YDI EtherLeap, User Manual

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EtherLeap User’s Manual
2.6 Making Final Adjustment to Maximize Received Signal
The purpose of these steps is to adjust the Line-of-Sight of the EtherLeap unit to maximize the main lobe
signal level. During this process, the second EtherLeap unit at the far end of the link must also be at the
same stage of the installation procedure and powered ON.
1. Connect the near end EtherLeap unit to a laptop computer with a network card installed and then run
the signal strength screens off an appropriate Manager program. The Manager program will display
two Received Signal Strength Indicator (RSSI) bar graphs, one for the near end unit and one for the
far end unit. The main goal now is to peak the RSSI signals at both ends of the link.
2. Using the Azimuth adjustment bolts (see Figure 2.8), adjust the azimuth until the RSSI readings for
both ends of the link peak. Start with azimuth adjustment on the far end of the link first. It is
recommended that, in order to ensure the true maximum, you should adjust through the maximum
RSSI reading until the reading clearly drops and continues to drop to lower level side-lobes. Adjust
back until the maximum is attained again. Then repeat for the near end of the link.
3. Using the Elevation adjustment bolt (see Figure 2.8), adjust the elevation until the RSSI readings for
both ends of the link peak. Start with elevation adjustment on the far end of the link first. It is
recommended that, in order to ensure the true maximum, you should adjust through the maximum
RSSI reading until the reading clearly drops and continues to drop to lower level side-lobes. Adjust
back until the maximum is again attained. Then repeat for the near end of the link.
4. Repeat steps 2 and 3 above to guarantee optimum alignment for maximum signal strength.
CAUTION: It is possible to obtain a false peak RSSI reading from the signal of a side-lobe. Up to three
different side-lobes on either side of the main lobe may give false peak alignment readings.
For this reason, it is important that a wide sweep in both azimuth and elevation is made in
order to identify these false peak RSSI readings so to zero in on the true peak alignment
reading due to the main antenna beam.
5. Tighten the two Azimuth adjustment bolts while observing the RSSI reading to ensure the azimuth
alignment does not change while tightening. Torque the two M8 galvanized hex bolts to 24 N-m
(17.7 lb-ft).
6. Tighten the Elevation adjustment bolt while observing the RSSI reading to ensure the elevation
alignment does not change while tightening. Torque the M8 galvanized hex bolt to 24 N-m (17.7 lb-ft).
7.
Test the Link . Prior to placing the link in service for network traffic, the link should be tested using
standard network procedures.
Version 1.0 Page 7 May 2003