[:SOURce]:ILS[:GS|GSLope]:DDM:LOGarithmic <Logarithmic>
The command enters the DDM value in dB. The dB value is calculated according to:
DDM dB = 20 × LOG [(SDM+DDM×100%) / (SDM-DDM×100%)]
A variation of the value automatically leads to a variation of the DDM value and the instrument current.
Parameters: | ||||||||||
<Logarithmic> |
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Example: | ILS:DDM:LOG 1 sets the difference in depth of modulation to 1 dB 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 Logarithmic - ILS-LOC Modulation" |
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