FlyingGiants Forums - View Single Post - Independent tests prove lack of frequency hopping with XPS

sweetpea · 02-09-2008, 01:59 AM

The sky isn't falling buttface, though maybe its getting cloudy

It does appear for now that the system does not hop. One could make a case that 2.4 could have more interference on it than 72, but if it truly does not hop it will act just like 72 during interference. Set your failsafes and your plane is no more a killer than 72. Many places in the world (including the USA) will be just fine for 2.4 while other will not. Its very similar to why some fields have banned individual 72mhz freqs (ch19 for example)....they just don't work there.

Like 72mhz though......it will work fine until it comes across something on its freq (assuming it does not hop like the tests so far have shown) And just like 72mhz there is no way of knowing once you are airborne and flying and your plane goes into lockout is your first clue. If someone turns on the interference your screwed on both....you may have been good today, you may have been good 5mins ago....just no way to know until after the fact. And that my friend is true on 72 or a non hopping XPS.

Now if you want to make the argument that their are better 2.4 options based on interference rejection techniques I'd buy that one. I could even understand at some fields you could treat non interference rejections systems on 2.4 being banned if you have an unusual amount of those systems being shot down due to high noise levels at the particular field. But I wouldn't blanket that across the entire R/C community. We don't do that with individual 72mhz freqs...it needs to be field by field restriction.

(this would affect things like ASSAN and other low end units that only rely on one freq and could affect XPS if no one can prove it does hop)

As for the posts about bodily harm......I'd really like to see these go away. We are about to open a huge can-o-worms on this that will effect all R/C flying. Since anytime we have any kind of lockout or system failure on any brand radio/servo/airplane we could have bodily harm. Didn't we just see the whole lawsuit from Horizon about "Made in USA vs Assembled in USA".....just sit back and think about it closer before comments like that are strewn around the net.
I'm sure your intentions are good but the best intentions usually have the worst outcome in life.

And remember....all of our radios have to abide by the FCC....."accept interference" clause. This one clause is the R/C communities biggest downfall when you start looking at planes that have real potential to inflict harm.

Now just because you accept interference doesn't mean you can't try to avoid it by moving or having backup freqs. But 72 has been using one freq for quite some time, and a great many planes have gone in, be it from radio shoot downs, electrical issues, RF intereference generated from the plane or some wierd unexplained lockout. Are there better options.....depends on your specific radio and the field you fly at. For some XPS could be the best thing. For others it could be the worst choice.

Feel free to keep up the false advertising or false claims......but leave the bodily harm alone.

02-09-2008, 01:59 AM	#541 (permalink)
sweetpea If you can't HUCK it BLING IT! Join Date: Jan 2006 Location: Whidbey Island, WA Age: 34 Posts: 7,333 Awards Showcase Total Awards: 2	Re: Independent tests prove lack of frequency hopping with XPS The sky isn't falling buttface, though maybe its getting cloudy It does appear for now that the system does not hop. One could make a case that 2.4 could have more interference on it than 72, but if it truly does not hop it will act just like 72 during interference. Set your failsafes and your plane is no more a killer than 72. Many places in the world (including the USA) will be just fine for 2.4 while other will not. Its very similar to why some fields have banned individual 72mhz freqs (ch19 for example)....they just don't work there. Like 72mhz though......it will work fine until it comes across something on its freq (assuming it does not hop like the tests so far have shown) And just like 72mhz there is no way of knowing once you are airborne and flying and your plane goes into lockout is your first clue. If someone turns on the interference your screwed on both....you may have been good today, you may have been good 5mins ago....just no way to know until after the fact. And that my friend is true on 72 or a non hopping XPS. Now if you want to make the argument that their are better 2.4 options based on interference rejection techniques I'd buy that one. I could even understand at some fields you could treat non interference rejections systems on 2.4 being banned if you have an unusual amount of those systems being shot down due to high noise levels at the particular field. But I wouldn't blanket that across the entire R/C community. We don't do that with individual 72mhz freqs...it needs to be field by field restriction. (this would affect things like ASSAN and other low end units that only rely on one freq and could affect XPS if no one can prove it does hop) As for the posts about bodily harm......I'd really like to see these go away. We are about to open a huge can-o-worms on this that will effect all R/C flying. Since anytime we have any kind of lockout or system failure on any brand radio/servo/airplane we could have bodily harm. Didn't we just see the whole lawsuit from Horizon about "Made in USA vs Assembled in USA".....just sit back and think about it closer before comments like that are strewn around the net. I'm sure your intentions are good but the best intentions usually have the worst outcome in life. And remember....all of our radios have to abide by the FCC....."accept interference" clause. This one clause is the R/C communities biggest downfall when you start looking at planes that have real potential to inflict harm. Now just because you accept interference doesn't mean you can't try to avoid it by moving or having backup freqs. But 72 has been using one freq for quite some time, and a great many planes have gone in, be it from radio shoot downs, electrical issues, RF intereference generated from the plane or some wierd unexplained lockout. Are there better options.....depends on your specific radio and the field you fly at. For some XPS could be the best thing. For others it could be the worst choice. Feel free to keep up the false advertising or false claims......but leave the bodily harm alone. __________________ Offical Member of Team Caribou Lou *A 'Veteran'* -- whether active duty, discharged,retired, or reserve --is someone who, at one point in his life, wrote a blank check made payable to 'The United States of America,' for an amount of 'up to, and including his life.' That is honor, and there are way too many people in this country today, who no longer understand that fact Last edited by sweetpea; 02-09-2008 at 02:20 AM.