Chapter 3: Planning; Tower Channel Planning - Cambium Networks PMP 400 Series Configuration And User's Manual

PMP 400/430 and PTP 200/230 Series Configuration and User Guide

Chapter 3: Planning

PMP 400 and PTP 200 Series systems use 10 MHz channel bandwidth configurable on 5 MHz channel
centers while the PMP 430 Series is configurable with a 5, 10 or 20 MHz channel bandwidth and the PTP
230 Series is configurable with a 10 or 20 MHz channel bandwidth. When a PMP 430 is configured with 5
MHz channel bandwidth, the radio is configurable on 2.5 MHz center channels and is configurable on 5 MHz
center channels when it is configured for either 10 or 20 MHz channel bandwidth.
This channel size, along with some different characteristics due to the use OFDM carrier technology and
QPSK, 16-QAM, or 64-QAM modulations, supports somewhat different channel planning than for standard
Canopy. (For reference, PMP 100 Series uses 20 MHz channels configurable on 5 MHz centers, single
carrier technology, and 2-level and 4-level FSK modulation.)

Tower Channel Planning

For a single cluster of 4 APs on a tower, 2-channel re-use with channels on 10 MHz channel center spacing
gives good performance. In channel design parlance, this can be stated as ABAB channel planning, with no
guard band needed between A and B. A typical arrangement might be to use radios configured for 5480
MHz aimed north and south, and radios configured for 5490 MHz aimed east and west.
Available 5.8 GHz channel center frequencies for each region are shown in Table 9. These vary by region
due to different band edge RF specifications (for example, between Canada/US and Europe).
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