Sierra Wireless AirLink RV50 Series, Hardware User'S Manual, Page: 26 / 78

AirLink RV50 Series Hardware User Guide
26 4117313
To install the antennas:
Note: Take extra care
when attaching the
antennas to the SMA
connectors. Finger tight
(approximately 0. 6 – 0.8
Nm 5 – 7 in-lb./) is suffi-
cient and the max torque
should not go beyond 1.1
Nm (10 in-lb.).
1. Connect the cellular antenna to the SMA cellular antenna connector.
Mount the cellular antenna so there is at least 20 cm between the antenna
and the user or bystander.
2. If used, connect a GPS antenna to the SMA GPS antenna connector.
Mount the GPS antenna where it has a good view of the sky (at least 90
⁰ ).
Note: ALEOS 4.7.0 is configured by default for an active GPS / GNSS
antenna. If you are using a passive antenna, after the gateway is installed,
launch ACEmanager, go to Location > Advanced and set the GNSS Antenna
Bias field to Disable.
3. If used, connect the diversity antenna to the SMA diversity antenna
connector.
Note: If the antenna is located away from the gateway, keep the cables as short as
possible to prevent the loss of antenna gain. Route the cables so that they are protected
from damage and will not be snagged or pulled on. There should be no binding or sharp
corners in the cable routing. Excess cabling should be bundled and tied off. Make sure the
cables are secured so their weight will not loosen the connector from the gateway over
time.
Figure 3-2: Antenna Connectors
Table 3-1: Recommended Antenna Separation
Service Frequency
(MHz)
Wavelength (
λ)
(mm)
Best Antenna
Separation (mm)
(1/2
λ)
Good Antenna
Separation (mm)
(1/4
λ)
LTE 700 428 214 107
LTE 800 375 187 94
LTE 900 333 167 83
LTE 1800 167 83 42
LTE 2100 143 71 36
LTE 2600 115 58 29
Cellular antenna connector
GPS antenna connector
Diversity antenna connector