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Secondary antenna
If your system has dual antennas, click the Enable secondary antenna checkbox on the
Secondary Antenna page (Figure 24) to allow the configuration to be entered. If it is not
enabled, the RT will ignore the secondary antenna and will not use it to compute a
heading solution.
Enter the antenna separation and select to position of the secondary antenna relative to
the primary antenna from the drop-down list. The illustrations will change according to
the settings you choose to help visualise the configuration of the antennas.
Figure 24. NAVconfig Secondary Antenna page
The RT does not estimate the distance between the two antennas. It is essential to get this
right yourself, otherwise the system will not work correctly and the performance will be
erratic. The measurement needs to be accurate to 5 mm, preferably better than 3 mm.
A wider separation will increase the dual antenna heading solution accuracy. The
maximum recommended separation is 5 m, giving an accuracy of up to 0.05° in both
static and dynamic conditions
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