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The RSSI connector provides an output voltage between 0 and 3.28 VDC that is
proportional to the received radio signal strength. The higher the voltage reading,
the stronger the signal. The radio signal from the remote antenna can be seen to
have a strong central main lobe and smaller side lobes. The object of the alignment
process is to set the antenna so that it is receiving the strongest signal from the
central main lobe.
Remote
Antenna
Horizontal Scan
Main Lobe
Maximum
RSSI
Voltage
Maximum Signal Strength Position
To align the antennas in the link using the RSSI output voltage, start with one
antenna fixed and then perform the following procedure on the other antenna:
1.
Remove the RSSI connector cover and connect a voltmeter using a cable with
a male BNC connector (not included).
Vertical Scan
for Horizontal Alignment
RSSI BNC
Connection
Align Antennas
Maximum Signal
Strength Position for
Vertical Alignment
RSSI Voltage
Side Lobe
Maximum
Voltmeter
3
3-7
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