Independent tests prove lack of frequency hopping with XPS

[dick hanson]

	Quote: Originally Posted by Kiwi
	No but 72Mhz is not sold as a system that will beat interference by hopping to a new channel where as XPS is supposed to. Spektrum is supposed to lock onto two clean channels and stay there. FASST is supposed to use every nook and cranny in the available specktrum to keep you hooked up. 2.4 is absolutely marketed as the answer to all the interference problems. What we want to acertain now is: Does it work as advertised How does it handle a rotten environment At the end of the day who has the most robust system if there is one. Maybe they all have strong points and weak points, but lets wait and see. Apart from some of the IPD type receivers in 72Mhz, there is no real difference between brand A and brand Z. As a very talented man (responsable for the obtaining 72Mhz for RC use in fact) told me. FM, PCM, IPD, whatever, the only difference is the way you crash, but you do crash. But with 2.4 Ghz its a totally new ball game. No one manufacturers system is equal to the other and they all claim to be the best. Lets find out.

The thing is -we all tend to read into the advertising what WE think -
Does it work as advertised ?
(free from interferrence)
As far as I can tell - a true statement -but if you read in - "does it stop working when signal is blocked or power drops below working level - -then the inferrence changes ".
How does it handle a rotten enviroment?
Again subjective - If you mean sloppy rattling pipe connections -it is better - if you mean an all carbon airframe - not as well as a 36"long antenna outside the carbon-
All in all my own preference is overwhelmingly the 2.4 Spektrum and here is why :
first - It has Model Match available - a real ,usable safety feature
secondly -there has been a ongoing improvment in size/type rx available for everything from 4 ounce models to 50 pounders . (I have had almost zero problems with any of my setups ) -
The XPS and Futaba FASST I have seen and flown also work just as advertised
So which is best?
maybe what suits your own needs best might be closer to what we need to know.
Some guys will give reasons why they are waiting or will not switch -
Obviously - they have their own feelings as to why.
OK by me.

-

[Leseirf]

	Quote: Originally Posted by zoomer260
	I hate to be negative or the peanut gallery but if they (FCC) and govt. in general ever takes our toy planes as seriously as you suggest they will just BAN them. That's the way it works in this country. WE don't have and will never have the power to successfully lobby Washington.

I had that very same thought when reading Xjets post on the lethality of our toys. Bringing that concept to the forefront could have us all back to flying Pico-Cubs in the back yard!

[zoomer260]

On a positive note, I am extremely grateful to all taking this thread serious enough to actually check it out,(that have the resources) see where each available system has it's each individual weakness for guys like me with little budget to to make an informed decision. I have since added Spektrum to JR as a choice. I love the JR Tx box feel and ease of JR programming. Keep it up !!

[KrisW]

	Quote: Originally Posted by Leseirf
	I had that very same thought when reading Xjets post on the lethality of our toys. Bringing that concept to the forefront could have us all back to flying Pico-Cubs in the back yard!

The technology has been known for a very long time . .that no one has used it for nefarious means is a blessing in disguise. Our radios are so abundant, it would take a gestapo crackdown to confiscate them, and even then they could still come across the border illegally from any number of countries. And, come to think of it. . 2.4 would probably be the first choice for most. . . . . . .of THEM.

It's NOT gonna happen, sorry.

[Kiwi]

One of the darker sides of 2.4Ghz is who else use it and who else does not like it.

God help it never happens and I actually have had this stuffed away and really felt I should never post this, but I see this as a mature discussion now and a lot of the opinions are giving way to one of the better threads we have running on the site.

Anyway imagine if litlle Johnny turns up close to the field with this puppy in his Tit pocket.

[DesertHucker]

	Quote: Originally Posted by Kiwi
	One of the darker sides of 2.4Ghz is who else use it and who else does not like it. God help it never happens and I actually have had this stuffed away and really felt I should never post this, but I see this as a mature discussion now and a lot of the opinions are giving way to one of the better threads we have running on the site. Anyway imagine if litlle Johnny turns up close to the field with this puppy in his Tit pocket.

