PRIMUS
r
1000 Integrated Avionics System
A28--1146--112--00
Modes of Operation
8-8
30
30
30
30
AD--50975--R1@
VOR Navigation Mode Tracking
Figure 8--7
When the aircraft approaches a VOR station, it enters a zone of
unstable radio signal, shown in figure 8--8. This zone of confusion
radiates upward from the station in the shape of a truncated cone. In
this area, the radio signal becomes highly erratic and it is best to remove
it from the roll command. The over--station sensors (OSS) monitor
when the aircraft enters the zone of confusion and removes radio
deviation from the roll command. The system also uses the co--located
DME signal (if available), to adjust tracking gains.
When over the VOR station, the system can accept and follow a course
change of up to 90
_
.
