Blue Sky Network D411, Руководство по установке

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D411 Installation Guide Installation
CONNECTING THE ANTENNA – AN100107
The user must supply the BSN AN-100107 Iridium/GPS antenna (available for purchase from
sales@blueskynetwork.com.) The proper antenna must have:
•
A nominal impedance of 50 Ohms
•
A VSWR less than 2.0:1
•
A gain 0 – 3 dB for optimum performance
•
An SMA female for Iridium and SMA female connector for GPS
•
An active GPS antenna (3.3VDC)
The GPS antenna connector is labelled ‘GPS’. Make certain that the GPS cable is connected to the GPS
output on the antenna to the GPS input on the D411, and that the Iridium cable is connected to the
Iridium connector on both the D411 and the antenna.
Failure to do so can damage both the antenna
and D411.
The antenna must be placed in an area where it can have an unrestricted direct view of the sky for better
GPS/Iridium reception.
It is recommended that the antenna cables are connected prior to
supplying power to the D411 unit.
ANTENNA POSITIONING
For optimum performance, the antenna must be installed on the upper surface of the vehicle and with an
unrestricted view of the sky down to eight degrees above the horizon (similar to a GPS antenna).
Transmission from the antenna may be affected by, and can affect the operation of other systems and it
is the installer’s responsibility to evaluate the location for any possible RF interference. In particular, the
Iridium frequency is near the allocated GPS and Inmarsat band. The antenna should be at least 39 inches
(1 meter) from any L-band antennas, particularly GPS, TCAS and Transponder antennas.
Observe all appropriate sections of AC 43.13-1B and AC 43.13-2A.
Strict maximum attenuation requirements for the coax cable and connectors that link the Antenna to the
D411 Unit must be observed. The signal loss budget, including the antenna cable and all connector, from
the antenna to the D411 Unit is < 2dB @1626MHz.
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