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| 2.4 Ghz Spread Spectrum Technology Discuss Spektrum, Futaba FASST, and all of the exciting 2.4 transmitter/receiver technology here! |
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| | #302 (permalink) | ||||||||||||||||||
| If you can't HUCK it BLING IT! ![]() Join Date: Jan 2006 Location: Whidbey Island, WA Age: 34
Posts: 7,323
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But with Spektrum you can run a RX 36in from the main in 2 directions. That is a big deal when you think that a 40% airplane is 115in or so. gives you basically the whole plane coverage. Of course add in dual RX's in either plane and you increase it even more for both systems to cover the entire plane. Right now though Spektrum has slightly better coverage options but I don't think FASST is as bad if you run 2 RX's. I do wish XPS would go dual RX or introduce the Satellites already.
__________________ Offical Member of Team Caribou Lou A 'Veteran' -- whether active duty, discharged,retired, or reserve --is someone who, at one point in his life, wrote a blank check made payable to 'The United States of America,' for an amount of 'up to, and including his life.' That is honor, and there are way too many people in this country today, who no longer understand that fact | ||||||||||||||||||
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| | #303 (permalink) | ||||||||||||||||||
| I don't do "custom" user title ![]() Join Date: Jan 2008
Posts: 102
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As in "pretend?" I am just kidding.Sorry, back to "serious." | ||||||||||||||||||
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| | #304 (permalink) |
| Do it inverted! ![]() Join Date: Jun 2006 Location: Phoenix, Arizona, USA Age: 49
Posts: 121
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This thread has been fascinating to read and there has been some very good information and experience learned. I wanted to reconfirm the antenna orientation issue with regards to the comment from Sweetpea (Sam). Spacial resolution with external antennas is important but antenna orientation is also extremely important. If your Tx antenna is oriented vertically, the best signal strength will be obtained with the Rx at that same orientation. Obviously, an aerobatic airplane can undergo many changes in orientation relative to the Tx and the best signal integrity will be obtained when you have three RX antennas in the X, Y and Z position. In my opinion (and we know how people like those), a minimum of three Rx's covering the three axis positions is a MINIMUM. Especially if only one channel is use for the link. JMHO
__________________ Kevin (aka. Spencer's pit bi.......BOSS, yeah, that's it!) |
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| | #305 (permalink) |
| If you can't HUCK it BLING IT! ![]() Join Date: Jan 2006 Location: Whidbey Island, WA Age: 34
Posts: 7,323
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Good point. I hadn't even touched on orientation of antennas
__________________ Offical Member of Team Caribou Lou A 'Veteran' -- whether active duty, discharged,retired, or reserve --is someone who, at one point in his life, wrote a blank check made payable to 'The United States of America,' for an amount of 'up to, and including his life.' That is honor, and there are way too many people in this country today, who no longer understand that fact |
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| | #306 (permalink) |
| Bad-ass Super Contributer! ![]() |
i for one am going to add the satellite antennas to my xps just because i want to.i have had not one problem all year but i don't want ether
__________________ Life's journey is not to arrive at the grave >safely and in a well preserved body,but rather to skid in > sideways,totally screwed up,worn out,shouting,"oh damn what a fine ride! AMA 98634 > LOOKS LIKE SINGLE LIFE IS A COMIN > Futaba, FROMECO:a good way to get a charge out of life My avitar says it all.DA all the WAY ![]() |
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| | #307 (permalink) | ||||||||||||||||||
| Bad-ass Super Contributer! ![]() Join Date: Feb 2006 Location: New Zealand Age: 55
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| | #308 (permalink) |
| If you can't HUCK it BLING IT! ![]() Join Date: Jan 2006 Location: Whidbey Island, WA Age: 34
Posts: 7,323
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Honestly what it comes down to is peace of mind. More antennas throughout your plane shouldn't hurt (as long as they are not on top of each other or touching). And for the small increase in price its no different than adding a 2nd battery to power your system.
__________________ Offical Member of Team Caribou Lou A 'Veteran' -- whether active duty, discharged,retired, or reserve --is someone who, at one point in his life, wrote a blank check made payable to 'The United States of America,' for an amount of 'up to, and including his life.' That is honor, and there are way too many people in this country today, who no longer understand that fact |
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| | #309 (permalink) |
| Do it inverted! ![]() Join Date: Jun 2006 Location: Phoenix, Arizona, USA Age: 49
Posts: 121
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I bought a 35% extra300 and it had an AR9000 Rx with one external Rx at 90 degree orientations. After each flight at our field, the data logger would record fades in the main and external RX of anywhere from the teens to mid twenties and, always, one frame loss. Well, me being the anal kind of guy that I am, I didn't even want that one frame loss. I bought another external and mounted it in the third axis and, now when we check with the logger, there are still the same amounts of fades on the main and both external RX's but the one frame loss is now gone. Is it that the 2nd external "gets more RF" or is it that the orientation of it "filled in" that one orientation that caused enough signal fade on the two original Rx's to rack-up a frame loss? Only very expensive equipment will be able tell but I have my conclusions.
__________________ Kevin (aka. Spencer's pit bi.......BOSS, yeah, that's it!) |
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| | #310 (permalink) | ||||||||||||||||||
| Bad-ass Super Contributer! ![]() Join Date: Jan 2006 Location: St Louis, MO Age: 39
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__________________ Tony Vitiello St Louis, MO | ||||||||||||||||||
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| | #311 (permalink) |
| Bad-ass Super Contributer! ![]() ![]() |
Righty ho folks. Just to let you know what where and how things are progressing with the 2.4 Ghz testing we are trying to get done. Two of our members have kindly loaned me an XPS system so we have the whole ball of string in place for that brand. Writeme and 1bwana1 I owe you guys a cool refreshment when we catch up some time. Many thanks for the support and trust you have in us. ASSAN have sent us their complete product line (albeit for Futaba as that is what I have) for testing and comparison. I have access to SPEKTRUM with a brand new in the box 7 channel unit available. FUTABA FASST knocked me off the back order list so we are beating the door down at Hobbico to try and jump the list to get a 14 channel setup on the way. However our biggest thanks goes to Metageek and Ryan Woodings who have sent a scanner so we can record all we do and post the files here on FG. All you will need to do is download the veiwer from their site and you have exactly what I get. I cant thank these guys enough for jumping in to help us here. Likely I will kick the results off in a new thread and Xjet your more than welcome to use the same one. As the old proverb says. Many hands make light work. Not sure if they referring to physical effort or power failures but it is a true statement. As for the testing I have a ton of ideas noted and the important thing is to keep them repeatable and exact. One of the great benefits of my location is the desert. I can drive 10 miles out of town and there is not even an ant. No bugs, nothing. I can drive for a year and never squish a bug on my windscreen. Its clinically clean, open spaces so the tests can be as real as possible in a real environment. No stray RF from local airports, military, nothing. This is my own area 51 for the top secret stuff. I will keep you posted once I get closer but in the time being hang in and lets see what we can get out of all these systems. Thanks again for the support guys. Seeing as I live south of the equator please give me a little time to get everything here in place and set up. Then its gonna be feet to the fire and get it done. |
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| | #312 (permalink) | ||||||||||||||||||
| Bad-ass Super Contributer! ![]() Join Date: Jan 2006 Location: NJ
Posts: 1,370
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__________________ Welcome to New Jersey...Where fun comes to die. | ||||||||||||||||||
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