R&S PR100 User Manual
Actual sampling bandwidth compared with selected IF bandwidth
Signal resolution in IF spectrum with digital and analog receiver concept
Panorama scan
The receiver's maximum FFT bandwidth of 10 MHz makes it possible to perform
extremely fast scans across a wide frequency range (panorama scan). For this
purpose, frequency windows of max. 10 MHz width are linked in succession, and
thus the complete, predefined scan range is traversed (see figure "Signal processing
in panorama scan mode"). Same as with the IF spectrum, an FFT is used to process
the broad window with a finer resolution. The width of the frequency window and the
FFT length (number of FFT points) are variable and are selected by the receiver. In
the panorama scan mode, the user can select among 12 resolution bandwidths from
125 Hz to 100 kHz. The resolution bandwidth corresponds to the width of the
frequency slices (bin width) mentioned under "IF spectrum" above. Based on the
selected bin width and start and stop frequency, the R&S®PR100 automatically
determines the required FFT length and the width of the frequency window for each
scan step. The receiver selects these internal parameters so that the optimum scan
speed is achieved for each resolution bandwidth (see figure "Resolution in panorama
scan mode").
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