User Manual

Gateway - QSG

GPS Antenna Connection

The Gateway requires an active (amplified)

GPS antenna connected via SMA connector

(10). The Gateway has an integrated GPS

receiver which receives signals from the GPS

satellites and automatically determines the

gateway's location and the current time of day

with great precision.

An external GPS antenna

should be attached to

connector 10; the GPS

antenna should be

positioned such that it has a

clear view of the sky. The

Gateway requires a view of at least 4 GPS satellites to operate properly.

The GPS status LEDs provide visual indication of the GPS receiver status and

the number of satellites in view. If no GPS antenna is connected or if the

antenna cable has a short or open circuit, the red GPS status LED will

illuminate. Additional information about the fault is displayed in System

Manager (see below). If the antenna is connected, one green LED is

illuminated for every two satellites in view:

1 green = 2 satellites

2 green = 4 satellites

3 green = 6 satellites

4 green = 8 or more satellites

Acquiring satellites may take several minutes when the Gateway is first started.

Mesh Antenna Connection

Note: To comply with FCC RF exposure requirements, the Gateway and the antenna for the

Gateway must be installed to ensure a minimum separation distance of 20 cm or more

from a person's body. Other operating configurations should be avoided.

The Gateway requires a 902-928MHz antenna connected via coaxial cable to

the N-type connector (12) on the top of the chassis (see photo above). The

Gateway transceiver communicates with the wireless mesh network via this

antenna. An 8 dBi gain Vertical Antenna is supplied with the Gateway.

Higher gain antennas are not allowed. If a smaller vertical antenna with

less than 8 dBi gain is desired for installation, contact Axiometric for a list

of approved antennas. Only antennas approved by Axiometric are

authorized for use with the Gateway.

The Gateway has built in antenna monitoring circuitry that measures the

efficiency of the antenna and the coaxial cable; if the antenna is missing or if

the connection to the antenna is open or short-circuited, or if the antenna is

positioned in such a way as to make communications ineffective, the Gateway

will light the red fault indicator in the RF Link Status LED bar.

Transmissions are monitored for VSWR and power to ensure an efficient

antenna system is in place; the VSWR and power measurements can be

viewed in the System Manager; this eliminates the need for expensive and