Independent tests prove lack of frequency hopping with XPS

[GBR2]

At the time Tychoc and Kiwi were doing their tests looking for the ability of XPS to move to another "channel" when encountering an interfering signal, they were doing so based on JD statements like this:

"We are the ONLY 2.4GHz system that has the ability to monitor the available frequencies in the 2.4GHz range and change as necessary, in real time. This means that the plane as well as the transmitter can make the change occur. If you flew your plane over a school with a huge 14dbi external 802.xx antenna, that would likely be cause for switching to a new frequency (away from whatever channel that 802.xx was on)"

So in reality, they were testing for XPS hopping. It was only later that JD starting saying that XPS's ability to "hop" required these mysterious circumstances, which he refused to say what they were. Only much later did he start to reveal what was needed and then admitting that the hopping scheme was more a range extension scheme than one really designed to counter interferance. The end result really is that whatever ability XPS has to hop is just not a useful ability.

[Edge 540]

	Quote: Originally Posted by Dustflyer
	I think this guy is just messing with us. Scubacb? I wonder. Could he and all the rest really be JD under different member names? I am beginning to have my suspicions.

Yeah, like I pointed out several pages ago. There are about a half dozen fg members who spontaneously show up, post ONLY on 2.4 related discussion supporting or defending XPS and never venture anywhere else. It's a shame really. FG is such a great site with so many other topics/ videos/ pics etc etc etc.

Do they really think it isn't obvious what they're doing?

[Toumal]

	Quote: Originally Posted by skubacb
	What I want is proof of a specific error or problem not conjecture, stories or lies.

Dude, I'm telling you: as long as the receiver and transmitter need a working link to be able to hop, there will be situations when XPS should hop, but can't. JD himself has stated that a "slowly rising" interference is what XPS needs to hop. Use logic thinking.
The antenna has a severe falloff when the tip points at you, and the attenuation can be severe enough for you to lose the signal. Do a range check with various antenna orientations if you don't believe me.

	Quote: Originally Posted by Jim Drew
	We know that we had more of our systems in use than FASST systems for the world record. The event organizer has all of the numbers.

	Quote: Originally Posted by IPFlyer
	1 XPS 1 Futaba 50 JR/Spectrum

That qualifies as "0wned".

Also...



(from http://translate.google.com/translat...F8&sl=de&tl=en )

[Simpleton]

	Quote: Originally Posted by Edge 540
	Yeah, like I pointed out several pages ago. There are about a half dozen fg members who spontaneously show up, post ONLY on 2.4 related discussion supporting or defending XPS and never venture anywhere else. It's a shame really. FG is such a great site with so many other topics/ videos/ pics etc etc etc. Do they really think it isn't obvious what they're doing?

To be fair, there are a few FG members who post in nothing but XPS threads that are not XPS supporters/defenders.

[Woketman]

	Quote: Originally Posted by Simpleton
	To be fair, there are a few FG members who post in nothing but XPS threads that are not XPS supporters/defenders.

That's me!!!!
That's me!!!!
That's me!!!!

[Edge 540]

Maybe we should have 2.4Giants. That way everyone can disgard the whole "hobby" part of the deal and get right to the good stuff. haha

[Chris F]

	Quote: Originally Posted by Edge 540
	Maybe we should have 2.4Giants. That way everyone can disgard the whole "hobby" part of the deal and get right to the good stuff. haha

These threads by XJet and Kiwi have bought many new members to this site that otherwise wouldn't be here. FG is a safe and fairly moderated site for discussion about XPS. I am sure some of us (obviously I am one of the new members you refer to) have had a look around and some of us have probably posted in other foums here. I have had a look around and it’s a great site, but like some others I am here soley because the XPS threads here are the most informative I have found anywhere. When you say

	Quote: Originally Posted by Edge 540
	Yeah, like I pointed out several pages ago. There are about a half dozen fg members who spontaneously show up, post ONLY on 2.4 related discussion supporting or defending XPS and never venture anywhere else. It's a shame really. FG is such a great site with so many other topics/ videos/ pics etc etc etc. Do they really think it isn't obvious what they're doing?

What do you mean? Is there something wrong with what we are doing? I understand that you would like us to participate in other forums here but should it upset you enough to make a point of it if we don’t?

[Black Sheep]

I must be one of them too
I've been around on here since day 'DOT'! when it was first on line after the debarcle on the Cirkus. I just don't have many posts under my name now since I changed my name a couple of years ago.

[bodywerks]

	Quote:
	Scubacb? I wonder. Could he and all the rest really be JD under different member names? I am beginning to have my suspicions.

I can attest that he is NOT Jim Drew. he flies at my local field and looks nothing like JD.

[Dustflyer]

	Quote: Originally Posted by bodywerks
	I can attest that he is NOT Jim Drew. he flies at my local field and looks nothing like JD.

That sounds completely unproven, false, and made up to me.

He calls himself Scubacb, but that doesn't really prove he is who he says he is. he could be anybody. Lots of people say they are somebody they aren't, what makes him any more honest than anyone else? Just because he doesn't look like JD doesn't necessarily mean he isn't JD. Looks don't prove anything. Photos don't prove anything either for that matter. Where's the legitimate test that the mere fact that he doesn't look like JD has anything to do with whether he really is JD or not. Where's the proof that the JD you think is JD really is JD and not Scubacb? I want to see driver's licenses and photos and even then I would have to submit those to independent reviews to insure they weren't forged and then I would have to independently examine the reviewers to make sure they weren't biased and really working for Futaba. Once we get that basic groundwork out of the way, maybe then we can start looking for some legitimate, worthwhile evidence to figure out who he really is!

[XJet]

Oh dear, it looks as if XPS users are now shooting each other down or (as I'm sure the FB's will claim) had an astonishingly bad bit of luck when both their switches failed simultaneously.

RC Groups: "XPS" issues

[JEFFRO503]

XJET....could this incident that just happened to that guy over on RCG , be caused by one of those Feq Blocker guns , or whatever they are called? Don't get me wrong , i wouldn't use XPS in anything above a foamy , but it almost sound like they got blasted with something. Could it be possible that the two guys who lost their airplanes had the same GUID number as well? or is that even possible?

[XJet]

It's pretty unlikely (but not impossible) that this was caused by a deliberate burst of interference. However, for someone to generate this amount of power on multiple parts of the band using a hand-held device operated from a "safe distance" would be pretty unlikely.

As for the GUID, I can pretty much guarantee that the standard XBeePro modules leave the factory with unique GUIDs *but* JD did claim that he'd purchased his own set of addresses for use with XPS. Knowing JD's propensity to "assume" and not check for such things, it is always possible that (if his claims in respect to the IDs is true) that he's goofed and there are some XPS systems with the same GUID out there.

[sweetpea]

Only problem with that is they were both flying and lost control. That begs that at some point in the flight they both had control and then lost it so a non unique Guid seems unlikely.

I'd lean more toward some type of outside interference. Of course it could be 100's of things but for 2 at the same time interference of some type keys in

[BaldEagel]

For those guys who post on here infrequently, which I am one, the problem that seems to be happening is that some people are on here defending XPS in a manic sort of way without any proactive suggestions on how we can prove or dissprove JD's claims, you know who you are, so if you are not one of these don't get upset when someone suggests that some posters have a hidden agenda.

And to you others that support JD and his claims for the XPS system please let us know how we need to specifically test the system to make it hop, if we can then test and prove that, the thread will have no further purpose and will be closed down, if not the thread will continue.

Mike