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GeminiG3 - User Manual
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2.5.3 Antenna Installation
1.
Route good quality 50-ohm coaxial cables (e.g. RG-223) from each of the selected antenna posi-
tions to the position where the GeminiG3 unit is mounted.
2.
Terminate the end at each of the antenna positions with the appropriate connector for the antenna
used and make the connection.
3.
At the GeminiG3 unit position, cut the three cables to length and terminate with the appropriate
plug. For the transceiver and the auxiliary cables, use the proper crimp plug for the connections
present on the radiomodem. For the GPS
4.
Positively identify
the transceiver plug and connect to the left rear of GeminiG3 unit.
5.
Positively
identify
the auxiliary receiver plug and connect to the front left of GeminiG3 unit to
the RX position.
6.
Connect the SMA connector to the GPS position below the auxiliary connector position.
7.
Do not skip this last step, trust us; it is an important one.
To complete the installation, tie-wrap
together the auxiliary and the GPS antenna cables at a point about two inches in front of the unit.
It will be much easier hereafter to correctly identify which plug goes where. You DO NOT want
to cross the auxiliary plug with the transceiver plug.
2.6. Completing the physical Installation
To complete the physical installation and prior to testing the GeminiG3 radiomodem:
•
Connect DC Power cable’s connector to the GeminiG3 unit connector until you hear a click
as the two parts snap together.
•
Re-check that all other connections are secure (antennas, PC, etc.)
•
Switch vehicle ignition ON.
You are now ready to check for normal operation and to run the GeminiG3 Web Interface program
for testing or trouble-shooting
2.7. Checking out Normal operation
Check that the vehicle ignition is ON.
1.
Check for proper operation of the GeminiG3 LEDs as per Table 2 on page 14.
2.
Using the GeminiG3 Web Interface program and an in-line wattmeter, check forward & reverse
power to confirm main antenna installation (as per section 4).
3.
Check the RF Data Link with a base station that can be heard (see section 4.7.7.1).
4.
If user application and its base station are available, test the installation by going through a nor-
mal sequence of transmitting and receiving messages.