Chapter 3: System planning Radio Frequency planning
Page
3-32
Figure 55 and Figure 56 each have three diagrams scaled in meters where Figure 55 is for the sector
antenna and Figure 56 is for cnMedusa. In each figure the distances and heights assume a typical down
tilt of 4°.
In each figure the top diagram represents the clearances required at zero azimuth. The middle diagram
represents the scaling required to the top diagram to allow for differences in azimuth of the considered
reflecting object. The bottom diagram is the scaled version of the top diagram allowing for the dotted
azimuth line in the middle diagram.
PMP 450m Series AP is based on Massive MU-MIMO technology. The 5GHz 450m is a 14x14 MIMO
system which allows simultaneous communication to up to seven SMs. The 3GHz 450m is an 8x8 MIMO
system which allows simultaneous communication to up to four SMs.
Figure 57 PMP 450m Series AP antenna beam
PMP 450m installation recommendations
• For best performance it is recommended to have a clearance zone around the mast. The clearance
zone depends on the surrounding environment and the antenna’s down tilt. If the mast is
surrounded by metal, then larger clearance is required compared to an environment where the
antenna is surrounded by foliage
• SMs should be spread in azimuth of AP antenna
• 450m is susceptible to movement, for best MU-MIMO performance it is recommended that the
450m AP is mounted/installed on a mast that is extremely rigid (no movement and is vertical).
• LINKPlanner can be used to plan SMs across the AP antenna azimuth
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