User's Manual

Installing and Connecting an MP-622
Installing an MP-622
Installing and Connecting an MP-622 3 – 15
When aligning the antennas the MP with the antenna that is being aligned to must be set to send
link-calibration packets. Use the following command to setup the MP that the MP-622 is being
aligned with.
set ap num radio num link-calibration mode {enable | disable}
Link-calibration should be disabled under normal operation of the MP.
If the MP-622 is installed with two directional antennas, connect the first antenna to the primary
antenna port with antenna diversity off and align it. Then disconnect the first antenna and
connect the second antenna to the primary antenna port. If the second antenna is being aligned
with a different MP, disable link-calibration on the original MP and enable it on the new MP. Once
both antennas are properly aligned, connect them to their desired ports.
To align the antennas in the link using the output LEDs, start with one antenna fixed and then
perform the following procedure to align the other antenna:
1. Pan the antenna horizontally back and forth while checking the RSSI LEDs. If using the
pole-mounting bracket with the MP-622, you must rotate the mounting bracket around the
pole. Other external antenna brackets may require a different horizontal adjustment.
2. Find the point where the signal is strongest (all LEDs on) and secure the horizontal
adjustment in that position.
3. Loosen the vertical adjustment on the mounting bracket and tilt the antenna slowly up and
down while checking the LEDs.
4. Find the point where the signal is strongest and secure the vertical adjustment in that
position.
Note:
Sometimes there may not be a central lobe peak in the RSSI LED
indicators because vertical alignment is too far off and only two
similar peaks for the side lobes are detected. In this case, fix the
antenna so that it is halfway between the two peaks.