CHAPTER 4. CONFIGURING THE ALTUS NR3 AS A ROVER
Step 4: Beam Selection Mode and Service
For SECORX con
fi
guration, select the tab named
SECORX
on the web interface. The default
L-band beam selection mode is
auto
as shown in Figure 4-21. In this mode, the demodulator
will try to lock on to a visible beam, preferring beams to which access has been granted.
In
manual
mode, the demodulator will attempt to lock on to the beam selected from the
Manual beam selection
drop-down list ignoring all other beams. The beams in this list
can be pre-set in the
Advanced Settings
expandable
fi
eld. A beam is characterized by a
frequency and data rate.
Figure 4-21:
Selecting the L-Band beam
Without a SECORX subscription, the Altus NR3 will still be able to track visible L-Band signals.
Figure 4-22 shows the L-Band Tracker Status
fi
eld when the Altus NR3 is locked onto signals
from the 25E satellite which transmits at 1545.825 Mz. After purchasing a subscription you
will need to track one of the beams for activation over the air. To guarantee successful
activation, the LBand signal should be received with a carrier-to-noise ratio of 36 dB-Hz or
higher.
Figure 4-22:
L-Band Tracker Status
fi
eld when locked on to an L-Band signal
Step 5: Verifying the configuration
With a valid SECORX subscription, the Altus NR3 will be able to decode PPP correction data.
The
Access
line in the
L-band decoder Information
fi
eld should show
Access Enabled
as
depicted in Figure 4-23. After a few moments, the Altus NR3 positioning mode should change
to PPP as indicated by the highlighted icon in the upper status
fi
eld.
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