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SPAN-IGM Dual Antenna Chapter 4
SPAN-IGM User Manual Rev 2 39
Figure 8: SPAN-IGM - Dual Antenna Installation
4.2 Configuring ALIGN with SPAN-IGM
Before configuring the ALIGN solution, the SPAN-IGM and the secondary receiver MUST both be
powered on and connected directly between COM 2 of the SPAN-IGM and COM 2 of the secondary
receiver through either a null modem cable or an appropriate radio connection.
To enable the dual-antenna ALIGN solution to aid the INS alignment and provide heading updates, the
offset between the antennas and the SPAN-IGM must be known. This is achieved by entering lever arms
to both antennas, using the SETIMUTOANTOFFSET and SETIMUTOANTOFFSET2 commands.
To configure SPAN with ALIGN Aiding:
1. Enter the lever arm from the SPAN-IGM to the primary antenna (primary antenna is connected to the
SPAN-IGM) using the SETIMUTOANTOFFSET command.
Abbreviated ASCII example:
SETIMUTOANTOFFSET 0.54 0.32 1.20 0.03 0.03 0.05
NovAtel interface cables have more connections than are shown in the diagram. Additional
connections were removed for clarity.
Primary GNSS Antenna Secondary GNSS Antenna
Power Supply
USB
USB
SPAN-IGM
Secondary Receiver
(Master)
(Rover)
SPAN-IGM
ALIGN Cable
(01019089)
The rover receiver must be an ALIGN-capable model, such as D2S-Z00-000, running the
latest OEM6 firmware version.