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| 2.4 Ghz Spread Spectrum Technology Discuss Spektrum, Futaba FASST, and all of the exciting 2.4 transmitter/receiver technology here! |
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| | #577 (permalink) |
| Bad-ass Super Contributer! ![]() | Great info Kiwi!! Looking forward to reading more.. Here is a question--does Spektrum toggle back and forth between the 2 channels it picks when it first links up ? Meaning during a flight if the first channel is swamped and it goes to the second channel, does it stay locked onto it (2nd channel) for the duration of the flight ?
__________________ Some people are only alive because its illegal to shoot them. _____ Joe |
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| | #578 (permalink) | |||||||||||||||
| Bad-ass Super Contributer! ![]() | Someone else may have made the xps system hop although it's under strange circumstances...
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| | #579 (permalink) |
| Gettin' Lower! ![]() | Kiwi, Since someone from RCG was able to make XPS hop by using the FASST signal as the noise source, maybe aside from your plan of subjecting the XPS to a '3D' noise that you can also consider subjecting XPS to a repeatitive (off-and-on) low-level noise. Since FASST is actually hopping all around the entire band, it will mean that it hit the frequency which XPS is currently using so many times in a given time period. So, maybe (just maybe) if XPS is hit by a 'repeatitive' short-burst, low-energy noise then eventually the hopping is triggered. Of course, IMO, this doesn't make sense in real application. Just a thought.. ^R^. Edit: I just thought of this while posting in another forum... I think I remember XPS saying that the 'counter' is reset when there is a sudden rise of noise. Now, that makes me wonder about this counter... is it a 'counter' of occurence? If so, maybe it's keeping count of the short-burst noise and a threshhold is set. Maybe once the count of occurences hit the threshhold then the hopping is triggered? ++++ Last edited by ricoalonso : 02-10-2008 at 08:27 PM. |
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| | #580 (permalink) | ||||||||||||||||||
| Inverted over Whidbey Island ![]() |
Here is a good link that will show you all the available freqs and the number that is associated with them. http://rcsource.hobbypeople.net/faqs/freqlist.htm | ||||||||||||||||||
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| | #581 (permalink) | ||||||||||||||||||
| Bad-ass Super Contributer! ![]() |
AAHHH!!.....i get it! After running the 1/8 scale buggies and truggies for about 4 years , i didn't know this. thanks for the info man. | ||||||||||||||||||
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| | #582 (permalink) |
| Inverted over Whidbey Island ![]() | No prob. Back to the Hopping of XPS...... This most recent test was a little vague on details but here is the skinny. A guy turned on XPS...noted it was on Ch 10. Then he turned on a FASST system. He noticed RF on all the available freqs (though it was very low in power). Assumed it was FASST hopping around. He then turned off FASST and noticed that XPS was now on Ch 20(or was it 30?). This wasn't a very technical test at all and it raises more questions. |
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| | #583 (permalink) | ||||||||||||||||||
| Gettin' Lower! ![]() |
This is why in my post #579 above, I am requesting Kiwi for another test scenario. I am just thinking, that maybe XPS is using a noise occurence counter and a threshhold set for occurences to trigrer a hop. ^R^ | ||||||||||||||||||
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| | #585 (permalink) | ||||||||||||||||||
| Gettin' Lower! ![]() |
But as for the hopping, I still think that maybe by applying multiple short-bursts, low-level (just enough for XPS to notice but not enough to lockout) noise to XPS for several times within a time period may trigger the hop. I think that's why JD made mention of a 'counter' being reset if the noise has sudden rise. ^R^ Last edited by ricoalonso : 02-10-2008 at 10:09 PM. | ||||||||||||||||||
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| | #586 (permalink) | ||||||||||||||||||
| I don't do "custom" user title ![]() |
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| | #587 (permalink) |
| Pimpalicious ![]() | Would you guys trust the XPS in 35% and up planes? Toy planes are least of my concerns now but I do have a system close to being ready in a smaller plane.
__________________ Dont Hate, pay away, make a pimp, pockets straight VISA, check, cash, any city, any state...8 Ball & MJG www.parialconstruction.com www.wildharerc.com www.DaltonAviation.com www.TroyBuiltModels.com |
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| | #588 (permalink) |
| Bad-ass Super Contributer! ![]() | This thread is now getting to be very interesting reading and I'm fairly certain that (by now) JD is watching. Wonder why the company doesn't defend it's product ? I've wondered this throughout this entire thread. |
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