Guys,
I'm using two different systems to test these radios and Rx's with.
Your going to see a whole lot more on the two companies who supplied us with the test software and hardware. These two companies have really bent over backwards to help us ( FG ) bring as clean an answer as possible to you all regarding the 2.4 Ghz RC systems available.
Todays testing has been a fruitless event in so much as no matter how hard I try there is no way I can get XPS to hop.
Here's the basis of my tests so far.
I am using a device called AIRHORN supplied by
www.nutsaboutnets.com
This device is a selective transmitting device that can:
Transmit on one selected channel ( 1 thru 11 )
It can traverse all the channels sending a fast or slow transition between channels (Traverse mode)
It can pulse on a selected channel (1 thru 11) with a selected duration between 5 and 60 seconds and a selectable wait time between pulses 5 thru 60 seconds.
To see what is happening the guys at Meta Geek supplied us with a Wi Spy unit and a spektrum analyzer. This Chanalyzer as they call it is a full on data recorder and you can leave this thing recording in real time all day if the need arises. That way if you had an event at your field you could easily go back and see what was happening in the area when it happened. Its likely something not many people need to do or want to do but its there if needed. At big events I honestly think it would be good idea while all the 2.4 issues are high on the discussion list.
However the Wi Spy is absolutely a must have tool for those who want to know what the environment is (2.4 Ghz) around them or at the field. It comes in two version. One with a detachable antenna and the other with a built in antenna. The top of the line unit costs little more than a top digital servo so go figure if its worth the effort.
You can find out more about them at
www.metageek.net
OK so what has happened so far.
Lets just stick with XPS for a start so we dont things all mixed up.
XPS does look for clear air on start up. So far I have been able to have it start on 6 of the 11 WiFi channels available. Zigbee channels appear to have 16 on the data logger but I'm not at all knowledgeable enough to go into what the differences are.
OK with the XPS on channel 1 I can bring the noise level up to within 20 DBm of the XPS unit and it will not hop. Pulsing or just a straight hit, it will not move no matter what I throw at it. I dont think I have many more options to make it hop as I have maxed out the power of my AIRHORN. The channels either side of 1 were clean and had limited or no traffic on them at all yet the Tx and Rx would not move.
Given the circumstances in the other tests XPS did not hop when swamped, and it does not appear to hop when the noise floor is ramped up either. I think by pulsing an interfering signal all around the working channel would induce a hop if anything could. Well so far nothing.
I will post a video this evening of the setup and the way I attacked the XPS so you guys can be the judges.
I need a beer, its hot down here guys.