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| Document ID | 3815621 |
| Application ID | YM4RYhXNU31zMCH8df6HCg== |
| Document Description | User Manual - Part 3 |
| Short Term Confidential | No |
| Permanent Confidential | No |
| Supercede | No |
| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 442.32kB (5529035 bits) |
| Date Submitted | 2018-04-13 00:00:00 |
| Date Available | 2018-04-20 00:00:00 |
| Creation Date | 2018-03-21 21:03:52 |
| Producing Software | Adobe PDF Library 11.0 |
| Document Lastmod | 2018-03-21 21:03:54 |
| Document Title | 450 Platform User Guide |
| Document Creator | Acrobat PDFMaker 11 for Word |
| Document Author: | Cambium Networks |
Chapter 6: Installation
Installing external antennas to a connectorized ODU
PMP 450 Series
Assembling the PMP 450 AP antenna
To assemble a PMP 450 Series AP antenna, perform the following steps.
Note
Cambium recommends to assemble the antenna, attach the AP and cabling, and to
seal the RF connections before installing the unit at the deployment site.
Inventory the parts to ensure that you have them all before you begin. The full set of parts
is shown below.
Figure 92 PMP 450 AP antenna parts
Page 6-31
Chapter 6: Installation
Installing external antennas to a connectorized ODU
Begin assembling the upper bracket by attaching the (2) 7” hex bolts to the bracket using
(2) serrated flange nuts
Figure 93 AP antenna upper bracket assembly
Attach the upper bracket to the adjustment
arms using (2) hex bolts, (2) flat washers
and (2) lock washers. Feed the bolt through
the lock washer then flat washer, then
thread the bolt into the upper bracket’s
threaded receptacle.
Figure 94 AP antenna upper bracket
attached to upper adjustment
arms
Page 6-32
Chapter 6: Installation
Installing external antennas to a connectorized ODU
Attach the rear strap to the upper bracket using (2) serrated flange nuts and (1) retaining
bracket. Do not tighten the nuts now.
Figure 95 Rear strap connected to upper AP antenna bracket
Attach the entire upper bracket to the
antenna using (2) hex bolts, (2) flat washers
and (2) lock washers. Feed the bolt through
the lock washer then flat washer, then
thread the bolt into the upper bracket’s
threaded receptacle.
Figure 96 Assembled upper bracket
connected to AP antenna
Page 6-33
Chapter 6: Installation
Installing external antennas to a connectorized ODU
Begin assembling the lower bracket by
attaching the (2) 7” hex bolts to the bracket
using (2) serrated flange nuts
Figure 97 AP Antenna Lower Bracket
Assembly
Attach the rear strap to the bracket using (2)
serrated flange nuts and (1) retaining
bracket. Do not tighten the nuts now.
Figure 98 Lower bracket attached to AP
antenna
Attach the entire lower bracket to the
antenna using (2) hex bolts, (2) flat washers
and (2) lock washers.
Attaching the PMP 450 AP to the antenna
To attach a PMP 450 Series AP to the antenna, perform the following steps.
Page 6-34
Chapter 6: Installation
Installing external antennas to a connectorized ODU
Note
Use shielded cable for all infrastructure connections associated with APs, SMs, and
CMMs. The environment that these modules operate in often has significant unknown
or varying RF energy. Operator experience consistently indicates that the additional
cost of shielded cables is more than compensated by predictable operation and
reduced costs for troubleshooting and support.
Attach the included bracket to the rear of
the AP using the (4) M5 x 7mm bolts
Attach the AP to the antenna by sliding the bracket onto the bolts and tighten the (4)
serrated flange nuts using a 13 mm spanner wrench.
Figure 99 Attaching bracket to the rear of
the AP
Figure 100 Lower bracket attached to AP antenna
Page 6-35
Chapter 6: Installation
Installing external antennas to a connectorized ODU
Note
If using a non-standard antenna, do not cover the equilibrium membrane vent located
on the back of the unit.
Equilibrium Membrane Vent
Figure 101 Mounted PMP 450 AP and antenna assembly, viewed from back and back
Page 6-36
Chapter 6: Installation
Installing external antennas to a connectorized ODU
Attaching the PMP 450 Series AP and antenna to the mount point
Attach the upper bracket of the antenna to the mount point by closing the rear strap around
the pole and tightening the (2) serrated flange nuts using a 13mm spanner wrench. These
must be tightened evenly on the pol to avoid jumping/stripping threads.
Figure 102 Attaching the AP antenna upper bracket to the pole
Attach the lower bracket of the antenna to the mount point by closing the rear strap around
the pole and tightening the (2) serrated flange nuts using a 13mm spanner wrench. These
must be tightened evenly on the pole to avoid jumping/stripping threads.
Figure 103 Attaching the AP antenna lower bracket to the pole
Use a local map, compass, and/or GPS device as needed to determine the direction that one
or more APs require to each cover the 90° sector.
Page 6-37
Chapter 6: Installation
Installing external antennas to a connectorized ODU
Choose the best mounting location for your particular application.
Note
Use the embedded spectrum analyzer or a commercial analyzer to evaluate
the frequencies present in various locations. OFDM APs need not be mounted
next to each other. They can be distributed throughout a given site. However,
the 90° offset must be maintained. If you want to collocate these APs with
PMP 100 Series APs of the 5.4-GHz frequency band range, plan to allow at
least 25 MHz of separation between their center channels.
Secure a ground strap to the ground lug on the back of the AP.
Secure the ground strap to the pole, tower, or other trusted ground.
The bracket of the standard antenna has provision for measured down tilt. The
recommended practice is to use one of the many radio analysis and mapping tools or online tools to calculate down tilt based on antenna height above the service area.
The proper angle of tilt can be calculated as a factor of both the difference in elevation and
the distance that the link spans. Even in this case, a plumb line and a protractor can be
helpful to ensure the proper tilt. This tilt is typically minimal.
The number of degrees to offset (from vertical) the mounting hardware leg of the support
tube is equal to the angle of elevation from the lower module to the higher module (
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