Campbell Scientific Raven100 CDMA Cellular Modem - Manual (Page 8)

Raven100 CDMA AirLink Cellular Modem
PN 18663 null modem cable connects the modem to a datalogger's
RS-232 port (not compatible with the 21X, CR510, CR10X,
or CR7 dataloggers).
FIGURE 4.2-1. Modem Interface Options.
• PN 13493 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 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 10 feet of cable fitted with a TNC male connector
for attachment to the Raven, and a mount/u-bolt assembly for
attaching the antenna to a mast, post, or crossarm up to 1.5" (3.8
cm) 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
includes 10 feet of cable fitted with a TNC male connector for
attachment to the CDMA modem, and a 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 14453 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 TNC Female connector for
attachment to the Redwing 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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