AirLink MG90 Hardware User Guide
Rev 3 Feb.17
19
4118699
For regulatory requirements concerning antennas, see
To install the antennas:
1.
Mount the antenna unit(s) on the vehicle (typically multi-element units):
·
Follow the antenna unit’s recommended installation instructions.
·
Use appropriate cable strain relief. (See
·
When mounting antenna unit(s) containing WAN/WLAN cellular antennas,
make sure there is at least 20 cm between the antenna(s) and the user or
bystanders during normal operation.
·
If the unit includes a GNSS antenna, make sure it has a good view of the sky
(at least 90
⁰
).
Note: If single-element antennas are installed, refer to
on page 49 for recommended
antenna separation.
Note: Use the SMA
wrench provided to hand-
tighten the antennas to the
SMA connectors. Do not
over-tighten.
Recommended torque is
0.6–0.8 Nm (5–7 in-lb),
and max torque should not
exceed 1.1 Nm (10 in-lb.).
2.
Connect the cables from the antenna units to their corresponding SMA/RP-SMA
connectors on the MG90’s rear panel.
From left to right (as shown in
·
If used, connect the GNSS antenna to the “GNSS” antenna connector.
·
For the first radio module:
·
Connect the main antenna to the “Cellular A” connector.
·
If used, connect the diversity antenna to the “Diversity A” connector.
·
Connect the Wi-Fi Access Point module’s three antennas to the “Wi-Fi A”
connectors.
·
If used, connect a Bluetooth antenna to the “Bluetooth” connector.
·
For the second radio module:
·
Connect the main antenna to the “Cellular B” connector.
·
If used, connect the diversity antenna to the “Diversity B” connector.
·
Connect the Wi-Fi WAN module’s three antennas to the “Wi-Fi B” connectors.
Note: If the antenna unit(s) is located away from the router, keep cables as short as possible to
prevent the loss of antenna gain. Route the cables to protect them from damage or being
snagged or pulled. 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 router over time.
Figure 2-7: SMA Wrench Usage
Slips over connector
Open channel for cable
Use the wrench to
hand-tighten (or loosen)
SMA connectors