User Manual

Deployment
Trango Broadband Wireless — User Manual Access5830 Rev. D
Page 26
Section 7 Deployment
Once you are familiar with the basic operation of the radios you are ready for deployment in the field. The deployment process
consists of the following steps:
?? Site Selection
?? Site Survey
?? Channel Planning
?? SU Antenna Alignment
?? Link Management Commands
Site Selection
Proper site selection for your AP will help ensure a successful deployment. Site selection will depend on a wide variety of factors, but
from the radio’s performance standpoint, please consider the following:
?? Path from AP to SU should provide as few obstructions as possible, thus it is advisable to place AP as high as possible on a
tall building or tower
?? Ethernet cable limit is 300 feet from Ethernet device (router, switch) to radio
?? Radios require grounding for optimal performance
?? AP provides sector coverage of 60 degrees azimuth and 10 degrees elevation
?? Consider nearby sources of interference which could degrade performance of radio. Mount radios as far from sources of
interference as possible
? Note: See Appendix C – RF Primer for more information on site selection.
Site Survey
Both the AP and SU provide a powerful on-board site survey tool. This tool will tell you if there is interference present in the 900 MHz
ISM band.
In order to use the survey command, the radio must be in Opmode “OFF”. The survey can be performed for any specified amount of
time (in seconds) and for either the horizontal or vertical polarization.
Prior to performing the site survey, place the radio in the installation spot, and aim the radio in the desired direction.
After the specified period, the results of this command will provide you with a listing of each channel in the band, the average signal
received, and the maximum signal received during the survey period.
In general you will be looking for frequencies with signal strength of –85 dBm or lower. If interference is present on various channels, it
is recommended that you chose clean channels or alternate polarizations for your deployment. If it is not possible to use a clean
channel/polarization combination, there are various methods available to mitigate the affects of interference. These methods include
the use of the RFRX THRESHOLD settings, or the use of external shields on the AP.
The survey can be run from either the browser interface or the command line interface.
See Example on following page:
#> survey 30 h
Running site survey for 30 secs. Press any key to stop