CONNECT-OWS Installation Guidelines
70-00200-02-00 Proprietary Redline Communications © 2014 Page 66 of 70 December 3, 2014
set buzzer on
apply
When alignment is complete, use the following command to disable the audible
alignment tool or reboot/power-cycle the wireless terminal.
set buzzer off
save config
Fine Antenna Alignment Using RSSI and SINADR
Fine antenna adjustments can be made based on RSSI and SINADR measurements
reported by the wireless terminal. This information is available on the wireless terminal
Web interface:
Wireless Terminal: System Link Status screen or Web Alignment Tool screen
Base station: Wireless Terminal Links Summary screen
While monitoring the RSSI readings, slowly adjust the antenna elevation and then
azimuth in a broad sweeping pattern. While sweeping the antenna, the RSSI value will
rise when aligned to a sidelobe, and then fall and rise to the highest reading when the
receiver is properly aligned to the main beam. Further movement of the antenna will
cause the RSSI to fall and then rise to a lower peak when aligned to another sidelobe.
When the alignment is complete, tighten each bolt in a cross-pattern to minimize shifts in
the antenna alignment. Tighten all bolts to the recommended torque.
When the alignment sweep has been completed, the measured RSSI value should be
checked against the estimated value obtained from the link budget. If the wireless link is
line-of-sight (LOS), the measured RSSI value should be within 5 dBm of the calculated
value. A lower or fluctuating RSSI value may indicate that the antenna is aligned to a
sidelobe. If the RSSI value is much lower than the link budget prediction, this may
indicate an optical LOS or non-LOS path.
Note: For non-LOS deployments, a suitable reflecting surface such as a building or
billboard must be used. It is necessary to perform vertical and horizontal sweeps of the
antenna to determine if the required throughput can be achieved.
To Next Page
Loading...