As mentioned above, the signal analysis allows signal identification with the help of previously detected carriers. Both fluctuating and non-fluctuating carriers can be detected. The carrier candidates can be automatically determined from the spectrum data or are manually inserted. Moreover, a correct detection requires a previously defined threshold, manually inserted in the spectrum chart.
Note
DVB-S1/2 broadcasting are examples of non-fluctuating carrier allocation. Opposed to that, cellular and Wi-Fi standards show fluctuating carriers due to resource allocation via time-division multiple access techniques.
Signal Detection Panel
Spectrum Settings
The update interval and video bandwidth (VBW) settings can be used to smooth a spectrum if necessary. Moreover, the max hold function helps to visualize fluctuating carriers. In addition, the resolution bandwidth (RBW) setting needs to be carefully chosen in order to avoid merged or split carriers. Otherwise a detection may result in insufficient or excessive carriers. The reference level setting also needs to be carefully chosen since it greatly influences the signal-to-noise ratio in a given spectrum.
Detection Controls
The detection is started via the Detect button.
Detected Carriers
The list shows the detected carriers in terms of a center frequency (MHz) and a bandwidth (kHz).
Note
The frequency span and RBW settings can significantly affect a detection time since the latter increases with an amount of spectral data taken from a remote spectrum monitor.
