Harris RF-7800W-OU49 series, Installation & Operation Manual

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2-8
RF-7800W
SYSTEM INSTALLATION
R
2.4.3 Alignment
a. Determining RSSI
Using the audio buzzer works best when the installer is in close proximity to the radio. The buzzer can
be controlled by logging into the radio and navigating to Wireless > Antenna Alignment Buzzer Enable.
It will buzz fast for higher RSSI levels and slow for lower RSSI levels.
Using the radio GUI works best when the installer is too far away to hear the audio buzzer. Launch a
web browser from a computer that is connected to the same network as the radio. Log into the radio and
either click on Links Summary (SPMP SC) or Antenna Alignment (SPMP SS, SPTP SC, SPTP SS).
b. Establish a Preliminary Link
Loosen the long bolts on the mounting bracket to adjust the antenna's azimuth to within a few degrees
of line of sight. Tighten the bolts back up when finished.
Loosen the bolts on the mounting bracket's sides to adjust the antenna's elevation. If the linked radio is
more than 22.5° above or below the horizon, additional hardware may be required to properly aim the
antenna. Tighten the bolts back up when finished.
c. Tips for Fine Tuning the Link
•
Use a pair of installers that are able to communicate with each other.
•
Align one end at a time, starting with the Sector Controller (SC).
•
Monitor changes to one site at the other, i.e. look for the best signal at the SC from the SS radio
and vice-versa.
•
Do not make simultaneous adjustments to the azimuth and elevation.
•
Incrementally adjust the azimuth until the best RSSI is found, then adjust the elevation.
•
If propagation conditions and antenna alignments are good, both RF ports of a given radio should
be within 3 dB of each other.
•
When alignment is complete, lock down all brackets using a wrench.