Sierra Wireless AirLink MP890, User Manual

Page: 33 / 67

Hardware and Software Installation
Rev 1.0 Mar.10 25
You can also use a ground screw on the connector panel of the MP modem. Use
a 16-gauge wire if you choose to use a ground screw. A ground screw is not
required as long as the power harness is properly grounded.
Figure 4-4: The ground screw connector on the connector panel.
Note: Tighten cables
connected to the MP
modem by hand. Do not
use tools.
Step 2—Mount the antennas and install the
cables
The MP890 modem has Main RF antenna connector and one GPS antenna
connector. The MP WiFi has an additional RF antenna connector for an AP
antenna. The MP modem requires an RF antenna to connect to the wireless
network.
The built-in GPS module requires a dedicated GPS antenna or a combination
antenna with cables to both the Main RF and GPS antenna connectors on the MP
modem.
If you already have an MP modem combination GPS antenna, you can re-use it
with your new MP modem. This antenna has two leads—one for Main RF (TNC
connector) and one for GPS (SMA connector).
Main RF antenna
Use an approved Main 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 characteristics:
• The total maximum gain, including cable loss, must not exceed (if the antenna
operates on the PCS band) or (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 modem supports the following RF bands.
· CDMA Networks:
· HSUPA and UMTS networks:
850 MHz
1900 MHz
2100 MHz
· EDGE and GPRS networks:
850 MHz
If you are using a ground screw,
Power
I/O
insert it here.