48
Hardware Installation
Installing Antennas
Figure 55. Antenna Instllation
5
4
3
2
1
Table 7. Antrnna
No
Item
Description
1
WWAN1
Connector for the WWAN1 antenna.
2
WLAN1
Connector for the WLAN1 antenna.
3
GPS
Connector for the GPS antenna.
4
WLAN2
Connector for the WLAN2 antenna.
5
WWAN2
Connector for the WWAN2 antenna.
Selecting an Antenna Site/Location on a Metal Body Vehicle
1. External installation – Check the requirements of the antenna supplier and install the vehicle
antenna external to a metal body vehicle in accordance with those requirements.
2.
Roof top – For optimum performance and compliance with RF Energy Safety standards,
mount the antenna at the center area of the roof.
3. Ensure that the installation surface is grounded by connecting grounding straps between the
surface and the vehicle chassis.
4. Ensure that the antenna cable can be easily routed to the VM-521. Route the antenna cable
as far away as possible from any vehicle electronic units and its associated wiring.
5. Check the antenna location for any electrical interference.
Connecting an Internal WWAN Antenna
If your VM-521 includes an internal Wireless Wide Area Network (WWAN) component, connect the
Mini UHF plug of the antenna to the WWAN jack located on the rear side of the device.
To ensure a secure connection of an antenna cable’s mini-UHF plug to WWAN mini-UHF jack,
their interlocking features must be properly engaged. If they are not properly engaged, the plug
will come loose. Using a tool (pliers or wrench) will not overcome a poor engagement, and is not
recommended.
Connecting an External WWAN Antenna
The WWAN antenna for the VM-521 mobile workstation is an optional component available
through your representative. For WWAN connector locations see
“Installing Antennas”
on page
48.
