Sierra Wireless MP 875 - Manual (Page 25)

Hardware and Software Installation
The built-in GPS module requires a dedicated GPS antenna or
a combination antenna with cables to both the RF and GPS
antenna connectors on the MP modem.
If you already have an MP Modem Combo GPS antenna, you
can re-use it with your new MP modem. This antenna has two
leads—one for RF (TNC connector) and one for GPS (SMA
connector).
RF antennas
Use an approved RF antenna to connect to the wireless
network. The antenna must have 50 ohms impedance and a
cable with a TNC connector, as well as the following character­
istics:
• The total maximum gain, including cable loss, must not
exceed 4 dBi (if the antenna operates on the PCS band) or
5 dBi (if the antenna operates only on the Cellular band).
• The antenna must transmit and receive on the necessary
frequency bands in your coverage area. The MP 875
modem supports these RF bands:
• HSDPA and UMTS networks:
· 850 MHz
· 1900 MHz
· 2100 MHz
• EDGE and GPRS networks:
· 850 MHz
· 900 MHz
· 1800 MHz
· 1900 MHz
If your MP modem will only be connected to networks that
use one of the bands, an appropriate single-band antenna
is sufficient. Contact your service provider for information
about radio bands used in your area.
For more information about antennas for your installation
contact your account manager.
GPS antennas
The GPS antenna connects to the MP modem using a male
SMA connector. Contact your account manager for more infor­
mation about compatible GPS antennas.
Antenna locations
When selecting locations for the RF and GPS antennas:
• Refer to the documentation provided with each antenna to
determine whether it requires a ground plane.
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