Independent tests prove lack of frequency hopping with XPS

[ricoalonso]

Kiwi,
If XJet is no longer coming back to this thread and if you (or FG) are planning to continue the test for most spectrum systems, maybe someone can close this one and start a new one with a new title. Pls keep us posted.

Thanks,
^R^

[zoomer260]

	Quote: Originally Posted by LangerLad
	Unsubstantiated? So Jim Drew himself admitting that there is a problem is just a rumor then? All that XJet has done is bring it to our attention and was going to carry out some independent testing on the issue and share his finding with us. If some believe in the Xtreme sales hype then why do they choose to ignore the self same company's admission to some problems?

I agree, this is exactly what happened. I looked at the first few posts. Again. The bashers aren't listening to all the information Xjet posted.

[sweetpea]

I'm one of Xjet's biggest skeptics......but I believed that he caused the system to fail. But not why it failed. And if the other systems wouldn't have failed under the same situation.

It was no surprise to me when XPS came out and said it wouldn't hop as to me this makes sense for the particular situation (not saying that is right or wrong or that it should have been more clear to the consumer)

What I am saying is I want the data. I want to see the variables held constant and those not. I want to see how many times it was done. The exact measurements that were taken. The exact powe rlevels we are seeing. Etc Etc Etc.... I want to see the dry runs (i.e. no interference).

And I want to take that to all the other popular systems (for now that is Spektrum/JR and Fasst).

I want to know if these systems fail in the same test the same way. If they do, then guess what.......2.4 cameras need to be banned from every AMA field that flys 2.4 and some kind of warning needs to be added to all the packages of 2.4 for the consumer

I stopped caring whether XPS hops or not long ago........its about a particular situation that may effect all 2.4 ----with intermittant hopping such as XPS, continous with FASST or picking two freqs such as Spektrum and without the data we cannot look at that!


Also the title here is misleading......what was found is one instance of XPS not hopping. It has yet to be proven that it hops at slow noise rise or doesn't hop. Another test that could be performed with most of variables from the intial test if we had the data........

Now, FG or whoever is going to test has to start from square one.


Why.....because Xjet couldn't handle some critics?

I emplore you Xjet to take your 2 weeks and present the data. I for one thank you for doing the testing.....now lets take it a step further and find out more information

[USN_POPS]

It would seem to me that with the advent of the XDP and it's ability to analyze the Spectrum, someone would be able to take a laptop to the field and monitor the 2.4 band over a period of time, and with various systems in use. I have mine on order, and expect to do just that. We have a number of guys going over to 2.4, and I hope to be able to see the systems work in real time.

[ricoalonso]

That'll be great.

One question I have is: what if the interference was sensed at the Rx side, that being far above ground and able to see (LOS) more noise than the XPD/Spectrum Analyzer which is almost at the ground level? Is the Rx capable of storing some stats and be able to download it to the XPD for analysis? Just a thought.

Thanks,
^R^

[thinkitsntillegal]

	Quote: Originally Posted by sweetpea
	What I am saying is I want the data. I want to see the variables held constant and those not. I want to see how many times it was done. The exact measurements that were taken. The exact powe rlevels we are seeing. Etc Etc Etc.... I want to see the dry runs (i.e. no interference). And I want to take that to all the other popular systems (for now that is Spektrum/JR and Fasst). I want to know if these systems fail in the same test the same way. If they do, then guess what.......2.4 cameras need to be banned from every AMA field that flys 2.4 and some kind of warning needs to be added to all the packages of 2.4 for the consumer

Well sweetpea, since you want so many answers, you better get to work . Lots of questions you have to start answering.
Sorry to see you go XJet. I, like many others, were patiently waiting for your results. Sorry a few couldn't keep their pants on and wait for you to do this in you SPARE time.

[Kiwi]

Sweetpea,

Seeing as your a close friend of Mr Drews maybe you could ask him to post irefutable evidence on any web site he wishes to, as he obviously gave up coming here after spamming the site for six months for the free advertising, showing his XPS system hopping frequencies when noise levels rise in increments that he says cause the switch.

I´m sure its a whole lot easier for him to do that and show his customer base that the product he sells is what he says it is. I mean Spektrum and FASST are posting data scans showing where and how their system works.

Sure we (FG) are going do it but like Xjet it will take time as its spare time, its not our job, its not our business, but it is his so why on earth would he not put the critics to bed really fast by posting data that shows his system hopping frequencies in a noisy environment.

I know if it was my product I would be out protecting my products reutation in a flash. You would not be able to hold me back. So just maybe the guy to answer the question is Mr Drew, then we can confirm it with our external and independent testing here on FG.

Sounds fair to me I think!!!!!

[Mithrandir]

I believe Mr. Drew confines his posting to http://www.rcgroups.com/xtreme-power-systems-483/

[sweetpea]

	Quote: Originally Posted by thinkitsntillegal
	Well sweetpea, since you want so many answers, you better get to work . Lots of questions you have to start answering. Sorry to see you go XJet. I, like many others, were patiently waiting for your results. Sorry a few couldn't keep their pants on and wait for you to do this in you SPARE time.

