Section 11: Hardware Installation
11.1 Cellular antenna
The selected cellular antenna(s) must meet the following specifications:
•
Maximum rated gain of 3dBi for Cellular band and 4dBi for PCS band
•
Dual-band 800 & 1900 MHz
•
Nominal 50 ohm impedance
•
Voltage Standing Wave Ratio (VSWR) less then 2.5:1
•
Connector:
o
Male SMA connector for 4600/A & 5600/A modems
o
Male TNC connector for 4200 & 5200 modems
The length of the antenna cable may affect the signal strength. Choose the appropriate cable
type and length. The table below provides can help pre-determine the loss to expect.
Cable type
Loss per 100 feet
8216 (RG58)
31 dB
8267 (RG213)
7.6 dB
LMR-400
3.9 dB
LMR-500
3.15 dB
LMR-600
2.5 dB
LMR-1200
1.26 dB
Table 10
Installation and verification
When installing the antenna, follow the
FCC and Industry Canada guidelines
and keep the
following in mind:
•
Mount the antenna(s) at least 30 cm (12 inches) from other antennas
•
Do not install the antenna in a closed metallic enclosure (such as a cabinet or the
trunk of a car).
Once a modem has a signal, the REG LED indicator will start flashing, indicating that the
modem is registered on the cellular network (i.e. within coverage). Additionally,
BlueVue
Device Manager
will display the received signal strength (RSSI) in the top right. The modem
should have at the very least one bar of signal strength.