Avionic Standards
R&S
®
SMA100B
146User Manual 1178.3834.02 ─ 05
"ON"
Modulation of pulsed marker signals (morse coding). The duty cycle,
i.e. the marker on- and off-times, depend on the marker signal fre-
quency (Table 5-3).
Table 5-3: Morse coding for ILS marker beacons marker signals
Marker signal On Off Rate Duty cycle
Outer Marker
(400 Hz)
375 ms 125 ms 2 dots/s 75 %
Middle Marker
(1300 Hz)
First: 375 ms
Second: 83 ms
First: 125 ms
Second: 83 ms
1.5 dots/s 68.8 %
Inner Marker
(3000 Hz)
83 ms 83 ms 6 dots/s 50 %
"OFF"
Modulation of a continuous non-coded marker signal.
Remote command:
[:SOURce<hw>][:ILS]:MBEacon[:MARKer]:PULSed on page 573
5.4.4.3 COM/ID Settings
Access:
1. Select "ILS Component > Marker Beacons", see Chapter 5.4.4, "ILS Marker Bea-
cons Settings", on page 143.
2. Select "ILS > COM/ID".
This dialog provides access to general, signal and COM/ID settings of the marker
beacons component of the ILS signal.
ILS Configuration and Settings
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