Independent tests prove lack of frequency hopping with XPS

[jonkoppisch]

More on the frog.

To make it up to the frog I bought him a cigar and brought in a couple of female frogs for the afternoon and played a video of the muppets for them to watch After that, i put him out on the back porch and the last i saw of him he was heading off in the Orlando Florida direction leaving a smoke trail

If you would like to join the list of frog sympathizers you can go to http://www.rcgroups.com/forums/showt...0#post10329392 and post your outcry for the mistreatment of the poor froggy

disclaimer: No frogs were hurt or poked in the making of this video

[Dustflyer]

	Quote: Originally Posted by Wojcigitty
	I think you deserve an award for the best "stupid XPS hopping" video.

He deserves a reward for keeping a sense of humor in spite of losing a jet because of a radio system that failed to perform as advertised. XPS has proven itself to be grossly inadequate as a remote control system.

Want to talk about stupid? I saw an incredibly idiotic comment on another forum about how XPS is a fixed channel system just like Spektrum, as if that made it just as good as Spektrum. That is precisely the problem with it and why Spektrum uses two channels and two receivers, because that works and what XPS does doesn't.

I use Spektrum because it works best. It is the only system designed from scratch specifically for RC. I've talked to people at Spektrum familiar with the design phase. They looked at frequency hopping schemes and rejected the idea. They found the dual channel dual receiver system just works better. I have also talked with high level jet flyers and turbine people involved in early flight testing and evaluation; same conclusion, Spektrum works better than any other scheme.

XPS, in spite of what they advertise or claim, apparently operates on a single frequency with a single antenna. Ever notice that all wireless microphone and guitar systems are dual channel, dual antenna true diversity systems? Even that stuff uses two channels, not single channel or frequency hopping.

WARNING:

If you fly an RC airplane with XPS there is a very high probability it will crash due to the inadequacies of the radio control system.

[Wojcigitty]

Dustflyer,

Chill out dude. I meant that it was the funniest of the stupid XPS hopping videos. Better than this one:

YouTube - XPS Hop Video

I didn't mean that his attitude was stupid or that mocking XPS is stupid. He's got every right to be mad, I've been burned by bad products in the past too.

[jonkoppisch]

I got what you meant Woj!!!! Dusty is wound up as they almost got him too!!!!

[Foamaholic]

Aw, you don't like my video?

[XJet]

I just got banned from RCG because I was rude enough to point out that someone with a 900MHz FPV system discovered they'd get more range by turning on the video transmitter before turning on XPS.

I simply pointed out that if XPS was frequency agile as JD claimed then surely it would hop to the clear part of the band even if it was turned on *after* the video transmitter.

In effect, they were getting twice the range with the video powered up first (XPS second) so JD's claims that the hopping is there to extend the range seems to fail in this scenario. If XPS hopped as a method of extending range then surely, when the XPS was powered up first and the video second, it would eventually hop to a clearer part of the band as the signal strength got lower (noise floor rose).

It seems that pointing out the facts is now verboten at RCG.

I doubt I'll even bother going back to RCG, their moderation system appears to allow a few rogue individuals with agendas to ride roughshod over those who they don't agree with, even when you don't break the rules and simply challenge the claims of a manufacturer.

Money talks I guess.

[jonkoppisch]

I'm sure that it will be all smooth sailing over at rcg now that the 'rouge' element has been removed

Time to make another hopping video... Now where did I put that sledge hammer again????

[Wojcigitty]

	Quote: Originally Posted by Foamaholic
	Aw, you don't like my video?

It was pretty good, but dude, jonkoppish had a frog in his. It's tough to compete with that.

[jonkoppisch]

That wasn't a frog... That was a patented intelligent frequency hopping system

Just wait until you see my spherical antenna...

[tadawson]

	Quote: Originally Posted by Dustflyer
	Ever notice that all wireless microphone and guitar systems are dual channel, dual antenna true diversity systems? Even that stuff uses two channels, not single channel or frequency hopping.

I work in pro audio, and hate to burst your bubble, but the dominant pro wireless systems currently out there are in the 700 to 900 MHz range, single LOCKED frequency, with no hopping. They are single antenna on the TX and dual on the RX, for diversity, as well as the ability to handle variable polarization . . . . and most are simply switched diversity, which is not "true diversity" as you state, where both antenna inputs are constantly in use . . .

- Tim

[Dustflyer]

	Quote: Originally Posted by Wojcigitty
	Dustflyer, Chill out dude. I meant that it was the funniest of the stupid XPS hopping videos. Better than this one: YouTube - XPS Hop Video I didn't mean that his attitude was stupid or that mocking XPS is stupid. He's got every right to be mad, I've been burned by bad products in the past too.

My apologies, I took that the wrong way. I'm totally chilled. Thought the video was absolutely hilarious. The perfect video at the perfect time. I guess you and I agree!

[Dustflyer]

	Quote: Originally Posted by tadawson
	I work in pro audio, and hate to burst your bubble, but the dominant pro wireless systems currently out there are in the 700 to 900 MHz range, single LOCKED frequency, with no hopping. They are single antenna on the TX and dual on the RX, for diversity, as well as the ability to handle variable polarization . . . . and most are simply switched diversity, which is not "true diversity" as you state, where both antenna inputs are constantly in use . . . - Tim

Well that shows how little I know about that stuff. I just have a pile of guitars and amps and an old Nady wireless for my guitar with two antennas that has worked perfectly for years, something I can't say about XPS!