Motorola MOTOWI 4, User Manual

Page: 34 / 198

General Considerations
34
5 General Considerations
5.1 Spectrum Planning
The PTP 500 Series Bridge has four frequency variants in its product range.
Band Definition Frequency
Coverage Variable Channel
Width Channel
Raster
5.4 GHz ETSI 5 GHz band B, USA UNII
Band 5470-5725 MHz 15 MHz 5 MHz
5.8 GHz USA ISM Band / ETSI 5 GHz
band C 5725-5850 MHz 15 MHz 5 MHz
Table 5 PTP 500 Series Bridge Variants
Note: for 5.4 GHz and 5.8 GHz, use of the product is allowed according to local regulations.
There are two distinct approaches to spectrum planning:
•
First an operator can utilize the default spectrum management mode i-DFS (intelligent Dy-
namic Frequency Selection). This mode uses the PTP 500 Series Bridge ability to measure the
interference levels in all channels to build up a picture of the interference / noise levels in all
channels. The PTP 500 Series Bridge uses statistical techniques to select the most appropri-
ate transmit and receive channels. i-DFS can be influenced in its channel decision process by
selectively barring channels from use. The use of this functionality is described in detail in
Section 8.3.7 “Spectrum Management”.
•
Second, when detailed control of the spectrum allocation is required, it is recommended that
the fixed frequency mode is used to statically allocate transmit and receive channels.