Deployment & Installation RSSI Command and Antenna Alignment
Trango Broadband Wireless — TrangoLINK-45 page 34
Once the site survey is completed, you are ready to install your radios. Typically it is best to install the MU first. To
properly align the radios, use the built-in RSSI tool to achieve maximum signal strength.
1. Ensure MU and RU are in Opmode “ON.”
2. Connect to the RU.
3. Login and type the command rssi. As you read the RSSI, move the antenna in
the horizontal and vertical planes until the maximum RSSI reading is achieved
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.
Example:
#> rssi
Press any key to stop.
0> MU -75 dB RU -75 dB Connected
1> MU -75 dB RU -75 dB Connected
2> MU -73 dB RU -73 dB Connected
3> MU -72 dB RU -71 dB Connected
4> MU -70 dB RU -70 dB Connected
5> MU -70 dB RU -69 dB Connected
6> MU -69 dB RU -70 dB Connected
7> MU -70 dB RU -70 dB Connected
8> MU -70 dB RU -70 dB Connected
9> MU -67 dB RU -68 dB Connected
10> MU -67 dB RU -67 dB Connected
Success.
Users can also view the RSSI LEDs on the bottom of the radio. See the configuration section of this manual for more
information.
Due to FCC restrictions the professional installer must manually set the maximum power for the 5.25 to 5.35 GHz
and 5.47 to 5.725 GHz U-NII bands based upon which external antenna antenna is being used.
In all cases, EIRP cannot exceed +28 dBm. Antenna Gain + Radio Max Power Setting = 28 - Antenna gain + cable loss.
As an example, if the radio is being installed with a 34 dBi antenna with a 1 dB loss cable, then the radio max U-NII
power must be fixed to –5 dBm. The following chart provides additional details.
Antenna Gain
–cable loss
Maximum Allowed
U-NII Tx Power
26 +2 dBm
30 0 dBm
33 -5 dBm