Antenna Medium Adjustment Using The Audible Adjustment Tool; Antenna Fine Alignment Using Rssi And Sinadr - Redline RDL-3000 Installation Manuallines

RDL-3000
5.6.2

Antenna Medium Adjustment Using the Audible Adjustment Tool

Following the basic (coarse) antenna alignment, additional adjustment can be made
using the audible alignment buzzer in the RDL-3000. A faster repetition rate of the
buzzer sound indicates a stronger signal being received from the remote-end
transmitter. Adjust the RDL-3000 antenna using relatively small changes in first the
elevation, and then in the azimuth to obtain the fastest repetition rate. The audible
alignment buzzer is normally turned off and must be enabled using a Web browser or
Telnet session. Use the following steps to enable or disable the buzzer.
Web:
Start a Web browser on the test PC, enter the RDL-3000 IP address in the address
bar, and login to the RDL-3000.
Click Configure ->
Locate the field Antenna Alignment Buzzer Enable (bottom of screen) and click in the
box to enable this feature. A checkmark ( ) indicates the buzzer is enabled.
Click the Apply button (bottom of screen) to activate this change. The audible
alignment signal will remain active until this field is disabled (click to uncheck), or the
RDL-3000 is rebooted/power-cycled.
CLI:
Open a Telnet session on the test PC and login to the RDL-3000.
Use the following command to enable the audible alignment tool. The audible alignment
signal remains active until this field is disabled.
set buzzer on
apply
When alignment is complete, use the following command to disable the audible
alignment tool or reboot/power-cycle the RDL-3000.
set buzzer off
save config
5.6.3

Antenna Fine Alignment Using RSSI and SINADR

Fine antenna adjustments can be made based on RSSI and SINADR measurements
reported by the RDL-3000. This information is available on the RDL-3000 Web interface:
Subscriber:
Sector Controller:
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.
70-00159-01-06
INSTALLATION GUIDELINES
Wireless in the left hand menu.
System Link Status
Subscriber Links Summary
Proprietary Redline Communications © 2012
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of 65 kune 12, 2012