AN-80i
Installation Guidelines
70-00073-01-08-b
Proprietary Redline Communications © 2011
Page
53
of 58
May 27, 2011
Enable Audible Tool Using Web Browser
1.
Start Internet Explorer (or equivalent) on your PC and type the default IP address
(192.168.25.2) in the address bar. Login to the AN-80i with the default user name
'admin' and password 'admin'.
2.
Click on Configure System in the left hand menu.
3.
Find the field 'Antenna Alignment Buzzer Enable' (bottom of screen) and enable this
feature by clicking in the box. A checkmark (
) will appear when the buzzer is
enabled.
4.
Click the Save button (bottom of screen) to activate and save changes.
The audible alignment signal will remain active until this field is disabled.
Enable Audible Tool Using CLI
1.
Start a Telnet session on your PC and type the default IP address (192.168.25.2) in
the address bar. Login to the AN-80i with the default user name 'admin' and
password 'admin'.
2.
Enable the audible alignment tool. The audible alignment signal remains active until
this field is disabled.
set buzzer on
save config
3.
To disable the audible alignment tool, start a Telnet session to the AN-80i and enter
the following commands:
set buzzer off
save config
3.6.6
Antenna Adjustment Using RSSI
Antenna adjustments can also be made based on RSSI measurements reported by the
AN-80i. The RSSI information is available on the Web interface of the AN-80i (System
Status screen), through the CLI interface (stats command), or using the web alignment
tool http://[AN-80i IP]/usr/aa.html).
Note: For PMP deployment, the base station antenna requires only a general alignment.
It is recommended that subscribers, especially those using high-gain antennas, should
be fine-adjusted using the RSSI measurements.
Slowly adjust the antenna elevation, and then azimuth in a broad sweeping pattern,
while observing the peaks and valleys in the RSSI readings.
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 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
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. If the link is non-LOS, a suitable reflecting surface such as
a building or billboard must be used. For non-LOS deployments, it is necessary to install
the link and perform vertical and horizontal sweeps of the antenna to determine if the
required throughput can be achieved.
