Trango Broadband M900S - Manual (Page 37)

Deployment
Trango Broadband Wireless — User Manual M900S Rev C Page 33
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
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.
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