R&S SMA100B - Page 132

Avionic standards
R&S
®
SMA100B
132User Manual 1178.3834.02 ─ 09
Chan. LOC Freq. GS Freq. Chan. LOC Freq. GS Freq. Chan. LOC Freq. GS Freq.
28X
28Y
109.10
109.15
331.40
331.25
42X
42Y
110.50
110.55
329.60
329.45
56X
56Y
111.90
111.95
331.10
330.95
30X
30Y
109.30
109.35
332.00
331.85
44X
44Y
110.70
110.75
330.20
330.05
Marker Beacons
Marker beacon receivers are used for a rough distance measurement. They are availa-
ble only for some ILS installations [1MA193].
Figure 6-2: Marker beacon placement and distance to runway
Marker beacon receivers decode audio and provide signaling output to identify one of
three marker beacons installed near the runway. They transmit a narrow beam width at
75 MHz carrier frequency in a vertical direction. Each of them has a different distinct
modulation code to allow the receiver to identify which one it is flying over [1MA193].
Both visual (color of the marker beacon) and audio tone identification is supported for
determining which marker has been flown over. The audio/visual pairing of marker bea-
cons is as follows:
●
Outer marker flashes BLUE in the cockpit at 400 Hz (“relaxed” tone).
●
Middle marker flashes AMBER in the cockpit at 1300 Hz (“hurried” tone).
●
Inner marker flashes WHITE in the cockpit at 3000 Hz (“urgent” tone).
Related Settings
For ILS settings at the R&S SMA100B, see the following sections:
●
Chapter 6.4.2, "ILS glide slope settings", on page 145
●
Chapter 6.4.3, "ILS localizer settings", on page 151
About the Avionics options