4 Planning Considerations
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4.4 Variable Channel Bandwidth Operation
Channel bandwidths of 5, 10 and 15 MHz are supported for the PTP 500 product.
Configuration of the variable bandwidth operation must be symmetric, that is, the Transmit
and receive channels must use identical Channel Bandwidths.
For details of the spectrum settings that are available to each frequency variant, refer to:
• Section 16.2.6 PTP 54500 Available Spectrum Settings
• Section 16.3.6 PTP 58500 Available Spectrum Settings
4.5 Link Planning
4.5.1 Link Range
The PTP 500 Series Bridge operates at ranges from 100 m (330 ft) to 250 km (155 miles).
Operation of the system will depend on obstacles in the path between the units. Operation at
40 km (25 miles) or above requires a near line of sight path. Operation at 100m (330 ft) may
be achieved with one unit totally obscured from the other unit, but with the penalty of
transmitting at higher power in a non-optimal direction, thereby increasing interference in the
band.
4.5.2 Obstructions
A survey must be performed to identify all the obstructions (such as trees or buildings) in the
path and to assess the risk of interference. This information is important if you are to achieve
an accurate link feasibility assessment.
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