Rohde & Schwarz SMAB-B92 - Page 139

Avionic Standards
R&S
®
SMA100B
137User Manual 1178.3834.02 ─ 05
2. Select "ILS > Signal".
This dialog comprises audio signal and modulation settings related to the ILS local-
izer component of the ILS signal.
Settings
Operating Mode.......................................................................................................... 137
DDM polarity............................................................................................................... 138
Left Frequency............................................................................................................ 138
Right Frequency..........................................................................................................138
Left/Right Phase..........................................................................................................138
Operating Mode
Selects the operating mode for the ILS localizer modulation signal.
"Norm"
ILS localizer modulation is active.
"90 Hz"
Amplitude modulation of the output signal with the left lobe (90 Hz)
signal component of the ILS localizer signal.
The modulation depth of the 90 Hz signal results from the settings of
parameters Sum of Depth and DDM Depth according to:
●
"Fly > Right"
AM (90 Hz) = 0.5 × (SDM + DDM × 100 %)
●
"Fly > Left"
AM (90 Hz) = 0.5 × (SDM - DDM × 100 %)
"150 Hz"
Amplitude modulation of the output signal with the right lobe (150 Hz)
signal component of the ILS localizer signal.
The modulation depth of the 150 Hz signal results from the settings of
parameters Sum of Depth and DDM Depth according to:
●
"Fly" = "Right"
AM (150 Hz) = 0.5 × (SDM + DDM × 100 %)
●
"Fly" = "Left"
AM (150 Hz) = 0.5 × (SDM - DDM × 100 %)
ILS Configuration and Settings