Campbell Scientific RavenXTG Sierra Wireless Cellular Modem - Manual (Page 10)

RavenXTG GPRS/EDGE Sierra Wireless Cellular Modem
• PN 14394 Raven Mounting Kit—includes mounting hardware for securing
the modem to below-referenced environmental enclosure and a 9-pin male
to 9-pin female cable.
• Antenna—the following antennas are available from Campbell Scientific.
Contact a Campbell Scientific applications technician for help in
determining the best antenna for your application.
o The 20679 is a dual-band, omnidirectional antenna for our CDMA
and GPRS/EDGE digital-cellular modems. It covers both the 800-
MHz band and the 1.9-GHz band. For the 800-MHz band, the 20679
provides a 0-dBd gain. For the 1.9-GHz band, the 20679 provides a
3-dBd gain. This antenna is recommended for locations where
cellular coverage is strong.
The 20679 includes a mount/u-bolt assembly that allows the antenna
to be mounted to a mast, crossarm, or user-supplied pole (outer
diameter of up to 3.8 cm (1.5 in)).
o The 18285 1 dBd omnidirectional antenna. This antenna is dual band,
covering both the 800 MHz and 1.9 GHz bands, and is strongly
recommended where cellular coverage is strong. The 18285 includes
a mount/u-bolt assembly for attaching the antenna to a mast, post, or
crossarm up to 3.8 cm (1.5 in) in diameter.
o The 14454 9dBd Yagi Antenna is a higher gain antenna that should be
“aimed” at the service provider’s antenna. The 14454 is a 800 MHz
antenna and bracket/u-bolt assembly for attaching the antenna to a
mast or post. This antenna is recommended for fringe areas that
require a higher gain antenna.
o The 21831 Half-Wave Dipole Whip Antenna is a lower gain antenna
used in transmitting short distances. It is an 800 MHz cellular antenna
that terminates in a SMA Male connector for attachment to the
modem. This antenna is intended for use inside the enclosure. Please
note that the backplate of the enclosure is a grounded plane. If it is
interposed between the antenna and the cell tower, it may attenuate
the strength of the transmission signal. Simply turning the enclosure
90 to 180 degrees on its mounting mast may solve weak transmission
issues.
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