User Manual

Deployment
Trango Broadband Wireless — User Manual Access5830 Rev. D
Page 27
Freq 902 MHz peak -73 dBm max avg -91 dBm
Freq 904 MHz peak -83 dBm max avg -94 dBm
Freq 906 MHz Ch 1 peak -90 dBm max avg -96 dBm
Freq 908 MHz peak -82 dBm max avg -94 dBm
Freq 910 MHz peak -84 dBm max avg -94 dBm
Freq 912 MHz Ch 2 peak -83 dBm max avg -94 dBm
Freq 914 MHz peak -90 dBm max avg -96 dBm
Freq 916 MHz peak -83 dBm max avg -94 dBm
Freq 918 MHz Ch 3 peak -90 dBm max avg -96 dBm
Freq 920 MHz peak -83 dBm max avg -94 dBm
Freq 922 MHz peak -83 dBm max avg -94 dBm
Freq 924 MHz Ch 4 peak -51 dBm max avg -56 dBm ****
Freq 926 MHz peak -60 dBm max avg –72 dBm **
Freq 928 MHz peak –55 dBm max avg –72 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 which 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 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 subscriber unit’s LEDs for alignment, more precise RSSI readings are available from the
command line interface SSRSSI command.
In conjunction with the SSRSSI command, it is also useful to perform the APSEARCH command which will tell you which AP is
providing an adequate signal at the location of the SU.
AP Search
1. Ensure AP is in opmode “AP”
2. Run the APSearch command to verify which AP is providing the strongest signal strength.
Example:
#> apsearch
Ch 1 906 MHz h peak -99 dBm avg -96 dBm
v peak -99 dBm avg -97 dBm
e peak -99 dBm avg -97 dBm
Ch 2 912 MHz h peak -99 dBm avg -97 dBm
v peak -99 dBm avg -97 dBm
e peak -99 dBm avg -97 dBm
Ch 3 918 MHz h peak -99 dBm avg -97 dBm
v peak -99 dBm avg -97 dBm
e peak -99 dBm avg -97 dBm
Ch 4 924 MHz h peak -44 dBm avg -45 dBm B11 A 1 peak -44 dBm avg -45 dBm
rx 1545 pkts
v peak –62 dBm avg -75 dBm
e peak -99 dBm avg -97 dBm
#>
SSRSSI Command for Antenna Alignment
Step 1 Telnet into the SU (while in Opmode “OFF”). Type command ssrssi <channel> <polarization>
In this example of a survey on
horizontal polarization for 30
seconds, the largest amount of
energy is detected on channel 4.
The asterisks, ****, indicate the
highest amounts of energy detecte
d
and correspond to the number of
amber colored LEDs lit.
In this example, an AP is detected on
channel 4, polarization horizontal. Further,
the Base ID is 11, and the AP ID is 1.