Motorola PTP 400 Series Manual De Usuario

 

 

37

5 

General Considerations

 

 

5.1 Spectrum 

Planning

 

 

The PTP 400 Series Bridge has three frequency variants in its product range. 

4.9 GHz  USA National Public Safety Band 

4940-4990 MHz 

10 MHz 

5 MHz 

5.4 GHz  ETSI 5 GHz band B 

5470-5725 MHz 

11 MHz 

12 MHz 

5.8 GHz  USA ISM Band / ETSI 5 GHz band C 

5725-5850 MHz 

11 MHz 

6 MHz 

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 400 Series Bridge’s ability to 

measure the interference levels in all channels to build up a picture of the interference / noise 

levels in all channels. The PTP 400 Series Bridge uses statistical techniques to select the 

most appropriate 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 8.3.8 “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.