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Numeric Measurement Modes
R&S
®
EVSG1000
75
User Manual 1178.6227.02 ─ 04
nal Information Service) messages. The Morse code can be used to identify the VOR
station, similar to the
"Morse code identification signal"
The spectrum of a VOR signal is therefore composed of the carrier and three modula-
ted components.
Figure 5-13: Example of the VOR Spectrum
The identical modulation degree m = 0.3 for all three components was selected in
ICAO annex-10 [63] such that the total signal still contains 10% modulation reserve.
The carrier is therefore not suppressed at any time. The 9960
Hz reference carrier is
FM modulated with 480
Hz deviation. The VOR signal generation as under ICAO is
shown below.
Figure 5-14: Basics of the VOR signal generation
VOR Mode (Option R&S
EVSG-K2)