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

The command enters the difference in depth of modulation between the signal of the upper/left lobe (90 Hz) and the lower/right lobe (150 Hz). The maximum value equals the sum of the modulation depths of the 90 Hz and the 150 Hz tone. The following is true for the percentage value:

ILS:GS|LOC:DDM:DEPTh = (AM(90Hz) - AM(150Hz))

A variation of the DDM value automatically leads to a variation of the DDM value in dB and the value of the instrument current.

Parameters:
<Pct>
float
Range: -80.0  to  80.0
Increment: 0.01
*RST:0
Example: ILS:DDM:PCT 20

sets the difference in depth of modulation to 20 percent between the signal of the upper lobe (90 Hz) and the lower lobe (150 Hz) in ILS-GS modulation.

Manual operation: See "DDM Percent - ILS-LOC Modulation"

 


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