Tsunami MP-8100 Installation and Management Guide 185
Move the antennas to a different location on the premises. This causes the devices to look from a different angle, causing a
different pattern in the reception of the signals. Use obstructions such as buildings, when possible, to shield from the
interference.
8.4.19.2 Conclusion
A spectrum analyzer can be a great help to identify whether interference might be causing link problems on Tsunami
MP-8100 devices.
Before checking for interference, the link should be verified by testing in an isolated environment, to make sure that the
hardware works and your configurations are correct. The path analysis, cabling and antennas should be checked as well.
Statistics in the web interface under Monitor indicates if there is a link, if the link is healthy, and a continuous test can be
done using the Link Test.
– Base Announces should increase continuously.
– Registration Requests and Authentication Requests should be divisible by 3. WORP is designed in a way that each
registration sequence starts with 3 identical requests. It is not a problem if, once in a while, one of those requests is
missing. Missing requests frequently is to be avoided.
• Monitor / Per Station (Information per connected remote partner): Check that the received signal level (RSL) is the
same on both sides. This should be the case if output power is the same. Two different RSLs indicate a broken
transmitter or receiver. A significant difference between Local Noise and Remote Noise could indicate a source of
interference near the site with the highest noise. Normally, noise is about –80 dBm at 36 Mbps. This number can vary
from situation to situation, of course, also in a healthy environment.
• Monitor / Link Test (Information used by Administrators for on-the-spot checking): Check the received signal level (RSL)
and noise level. Compare the RSL with the values from path analysis. If the figures differ significantly from the values
recorded at the Per Station window, check for environment conditions that change over time.
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