Well I can't do any testing till I see Xjet's method and data. To hold things constant I need that. Otherwise I have to start over....This wasn't my thread that I started. And I have tested my JR PCM, XPS and Spektrum module quite extensively.....just not with a 2.4 camera yet.

	Quote: Originally Posted by Kiwi
	Sweetpea, Seeing as your a close friend of Mr Drews maybe you could ask him to post irefutable evidence on any web site he wishes to, as he obviously gave up coming here after spamming the site for six months for the free advertising, showing his XPS system hopping frequencies when noise levels rise in increments that he says cause the switch. I´m sure its a whole lot easier for him to do that and show his customer base that the product he sells is what he says it is. I mean Spektrum and FASST are posting data scans showing where and how their system works. Sure we (FG) are going do it but like Xjet it will take time as its spare time, its not our job, its not our business, but it is his so why on earth would he not put the critics to bed really fast by posting data that shows his system hopping frequencies in a noisy environment. I know if it was my product I would be out protecting my products reutation in a flash. You would not be able to hold me back. So just maybe the guy to answer the question is Mr Drew, then we can confirm it with our external and independent testing here on FG. Sounds fair to me I think!!!!!

1) I'm not great friends with Jim. I am an acquaintance though. I've only met him once. And we really have not talked or emailed much since I met him. So I don't think he will listen to me anymore than any of you. Of course if XPS takes the time to explain every tiny thing on their system then they would fall even farther behind on 6ch rx's, endpins, XDP and telemetry with satellites (again satellites have been an option since the system first came out with telemetry, not just recently like many people claim. ). Then everyone would be mad at me for convincing them to do that instead of produce more products since it appears more people are successful than not. Or don't care that it doesn't hop in sudden noise levels

2) I can't speak for how XPS advertises.....I'm not part of any of that. And I've stated from the get-go.....I wish XPS would have chose FG to have their forum

3) Yes, I would think that any company would want to prove their system to the customer....but what is it to prove currently? They told all of us that it won't hop in one situation and they are trying to fix that because the customer doesn't want the feature (waiting for the high noise level to subside) since in this case it won't hop but tries to wait out the noise. Granted this was not explained to the consumer.

Next you want XPS to respond to independant tests that they themselves don't have access to the data on. How can they do anything....verify or de-verify when they are in the same position as us the customer and don't know the specifics of the test? All they did was confirm a setting in their programming...they didn't confirm Xjets test. (smart move on any companies part)

Xjet's thread was labled as if XPS never hops....but he only suggested it didn't in one instance that might not matter if it hops or not (again all the 2.4 systems might fail in this "test"). Until we have the data and exact techniques we will not know and we cannot recreate what he has already done and take it a step further.

Like I said......I'm glad he did his test.....just not happy he has decided to not show his results. I'm happy to wait until he has the personal time to show us. We all have real lives outside this hobby to deal with....I was never mad about his 2 week delay.

And I look forward to FG testing......and if I can help let me know.

[wrightme]

	Quote: Originally Posted by XJet
	Several independent tests (by different parties) has proven that the XPS system does *not* reliably frequency hop (in fact no frequency hopping has ever been recorded by independent testers).

This statement alone was the beginning of this thread. Then it went into a discussion of how XPS did not do enough to allay the concerns. Unfortunately, XJET chose to NOT provide the data from the "independent tests." He loses credibility as a result.

Had he started the thread with a "testing to follow..." the lack of data up front would not have been harped upon as much. While I use and like the XPS system, I would like to see the actual data from these "independent tests" to better evaluate the future of the system.

[jack strickland]

	Quote: Originally Posted by Kiwi
	Sweetpea, Seeing as your a close friend of Mr Drews maybe you could ask him to post irefutable evidence on any web site he wishes to, as he obviously gave up coming here after spamming the site for six months for the free advertising, showing his XPS system hopping frequencies when noise levels rise in increments that he says cause the switch. I´m sure its a whole lot easier for him to do that and show his customer base that the product he sells is what he says it is. I mean Spektrum and FASST are posting data scans showing where and how their system works. Sure we (FG) are going do it but like Xjet it will take time as its spare time, its not our job, its not our business, but it is his so why on earth would he not put the critics to bed really fast by posting data that shows his system hopping frequencies in a noisy environment. I know if it was my product I would be out protecting my products reutation in a flash. You would not be able to hold me back. So just maybe the guy to answer the question is Mr Drew, then we can confirm it with our external and independent testing here on FG. Sounds fair to me I think!!!!!

Hi Allan Have been using Airtronics systems for 25 years, with zero problems. Now they have a new 2.4 system that looks very good and different from the others. I don't have one yet, however if it lives up to the claims, its gonna be a winner. If you like, ill post again about it, when I get one. This new system looks very promising. Global Hobbies will be distributing Cheers
Jack

[Flatlandman]

Absolutely post the info you get on it. The more info the better.