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

Sets 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 applies:

ILS:GS|LOC:DDM:DEPTh = (AM(90Hz) - AM(150Hz))/100%

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

The setting range of DDM depends on the set [:SOURce]:ILS:LOCalizer:SDM.

Parameters:
<Depth>
float
Range: -SDM/100% to +SDM)/100%
Increment: 0.0001
*RST:0
Example: ILS:DDM 0.2

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.

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

 


Imprint | Statement of Privacy | Terms & Conditions© 2016 ROHDE & SCHWARZ