Trango Broadband M900S user manual AP Search and SU Antenna Alignment, Example

Deployment

Example:\

#> survey 2 v

Press [space] then [enter] to stop

880	MHz	peak	-94 dBm	avg	-99 dBm
882	MHz	peak	-94 dBm	avg	-99 dBm
884	MHz	peak	-94 dBm	avg	-99 dBm
886	MHz	peak	-94 dBm	avg	-99 dBm
888	MHz	peak	-94 dBm	avg	-99 dBm
890	MHz	peak	-94 dBm	avg	-98 dBm
892	MHz	peak	-93 dBm	avg	-95 dBm
894	MHz	peak	-92 dBm	avg	-92 dBm
896	MHz	peak	-91 dBm	avg	-91 dBm
898	MHz	peak	-90 dBm	avg	-90 dBm
900	MHz	peak	-91 dBm	avg	-92 dBm
902	MHz	peak	-92 dBm	avg	-93 dBm
904	MHz	peak	-92 dBm	avg	-93 dBm
906	MHz Ch 1	peak	-92 dBm	avg	-94 dBm
908	MHz	peak	-92 dBm	avg	-94 dBm
910	MHz	peak	-91 dBm	avg	-93 dBm
912	MHz Ch 2	peak	-92 dBm	avg	-92 dBm
914	MHz	peak	-91 dBm	avg	-92 dBm
916	MHz	peak	-92 dBm	avg	-94 dBm
918	MHz Ch 3	peak	-92 dBm	avg	-92 dBm
920	MHz	peak	-92 dBm	avg	-93 dBm
922	MHz	peak	-89 dBm	avg	-90 dBm
924	MHz Ch 4	peak	-89 dBm	avg	-89 dBm
926	MHz	peak	-88 dBm	avg	-90 dBm
928	MHz	peak	-57 dBm	avg	-70 dBm ***
930	MHz	peak	-65 dBm	avg	-66 dBm ***
932	MHz	peak	-69 dBm	avg	-70 dBm ***
934	MHz	peak	-76 dBm	avg	-78 dBm *
936	MHz	peak	-93 dBm	avg	-94 dBm
938	MHz	peak	-85 dBm	avg	-90 dBm
940	MHz	peak	-83 dBm	avg	-88 dBm
942	MHz	peak	-83 dBm	avg	-89 dBm
944	MHz	peak	-94 dBm	avg	-99 dBm
946	MHz	peak	-94 dBm	avg	-99 dBm
948	MHz	peak	-94 dBm	avg	-99 dBm
950	MHz	peak	-94 dBm	avg	-99 dBm

In this example of a survey on vertical polarization for 2 seconds on each 2 MHz portion of the spectrum, the largest amount of interference was detected at frequency 930 MHz (out- of-band).

The asterisks, ****, indicate the highest amounts of interference detected and correspond to the number of yellow colored LEDs lit.

Note that the survey covers spectrum outside the operational range of the

Once the site survey is completed, you are ready to install your radios. It is recommended that APs be installed first. The reason for this is that the SU has a built-in RSSI tool that will help you properly aim the SU at the AP to achieve maximum signal strength.

AP Search and SU Antenna Alignment

Once the AP is installed and aligned in the correct general direction, it is time to install the SU. The hardware installation of the SU is identical to that of the AP, including considerations for line-of-sight, cable distances, cable type, weather sealing, and grounding.

Once the SU is installed and aimed in the general direction of the AP, it is time to perform an RSSI (relative signal strength indicator) test to determine the signal strength from the AP, and to precisely align the SU antenna for maximum signal strength.

Although it is possible to rely upon the SU’s LEDs for alignment, more precise RSSI readings are available from the command ssrssi.

Trango Broadband Wireless — User Manual M900S Rev C Page 33