S Spectrum Rider, even if the trace is
within the measurement diagram.
To prevent an overload, perform the measurement with the largest resolution band-
width possible using the peak detector. If you set these parameters, it is not possible
for the trace to exceed the reference level.
To simplify operation and to prevent incorrect measurements, the R&S Spectrum Rider
has an automatic routine for setting the reference level.
1. Press the [MEAS] key.
2. Select the "Level Adjust" softkey.
The R&S Spectrum Rider performs a measurement to determine the ideal refer-
ence level.
It uses a resolution bandwidth of 1 MHz, a video bandwidth of 1 MHz and the peak
detector. After finishing the automatic measurement, the R&S Spectrum Rider sets
the ideal reference level.
Performing Spectrum Measurements
