Independent tests prove lack of frequency hopping with XPS

[Kiwi]

	Quote: Originally Posted by Dustflyer
	Kiwi you've done great work. Thank you. I figured there was something screwy with XPS from the day I got it. I was one of the first people to buy it. I hooked it up on my kitchen counter with one servo and a freshly charged pack and it started pulsing the servo. I put it in my 33% H9 Cap and things got weirder, like pulsing rudder, uncommanded control inputs and no response at all even with green lights on transmitter module and receiver. Jim Drew and the other XPS forum people told me my 9Z was the problem. I figured that was nonsense which proved to be true. I put a Spektrum module in my 9Z and it has worked perfectly with Spektrum ever since. Here are some short, entertaining videos of that bizarre XPS behavior:

Haaaaaa Dustflyer, To quote JD those are not real world tests mate. No one flies in a simulated environment. Bench testing has nothing on doing it down at the club mate.

Seriously your lucky and or scrupulous in your setup to find that as a lot of people really only wave the sticks around to make sure things move but they dont always hold them away from the servo center point for any length of time. How often have you seen some one take off with a new plane and have the flying surfaces reversed. Its because they only waggle them, they do not make a positive ID of how far, how fast etc.

There's no doubt that XPS is a second tier system and not for every application. In fact if it functions like that I dont know what application it would fit.

[Dustflyer]

I'm still grinnin' guys! Nice to see some humor in this XPS stuff for a change!

[jonkoppisch]

Shame on you Dusty! You couldn't get it to work on the bench so you didn't just go ahead and fly it!!!! Especially since those tests don't count

I sure wish that it would have done that for me!

[Dustflyer]

Let's see: paint balls, Amigas, 2.4ghz systems, where will Jim Drew show up next? Hmm. I can see it now...

"Ladies and gentlemen, welcome to the first computer controlled, pilotless airliner. We hope you enjoy your flight and the cheap fares made possible by eliminating pilots and crew. We understand you may be a bit concerned but there is absolutely nothing to be worried about... nothing to be worried about... nothing to be worried about......."

[1bwana1]

No, not the Airline business, too much regulation and testing required. However, in light of the current world oil crisis, I can see a device that takes any fuel injected car, and doubles or triples it's fuel mileage. All you'll have to do is plug it into your cigarette lighter.....

[XJet]

	Quote: Originally Posted by Kiwi
	Haaaaaa Dustflyer, To quote JD those are not real world tests mate. No one flies in a simulated environment. Bench testing has nothing on doing it down at the club mate.

No wonder I keep getting glitches when I do low passes over my bench!

[Fish07]

	Quote: Originally Posted by 1bwana1
	No, not the Airline business, too much regulation and testing required. However, in light of the current world oil crisis, I can see a device that takes any fuel injected car, and doubles or triples it's fuel mileage. All you'll have to do is plug it into your cigarette lighter.....

LOL

[Toumal]

	Quote: Originally Posted by Dustflyer
	Here are some short, entertaining videos of that bizarre XPS behavior:

Dustflyer, I noticed you had the XPS antenna on the TX unplugged - or am I mistaken there?

	Quote: Originally Posted by Kiwi
	Haaaaaa Dustflyer, To quote JD those are not real world tests mate. No one flies in a simulated environment. Bench testing has nothing on doing it down at the club mate.

Righty-o. Because all those problems will magically go away when the plane is in the air.

	Quote: Originally Posted by Kiwi
	There's no doubt that XPS is a second tier system and not for every application. In fact if it functions like that I dont know what application it would fit.

Cars! Hmm.. no, still a bit dangerous.
Boats! But there could be other people in the water. Nah.
I would say remote controlled pet door, but you still run the risk of injuring your pet - or having it locked out of the house due to interference.

You could use it as an expensive wlan detector though - if the servo stops waggling, you've potentially found free internet access!

[Fish07]

	Quote: Originally Posted by Toumal
	Dustflyer, I noticed you had the XPS antenna on the TX unplugged - or am I mistaken there? Righty-o. Because all those problems will magically go away when the plane is in the air. Cars! Hmm.. no, still a bit dangerous. Boats! But there could be other people in the water. Nah. I would say remote controlled pet door, but you still run the risk of injuring your pet - or having it locked out of the house due to interference. You could use it as an expensive wlan detector though - if the servo stops waggling, you've potentially found free internet access!

Here comes the fan boys !!!!!:Banane20:

[Dustflyer]

	Quote: Originally Posted by Toumal
	Dustflyer, I noticed you had the XPS antenna on the TX unplugged - or am I mistaken there?

You observe rightly. The antenna is unplugged.

In the original version 1.4 manual the first step of the range testing procedure was to remove the antenna. It then goes on to say that with the prog button pushed you should have perfect control at 100 feet.

Without the prog button pushed I couldn't get perfect control at two feet.

[BZFrank]

Another case of persistent lockout. I am sure the pilot was hopping mad: http://translate.google.de/translate...hl=de&ie=UTF-8

[Cherokee Jim]

Hello All,

"Without the prog button pushed I couldn't get perfect control at two feet. I have been doing some outdoor test and I have the following results so far:"

XPS

No Antenna and Button pushed = 51 Ft.
No Antenna and Button not pushed = 348 Ft.

Next week I will repeat the test again using the XPS and a Spektrum DX7.

XPS

No Antenna button pushed
No Antenna Button Not Pushed
Antenna and Button Pushed
Antenna and Button Not Pushed

DX7

Antenna on and Button Pushed
Antenna on and Button Not Pushed
Antenna on and Satellite RX removed and Button Pushed
Antenna on and Satellite RX removed, Button Not Pushed


I move the RX orientation while doing a range check
I remove the DX7 Satellite RX to see what effect it will have and to see what would happen if it stops working. I did some range checking with the DX7 today and removing its satellite RX does decrease range and it increases the receiver's sensitivity to antenna orientation.

I also checked at what height above the ground the signal is lost and at what distance. Next week I will do both systems, today I just wanted to get a first look and to see what a meaningful test would be.

I also Toggle power off and on to see at what distances I can reacquire signal lock.

Happy Flying,
Cherokee Jim Mahoney

[Kiwi]

	Quote: Originally Posted by BZFrank
	Another case of persistent lockout. I am sure the pilot was hopping mad: http://translate.google.de/translate...hl=de&ie=UTF-8

Hell that would be a nervous few minutes wondering where in the heck it would decide to take a dirt nap. I bet there was no free space under the tents or tables until it went away.

[XJet]

Well it seems that the truth hurts and JD has threatened me with being banned if I dare to post to the XPS group at RCG again.

Of course that's his privilege, given that this is a support group that he (supposedly) pays for.

However, it does indicate that the strain of having his claims for XPS debunked is beginning to show.

I have offered to help him with the task of repositioning XPS in the market and restating its capabilities, so as to better reflect reality, and I'm genuine in that offer. Somehow I doubt he'll be taking me up on it -- but I'd love to be pleasantly surprised. Who knows.

[madmax]

Hello everyone!! I know there are alot of FG newcomers here, and I just wanted to say hi!! Welcome to FG, and enjoy your stay!! Be sure to hop around the site, we do a whole bunch more. Thanks again and best ---- MD