Well KIWI what is it?

2.4g jammer!

[Kiwi]

That thing will blow every 2.4 Ghz device off the map within 150 feet of it being activated. Problem is the ar$ehole who advertises these things offers to make em stronger if you need MORE POWER!!!!!!!

I suppose I'm a bit paranoid when it comes to what can be done with 2.4. With 72Mhz you never ever seen a device like this advertised on Ebay. But with 2.4 you do.

That particular one does 800, 900 and 2.3 Ghz. But you get them in what ever flavor you want mail order.

[erichevy]

What is the apparatus Kiwi? What does it do, and where is it for?
Be more specific please!

Eric.

[xed]

	Quote: Originally Posted by Kiwi
	I suppose I'm a bit paranoid when it comes to what can be done with 2.4. With 72Mhz you never ever seen a device like this advertised on Ebay. But with 2.4 you do.

Well in theory, if you a real *!(@$(^, you can buy a $50.00 Hobbico frequency scanner with an external antenna from pretty much any hobby store and sit behind a bush with a 72MHz synthesizer capable transmitter and pick off planes and helis at will...

[Andy Thomas]

How can that f..king be legal??

[buttface]

	Quote: Originally Posted by xed
	Well in theory, if you a real *!(@$(^, you can buy a $50.00 Hobbico frequency scanner with an external antenna from pretty much any hobby store and sit behind a bush with a 72MHz synthesizer capable transmitter and pick off planes and helis at will...

They would have to be a jealous sick minded individual with too much time to do that! lol
Or just someone that built a new home next to the 25year old club field that cant stand to hear r/c planes. We have suspected this of happening at our field.She is a house wife that is a little cookie.She alway complains we are flying over her house several times a week.Cops would show up and tell us not to.One day I had a cop follow me in and hide where she couldn't see him.I fired up my plane and guess what.He drove over to me an said he got another complaint that I was flying over her house.I was the only one there and I hadn't even flown yet.
After that day the cops would write her off as a false complainer and ignore her calls.It was great! Finally we had Peace ! Until planes began to mysteriously fall from the sky at the next funfly on 72mhz. .One by one 5 of them where hit that day.After that day many other planes where killed.I lost a plane every time I came out along with several other guys.
Every one is on 2.4 now.I hope see doesn't shop on E-Bay!!!

[klhoard]

.
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Is that a cell phone jammer?
.
.

[sherman89]

I do not know about the frequency hopping but I do know I lost a 33% Extra with A Da-85 to Rx lockout, I have flown the XPS since May of 06 without any problems until last Thursday. The Rx went into lock out, I watched the plane go through 4 slow circles over the field before it finally met mother earth and totally destructed into a peanut field. I had enough time to call my broker and sell my shares in the airplane company before the plane crashed. What a sick feeling, now here is the rub, everything checked out after the crash, both airborne pacs and switches and servos all worked fine, go fiqure, the transmiter was checked at the time and was showing 10.0volts. No more XPS, I can not afford it!

[jonkoppisch]

Works till it doesn't... Been there, done that.... Sorry to hear about the xtra!

[Kiwi]

Guys thats a simple jammer for cell phones and if you look at the feedback these turds get then they sell plenty of them. Now if your a do it yourself kinda guy go do a google search on 2.4Ghz jammer.

You can buy the plans for $9.95 and build it for 10 bucks using parts from the local electronics hobby supply shop. Now I know thats dooms day bull$hido and the sky is falling stuff. But you cant kill 72 Mhz that easy. It takes brains and money to do it like was mentioned before.

Guys I'm not trying to put the voodoo on 2.4. Its going to be the way things go for sure. Its going to take time, its going to take effort (no such thing as a free lunch remember) and there's going to be normal hard school of knocks getting it right.

There's always a price to pay for success and thats been proven so many times that its indelible in our society.

Anyway lets get on with the testing.