Rohde & Schwarz SMAB-B92 - Page 134

Avionic Standards
R&S
®
SMA100B
132User Manual 1178.3834.02 ─ 05
2. Select "ILS > Amplitude".
This dialog comprises amplitude settings related to the ILS glide slope component
of the ILS signal.
Settings
Sum of Depth.............................................................................................................. 132
FlyMode...................................................................................................................... 132
DDM Step....................................................................................................................133
DDM Current...............................................................................................................133
DDM Depth................................................................................................................. 133
DDM Logarithmic........................................................................................................ 133
DDM Percent...............................................................................................................133
DDM - SDM Coupling..................................................................................................134
Sum of Depth
Sets the arithmetic sum of the modulation depths of the upper lobe (90 Hz) and lower
lobe (150 Hz) ILS glide slope signal contents.
The RMS modulation depth of the sum signal depends on the phase setting of both
modulation tones.
Remote command:
[:SOURce<hw>]:ILS[:GS|GSLope]:SDM on page 559
FlyMode
Selects the simulation mode for the ILS glide slope modulation signal. A change of the
setting automatically changes the sign of the DDM value.
This setting simulates the direction in which the pilot has to correct the course.
"Up"
The 150 Hz modulation signal is predominant, the DDM value is neg-
ative (the airplane is too low, it must climb).
ILS Configuration and Settings