Command Set Summary
RU Installation and Antenna Alignment
Trango Broadband Wireless — User Manual TrangoLINK Rev. A for F/W Ver. 1.0
Page 17
The cable ports are purposely located at the bottom of the radio to minimize the risk of water intrusion.
Do not mount
the radios upside down.
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Note: The J-Box is not a weatherized device and must be located either indoors or in a weather-protected cabinet.
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Note: It is important to provide strain relief and drip loop for STP Cat-5 cables.
RU Installation and Antenna Alignment
Once the MU is installed, and aligned in the correct general direction, it is time to install the RU. The hardware
installation of the RU is identical to the MU, including considerations for line-of-sight, cable distances, cable type,
weather sealing, and grounding.
Once the RU is installed and aimed in the general direction of the MU, it is time to perform an RSSI test to determine the
signal strength from the MU, and to precisely align the RU antenna for maximum signal strength.
RU Antenna Alignment Procedure
1. Ensure MU is in opmode “ON”
2. Connect to the RU from the Ethernet side via the Browser Interface (while in opmode “OFF”)
3. Login and observe the RSSI indicator on the bottom left of the page. As you read the RSSI reading, move the
antenna in the horizontal and vertical planes until the maximum RSSI reading is achieved. For short links you
can expect an RSSI of –60 dBm or better. For longer links and RSSI of –75 dBm is acceptable. Any RSSI of
less than –80 dBm may be too weak for the radios to reliably associate and pass data.
4. If it is not possible to receive an adequate RSSI reading, it may be necessary to reorient the MU (up/down,
left/right), to increase the output power of the MU, or to move the RU to a location with better line-of-sight
conditions to the MU.
5. Once you are satisfied with the RSSI reading, tighten down the RU in the optimum position.
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Note: The amber light on the bottom of the RU will also indicate RSSI according to the following parameters:
RSSI< -80dBm
not lit
RSSI > -80dBm
blinking.
RSSI
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-65dBm
solid. (blink rate increases with signal strength.)
Link Test
Ensure the RU’s default opmode is “ON” and that all configuration parameters are correct.
Reboot the radio. Once the radio enters opmode “ON”, the authentication process will occur with the MU, and the two
radios will begin to associate. From the MU side, use the Link Control page to assess the quality of the link. This was
discussed earlier in the Basic Diagnostics section.
If all tests show favorable results, the wireless link will automatically begin passing Ethernet traffic between the
radios.