User's Manual Part 1

Chapter 1: Product description Wireless operation
PTP networks
Using Dynamic Spectrum Optimization
The Dynamic Spectrum Optimization (DSO) feature allows a PTP 650 unit to select wireless
channels for a lower level of radio frequency (RF) interference. This approach is appropriate where
the network consists of a small number of PTP links, or where the RF interference is predominantly
from equipment belonging to other operators.
Using frequency planning
Networks will benefit from the use of fixed channel allocations if (a) the network consists of
multiple PTP links, and (b) RF interference predominantly arises from equipment in the same
network.
Frequency planning is the exercise of assigning operating channels to PTP units so as to minimize
RF interference between links. Frequency planning must consider interference from any PTP unit
to any other PTP unit in the network. Low levels of interference normally allow for stable operation
and high link capacity.
The frequency planning task is made more straightforward by use of the following techniques:
• Using several different channels
• Separating units located on the same mast
• Using high performance (directional) external antennas
For help with planning networks, refer to Chapter 3: System planning, or contact your Cambium
distributor or re-seller.
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