Comments

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  Hotwire March 16, 2015 at 2:55pm

  I have written to ACMA and I'm happy to concede I am wrong.

  Attached is the document that ACMA sent to me. It contains schedule 1 radio users regulations and is most likely what you have already referenced or a derivative.

  Thanks Mitchell & Tim. Ego bent but not broken.

  LIPD.pdf
• 

  Duncan Greer March 15, 2015 at 1:27pm

  Its worth noting that the band in Australia is 915 to 928 MHz, as opposed to North america where the band is 902-928 MHz.. perhaps this is where the confusion is coming from??  
• Mitchell Berry March 15, 2015 at 12:32am

  I'm amazed you keep persisting Hotwire, despite so much evidence to the contrary. Tim's link has the actual legislation regarding transmitter power, the law is a much more complicated than your pdf overview.

  Item 52 explicitly says 1W of power at 915 MHz if there is a minimum of 20 hopping frequencies.  

  Item 17 says a max of 25mW for 433Mhz

  52

  Frequency hopping transmitters

  915–928

  1 W

  A minimum of 20 hopping frequencies must be used.

  17

  All transmitters

  433.05–434.79

  25 mW

  The 3DR Radio regulations page says the same and provides settings for telemetry radios used in Australia to comply with these standards. 

  http://copter.ardupilot.com/wiki/common-optional-hardware/common-te...

  Australia	3DR 900	MIN_FREQ: 915000 MAX_FREQ: 928000 NUM_CHANNELS>=20	LIPD-2000 item 52
  Australia	3DR 433	MIN_FREQ: 433050 MAX_FREQ: 434790 TXPOWER<=14	LIPD-2000 item 17
• 

  Hotwire March 14, 2015 at 11:51pm

  Follow the link and know the spectrum HERE
• 

  Hotwire March 14, 2015 at 3:58pm

  Good, I have one in the garage. You can have it. I had this discussion 2 years ago and the answer hasn't changed. Yes there are licenses required if transmitting over set power specs. But it has to be a band you can legally use license or not. 915MHz belongs to Telstra. So call them and ask. I know the answer!
• 

  Warren Eather March 13, 2015 at 9:25pm

  @Dani get the 913Mhz. You won't be disappointed.Happy flying!
• 

  Warren Eather March 13, 2015 at 3:06pm

  You need a licence to transmit on any frequency at any power in Australia. Be it you garage door opener or you home wifi network.
  
  If you are transmitting at frequency below the maximum power level described in the ACMA Radiocommunications (Low Interference Potential Devices) Class Licence then that is the license you have. Free, no paper or little plastic card required.
  
  I've been using and personal prefer the 913mhz because the range you can legally get from 913mhz@1000mW far exceed that of 433mhz&25mW
• Dani March 13, 2015 at 2:16pm

  It seems difficult to obtain clear guidance here. It appears that 433 Mhz requires a licence unless it is somehow used at a lower power. 

  But 915 MHz does not require a license. I'm a total beginner in this field so I can't really twiddle with this and that. It will be challenging enough for me to learn on the Iris+ without also worrying about the frequencies. 

  Am I right that I'm best to go with the 915 Mhz? I 
• 

  Adam Warburton March 13, 2015 at 4:11am

  Wow that's quite impressive! Can't wait to get a set, I feel like having the extra range would be good for peace of mind that I have a solid connection. Also looking into using something like this to be able to receive live telemetry data as well as GPS tracking from a high altitude balloon.
• 

  Warren Eather March 13, 2015 at 3:59am

  At 3:49am on March 13, 2015, Warren Eather said…

  The RFD900 are awesome. Here are some pics of our range testing for the 2014 Outback Challenge. One reciever was on top of a car which drove to 13.5km away. Notice how much S/N was left to burn.

  The output was reduced to 24dbm with an 6dbi antenna. so EIRP 30dbm (1W)

  https://www.flickr.com/photos/109956524@N04/11145678846/

  https://www.flickr.com/photos/109956524@N04/13455342825/