TrangoLINK Apex™ 18 User Manual Rev. 1.0 Section: Chapter 4 - Deployment & Installation Page 54
Antenna Alignment
Aligning narrow beam width (< 2º) over long distances can be a difficult process without
the proper equipment, patience, and a careful process. Using a GPS compass and the
Path Analysis to establish a crude azimuth and elevation the installation crew can
mount the Antenna Assembly (Antenna and Mounting Kit) on the supporting structures
at each end of the link. Once the antennas are installed and a rough antenna alignment
has been established, then the fine alignment process can begin at one end of the link
(typically the site with the smaller antenna). Once one side is aligned to achieve best
RSSI, MSE, and BER then you can adjust the other side to improve the link. Alignment
can be done using the Digital RSSI panel on the Apex Unit.
Antenna Alignment Procedure
1. Ensure that both sides of the link are configured correctly.
2. Connect to the Apex unit from the management port or via the console port.
3. Login and enter config mode. Once in config mode enable the “alignment_mode”
trango login: admin
Password:
Trango Broadband Wireless: TrangoLink APEX Command Line Interface
v1.1.0
(trango-view)# config
Password:
trango-config)# alignment_mode on
alignment_mode: on
SUCCESS
4. Once alignment mode is enabled the digital RSSI panel will update 5 times every
second.
5. Once you are satisfied with the RSSI reading, tighten down the antenna in the
optimum position.
6. Disable the alignment mode
!
WHEN ALIGNING THE ANTENNA THE CLOSER TO ZERO THE BETTER THE RSSI
SINCE THE DISPLAY READ IN NEGATIVE dBm. “80” EQUATES TO -80 dBm WHEREAS
“40” EQUATES TO -40 dBm, AS SIGNAL 10
4
MORE POWERFUL.
