User Manual

General Considerations

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.