Kiwi's XPS test results are up.

[Woketman]

Avoid XPS and your airframes will, on average, live longer. That fact is indisputable among those that have paid attention.

[3ddd]

been flying xps for over four years and not a problem, two 35% gassers and still in the original 30%er maybe you are like so many other and just don.t know how to install it and make it work,,for those cox swana makes good flybees

[JimDrew]

	Quote: Originally Posted by Julez
	I did, and the support agent denied multiple times that any patents concerning the antenna of the Xbee(pro) module existed. Instead, they told me that it was a standard groundplane monopole.

I don't know who you chatted with, but there is information on their website about this technology.

Our module hardware is the XBEE hardware, but the firmware is radically different, although it was created by Digi for us.

[JimDrew]

	Quote: Originally Posted by Woketman
	Avoid XPS and your airframes will, on average, live longer. That fact is indisputable among those that have paid attention.

Every single quarter since the release of the XtremeLink system (3+ years ago), our profits have increased. With well over 100,000 systems in use world-wide, it is clear that the system works and we are not going anywhere. With our new hardware (smallest and lightest 2.4GHz receiver in the world), we will be getting into new markets.

[Woketman]

	Quote: Originally Posted by 3ddd
	been flying xps for over four years and not a problem, two 35% gassers and still in the original 30%er maybe you are like so many other and just don.t know how to install it and make it work,,for those cox swana makes good flybees

I never had an issue. Worked perfectly for me every time I flew it. But one of the advantages that we homosapiens have is that we have the ability to learn from others' mistakes. I know several turbine guys that had serious issues with XPS. They are NOT dummies and I respect them greatly. They have been around a long time and are very knowledgable. Their airframes make your 35% gassers look like the Cox toys of which you speak. They had more than adequate power supplies. Therefore JD's normal "power" reason for blaming the consumer was not applicable.

No, XPS (especially first gen) is not reliable enough for anything more than a foamy. The new stuff sounds better, but do you really wanna trust the guy that lied to you???? Well, maybe in a 35% gasser, but not in something valuable! ;-))

[Julez]

	Quote: Originally Posted by JimDrew
	I don't know who you chatted with, but there is information on their website about this technology.

Where? Could you provide a link?
I searched and found zero...
http://www.digi.com/search/?simplequerystring=spherical

	Quote:
	Our module hardware is the XBEE hardware, but the firmware is radically different, although it was created by Digi for us.

Do you mean that the hardware of the Xbee modules you get is in no way different from the hardware of any other Xbee module?

[cptsnoopy]

	Quote: Originally Posted by JimDrew
	With our new hardware (smallest and lightest 2.4GHz receiver in the world), we will be getting into new markets.

My brother and I are keeping an open mind and if these appear to work for what we require, we will certainly entertain the idea.

Btw, one of the servos we thought was an issue turned out to be a bad esc/bec combo that was putting some serious noise on the system. Replacing the servo was not the answer, replacing the esc was. I know, first time anyone has heard of that...

Charlie

[Charley38]

	Quote: Originally Posted by dick hanson
	I think Jules may be part CZECH--- " If I can not find it in print- It does not exist". My good friend Ed Skorepa lives by this code

Hi Dick,

Tell Ed that anyone can print anything but the fact that it's printed doesn't make it true.

CR

[Woketman]

	Quote: Originally Posted by Charley38
	Hi Dick, Tell Ed that anyone can print anything but the fact that it's printed doesn't make it true. CR

I got another axiom for you that is usually 99% accurate: "If JD says it, it is BS!"

[JimDrew]

Julez, "spherical" is our term. Digi calls it omni-directional, or as their lead engineer put it "a ball with north and south dimples". Digi's antenna patents pertain to their sensitivity and selectivity using their antenna.

[Julez]

Of course they are omni-directional in one plane.

But have a look:
http://ftp1.digi.com/support/documen...90000976_D.pdf

There are "omni-directonal" antennas listed with up to 15db. This clearly means, that they cannot be omni-directional in all 3 dimensions, and Digi has another understanding of the term "omni-directional" than what you want us to believe that their antennas are.
Remember, Xbee modules were designed for industrial applications, where the 3rd dimension is hardly needed. There is no point in sending data to the factory floor or ceiling. So the radiation patterns in the datasheets only represent the horizontal plane, not the vertical one.
Obviously, you do not know how to read such diagrams, and concluded that the radiation strenght is equal in all directions, and invented the term "spherical radiation".
There is no other explanation possible.

Thus, until a patent number concerning the antenna is presented, I do not believe a word.

[tadawson]

Note though, that on page 139 of the document that you reference, the on-board monopole ("wire") antenna is shown to have a gain of only 1.5dBi which would indicate that it's deviation from a true sphere will be very minimal . . . as Jim said "dimples on the top and bottom" . . . pretty well sums it up . . .

- Tim