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INTRAC-305 TECHNICAL DESCRIPTION
© 2011 Advantech Wireless INTRAC-305 MANUAL - Issue 3.2 Page 63
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illuminated. The alarm may be viewed using the Show Alarms
menu.
The Soft Limits are set in the Configuration - Soft Limits menu.
Note In either Manual (P) or Manual (A) mode the antenna may be
driven through the soft limits with no warning.
AXES POSITION Resolver units are fitted to the driven axes of the antenna.
These units supply positional information to the INTRAC’s
resolver interface circuits.
Depending on the system “Extended Azimuth” or “EG-01”
and/or “Geared Pol” offsets may need to be set.
Fine Tune offsets may be set to calibrate the resolver outputs
to the actual antenna pointing angle.
TRACKING SIGNAL An L-band Integrated Beacon Receiver (IBR-L) is an option
with the INTRAC-305. When fitted this receiver is tuned to an
L-band frequency by the INTRAC based on the “Beacon
Frequency” set for the satellite. If the beacon frequency of the
satellite to be tracked is not in the L-band a Block Down
Converter will be required to convert the signal to L-band.
The calculation of the correct L-band frequency for the IBR-L is
performed automatically by the INTRAC for BDCs with
standard local Oscillator frequencies so that the beacon
frequency may be entered at the actual receive frequency.
Note If an IBR-L is not fitted the INTRAC requires a dc voltage level
which is proportional to the received signal strength from the
satellite.