Spectrum Analyzer Mode
R&S
®
Spectrum Rider FPH
188
User Manual 1321.1011.02 ─ 06.00
The R&S Spectrum Rider turns off the marker search limit function for the selected
marker.
4. To turn off the marker search limits function for all markers, select "All Markers"
softkey and repeat the above steps
6.2.7.8
Using Marker Functions
In addition to the frequency and level readout, the R&S Spectrum Rider provides sev-
eral, more complex, marker functions in spectrum analyzer mode.
Marker function frequency
Marker functions are only applied to the marker position at center frequency.
Deactivating marker functions
Selecting a marker function again while it is still active will turns that marker function
off.
Measuring the Noise Power Density
The marker noise function calculates the noise power density at the marker position in
dBm/Hz. The R&S Spectrum Rider includes several variables in the calculation of the
noise power density, including the trace pixel values, the resolution bandwidth, the
detector and the level display mode (absolute or relative). To stabilize the noise power
display, the R&S Spectrum Rider uses the pixel the marker is on and four pixels to the
right and four pixels to the left of the marker pixel.
Noise power density can provide useful information when you are measuring noise or
digitally modulated signals. However, you get valid results only if the spectrum in the
vicinity of the marker has a flat frequency response. When measuring the noise power
density on discrete signals, results are not valid.
Configuring Spectrum Measurements
