Aligning the antennas
Chapter 22
FA4800 User Manual
Release 1.9.30
22-3
7. When the SA reads the expected receive signal, the antennas are aligned
and there is an indication of a good link between the sites.
8. Tighten the antenna azimuth axis and elevation axis.
9. Stop the CW function. The NMS will restart the system.
10. Connect FA4800-AIND unit to the external antenna. The operational link
is shown in
Figure 22-1
.
11. Configure FA4800™ NMS at both sites to operate at the pure channel
frequency found in the RF survey. FA4800™ is now ready for operation.
Configuring the Link
1. Run the Installation Wizard in the FibeAir2000 Managerr Software to set
the configuration of the link. Configure the link in accordance with the
parameters calculated in the Link Budget Calculator.
2. FA4800™ has a unique identification number, the Link Name. Each side of
the link looks for its partner with the same Link Name. Therefore both
sides of the link must be configured with the same Link Name.
3. The FA4800™ link is now ready for operation.
Evaluating the Link
With the link operating at a pure channel as determined by the RF survey
procedure, the recommended performance threshold of an FA4800™ link is
the following:
RSS: -84 dBm minimum
There are cases when there is no line of sight, but still the link is of an
acceptable quality.
Troubleshooting
If the link is not within the acceptable limit as defined in the previous sec-
tion,
Evaluating the Link
, check the following:
• Verify that both antennas have the same polarization (horizontal/
vertical).
• Check all the FA4800-AIND cable connectors for faulty connections.
• Verify that there are no obstacles in the Fresnel zone of the antenna
path such as large buildings, trees, etc.
• Use a spectrum analyzer with suitable sensitivity to measure the sig-
nal at the distance between the sites.
• If nothing improves the receive power level, check the overall link.
• Reduce the distance of the link-move the equipment from one site
closer to the other site-where it is possible to actually see the anten-
nas with the naked eye.
• If you now get the expected receive signal level, you can assume
that the equipment is operational, and the problem arises from
interference between the sites.
