User guide

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5.5.5 Raster Considerations
The PTP 400 Series Bridge 5.8 GHz variant operates on a 6 MHz channel raster that is set to
even center frequencies. See
Figure 14.
5.5.6 Fixed Frequency Operation
When operating in ‘Fixed Frequency’ mode (see section
8.3.5.3 “Wireless Configuration”) the
operator can set the operating frequency independently in both directions to any of the center
frequencies available in i-DFS mode using the ‘Default Raster’ setting. For the expert user
further granularity can be obtained by turning off the ‘Default Raster’. In this mode the
operator is able to select any even frequency that sets the channel in-band.
5.5.7 Transmit Power Reduction at the Band Edges
Operation at or near the 5.8 GHz band edges can result in a lower maximum transmit power.
In some configurations the PTP 400 Series Bridge reduces the power when operating at the
edge channels. The amount of reduction if any is dependant on the local regulator authority of
the region of operation. These currently only affect systems configured with Region Code 1.
The power reduction in the edge channels is presented in
Figure 15.
Figure 15 - 5.8 GHz Band Edge TX Power Reduction (Region Code 1 Only)