Avionic standards
R&S
®
SMA100B
154User Manual 1178.3834.02 ─ 09
6.4.3.2 Signal settings
Access:
1. Select "ILS Component > Localizer", see Chapter 6.4.3, "ILS localizer settings",
on page 151.
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.......................................................................................................... 154
DDM polarity............................................................................................................... 155
Left Frequency............................................................................................................ 155
Right Frequency..........................................................................................................155
Left/Right Phase..........................................................................................................155
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 %)
ILS configuration and settings
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