User Manual

Table Of Contents
5 General Considerations
39
5 General Considerations
5.1 Spectrum Planning
The PTP 500 Series Bridge has two frequency variants in its product range.
Variant Definition Frequency Coverage Variable
Channel
Width
Channel
Raster
PTP
54500
ETSI 5 GHz Band B
FCC UNII Band
5470-5725 MHz 5, 10, 15
MHz
5 MHz
PTP
58500
ETSI Band,
FCC ISM Band
5725-5875 MHz (ETSI) and
5725-5850 MHz (FCC)
5, 10, 15
MHz
5 MHz
Table 5 - PTP 500 Series Bridge Frequency Variants
NOTE: For PTP 54500 and PTP 58500, 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
Dynamic 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 appropriate transmit and receive channels. The i-DFS mode 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 8.3.7Spectrum 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.
WARNING:This approach must not be used when Radar Detection is enabled.