R&S SMA100B - Page 616

Remote control commands
R&S
®
SMA100B
616User Manual 1178.3834.02 ─ 09
[:SOURce<hw>]:ILS:LOCalizer:DDM:PCT <Pct>
Sets the difference in depth of modulation between the signal of the left lobe (90 Hz)
and the right lobe (150 Hz). The maximum value equals the sum of the modulation
depths of the 90 Hz and the 150 Hz tone.
See also [:SOURce<hw>]:ILS:LOCalizer:DDM[:DEPTh] on page 617.
Parameters:
<Pct> float
Range: -80.0 to 80.0
Increment: 0.01
*RST: 0
Example: See Example "Configure and generate an ILS localizer signal"
on page 595.
Manual operation: See "DDM Percent" on page 158
[:SOURce<hw>]:ILS:LOCalizer:DDM:POLarity <Polarity>
Sets the polarity for DDM calculation (see [:SOURce<hw>]: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: See Example "Configure and generate an ILS localizer signal"
on page 595.
Manual operation: See "DDM polarity" on page 155
[:SOURce<hw>]:ILS:LOCalizer:DDM:STEP <DdmStep>
Sets the variation step of the DDM values.
Parameters:
<DdmStep> DECimal | PREDefined
*RST: DECimal
Example: See Example "Configure and generate an ILS localizer signal"
on page 595.
Manual operation: See "DDM Step" on page 157
SOURce subsystem