The ACMA (Australian Communications and Media Authority) has recently expanded the Low Interference Potential Devices class licence to allow the use of the spectrum between 5470 and 5725 MHz for outdoor use in Australia. There are 5 limitations to be aware of:
1. Maximum EIRP is 1 watt averaged over the transmission burst. This means for a TDD radio with a 50% on/off duty cycle that EIRP can be set to 2 watts.
2. Power density is limited to 50 mW per MHz. This means that if the radio bandwidth is not at least 20 MHz maximum eirp must be reduced accordingly.
3. Radios must use Dynamic Frequency Selection (DFS) to choose a clear channel.
4. We are not permitted to transmit between 5600 and 5650 MHz. This means that any equipment using DFS must be capable of locking out those channels or is not compliant with the requirements of the class licence.
5. The radios must have Automatic Transmit Power Control to reduce transmit power to that needed. If ATPC is not available the EIRP is limited to 0.5 watts.