Remote Control Commands > SOURce Subsystem > SOURce:ILS Subsystem > [:SOURce]:ILS[:GS|GSLope]:DDM:POLarity
[:SOURce]:ILS[:GS|GSLope]:DDM:POLarity <Polarity>
[:SOURce]:ILS:LOCalizer:DDM:POLarity <Polarity>

The command enters the polarity for DDM calculation (see [:SOURce]:ILS:LOCalizer:DDM[:DEPTh]).

The DDM depth calculation depends on the selected polarity:
  • Polarity 90 Hz - 150 Hz (default setting):
    DDM = [ AM(90 Hz) - AM (150 Hz) ] / 100%
  • Polarity 150 Hz - 90 Hz:
    DDM = [ AM(150 Hz) - AM (90 Hz) ] / 100%
Parameters:
<Polarity>
P90_150| P150_90
*RST:P90_150
Example: ILS:DDM:POL P90_150

selects polarity 90 Hz - 150 Hz

Options: Option R&S SMA-K25
Manual operation: See "DDM Polarity- ILS-LOC Modulation"

 


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