Spectrum Analyzer Mode
R&S
®
Spectrum Rider FPH
203
User Manual 1321.1011.02 ─ 11
Measuring the signal bandwidth
The "n dB Down" marker function places two temporary markers to the left and to the
right of the reference marker and measures the bandwidth between the two temporary
markers. The function therefore is a good way to measure the bandwidth of a signal or
the bandwidth of a filter, for example. The temporary markers are represented as two
vertical lines.
The distance to the reference marker is by default 3 dB below the reference marker.
You can also adjust this value manually. Entering a positive value sets the temporary
markers below the reference marker. If it is, for any reason, not possible to calculate
the frequency spacing, dashes are displayed instead of a value.
Upon entering a negative value, the function turns into an "n dB Up" function. You can
use an "n dB Up" function, for example, for measurements on notch filters.
Configuring Spectrum Measurements
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