Are you using Extremelink (XPS) and why
02-07-2008, 10:23 AM
#26
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RE: Are you using Extremelink (XPS) and why
ORIGINAL: BaldEagel
About face: I have all sorts of interferance problems with the system, slow responce, then no responce for a few seconds then it all comes back and starts again, this system seems to be as prone to interferance as PPM at my field, thats why no one uses PPM at my field, we are on marsh land which has telecommunications crossing it between Kent and Essex, the interferance always seems to be in the same place, and this is where I got the problem with the XPS, just managed to save the plane.
Mike
ORIGINAL: BaldEagel
I am using the Graupner IFS system wich is the XtremeLink system in al but name, the reason for going this route is convenience of the one only Rx and the small aerial, the Futaba aerial is just plain silly to get into a plane and not only that they have programming issues at the moment, on another thread they had four jets flying together on the XPS system so I don't think there is much wrong with it, you will always get the scare mongers gathering on anything new, we even had one silly old duffer who asked at a club meeting if we where going to allow 2.4Ghz to operate at our club field, he had not noticed I had been using a Spektrum for four months.
Mike
I am using the Graupner IFS system wich is the XtremeLink system in al but name, the reason for going this route is convenience of the one only Rx and the small aerial, the Futaba aerial is just plain silly to get into a plane and not only that they have programming issues at the moment, on another thread they had four jets flying together on the XPS system so I don't think there is much wrong with it, you will always get the scare mongers gathering on anything new, we even had one silly old duffer who asked at a club meeting if we where going to allow 2.4Ghz to operate at our club field, he had not noticed I had been using a Spektrum for four months.
Mike
About face: I have all sorts of interferance problems with the system, slow responce, then no responce for a few seconds then it all comes back and starts again, this system seems to be as prone to interferance as PPM at my field, thats why no one uses PPM at my field, we are on marsh land which has telecommunications crossing it between Kent and Essex, the interferance always seems to be in the same place, and this is where I got the problem with the XPS, just managed to save the plane.
Mike
02-07-2008, 11:16 AM
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RE: Are you using Extremelink (XPS) and why
ORIGINAL: jonkoppisch
You may want to check this thread just started. http://www.rcgroups.com/forums/showt...76#post9094981 The xps was tested with professional equipment for hopping if there was a sudden and/or a slow rise in interference... It failed!!!! The person testing lost his plane in the same manner as my jet...
You may want to check this thread just started. http://www.rcgroups.com/forums/showt...76#post9094981 The xps was tested with professional equipment for hopping if there was a sudden and/or a slow rise in interference... It failed!!!! The person testing lost his plane in the same manner as my jet...
-tychoc
02-07-2008, 03:31 PM
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RE: Are you using Extremelink (XPS) and why
ORIGINAL: Mac_Man_UK
-23 dBm ???
0dBm is 1mW, -23dBm equates to 5uW !!
-23 dBm ???
0dBm is 1mW, -23dBm equates to 5uW !!
I think the receiver is sensitive to about -90dbm so you have a considerable margin.
02-08-2008, 12:08 AM
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RE: Are you using Extremelink (XPS) and why
-23 is a signal strength reading from a receiver, not the TX, so that may well be accurate . . .
At any rate, that is how the display in the XDP appears to be calibrated . . a properly working TX will read at about -23 . . .
- Tim
At any rate, that is how the display in the XDP appears to be calibrated . . a properly working TX will read at about -23 . . .
- Tim
ORIGINAL: Mac_Man_UK
-23 dBm ???
0dBm is 1mW, -23dBm equates to 5uW !!
-23 dBm ???
0dBm is 1mW, -23dBm equates to 5uW !!
02-09-2008, 10:47 AM
#32
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RE: Are you using Extremelink (XPS) and why
Hello,
I am using XPS in all my planes. I chose this solution so that I could continue to use my Futaba 9C. Also, in the future if I decide to use a different transmitter, I won't have to replace my receivers.
I am using the system in a medium sized glow engine plane, as well as a hangar of 1/4 scale warbirds--all gas engines 50cc - 100cc. I am pretty confident in the system, but spend a lot of time with new installations and range checks. I use tie wraps to keep all wires away from the RX antenna and also put foam around the RX so that no wires can move during flight and touch the RX antenna. For what's it worth, when I first got this system, I installed it in my trusty 4*60 that I still use for club fun flys and tested as thoroughly as I could. I did a lot of ground testing and then took the plane way up high, almost out of sight, same thing low on the horizon and then flew the plane repeatedly in every orientation. I did this for many flights before trying it in one of my expensive warbirds. Not the same as using testing equipment, but I never experienced any loss of control, "glitches" or other unusual behavior.
-Ed B.
I am using XPS in all my planes. I chose this solution so that I could continue to use my Futaba 9C. Also, in the future if I decide to use a different transmitter, I won't have to replace my receivers.
I am using the system in a medium sized glow engine plane, as well as a hangar of 1/4 scale warbirds--all gas engines 50cc - 100cc. I am pretty confident in the system, but spend a lot of time with new installations and range checks. I use tie wraps to keep all wires away from the RX antenna and also put foam around the RX so that no wires can move during flight and touch the RX antenna. For what's it worth, when I first got this system, I installed it in my trusty 4*60 that I still use for club fun flys and tested as thoroughly as I could. I did a lot of ground testing and then took the plane way up high, almost out of sight, same thing low on the horizon and then flew the plane repeatedly in every orientation. I did this for many flights before trying it in one of my expensive warbirds. Not the same as using testing equipment, but I never experienced any loss of control, "glitches" or other unusual behavior.
-Ed B.
02-11-2008, 03:21 PM
#33
RE: Are you using Extremelink (XPS) and why
ORIGINAL: tychoc
Yes, I was the original poster of that thread. I really tried to get XPS to hop and gave it many opportunities, but no hopping occurred...
-tychoc
ORIGINAL: jonkoppisch
You may want to check this thread just started. http://www.rcgroups.com/forums/showt...76#post9094981 The xps was tested with professional equipment for hopping if there was a sudden and/or a slow rise in interference... It failed!!!! The person testing lost his plane in the same manner as my jet...
You may want to check this thread just started. http://www.rcgroups.com/forums/showt...76#post9094981 The xps was tested with professional equipment for hopping if there was a sudden and/or a slow rise in interference... It failed!!!! The person testing lost his plane in the same manner as my jet...
-tychoc
02-11-2008, 03:31 PM
#34
RE: Are you using Extremelink (XPS) and why
Lot's of threads were deleted...
Alert - My hopping tests, and the zombie state reproduced
Poll - I am concerned !
Alert - Another LOCK OUT
Discussion - 2nd Test Seems to Verify No Hopping of XPS
Fan Boys, please come in here and show your FORCE
Discussion - Hop, Hop, Hop
Discussion - To hop or not to hop, that's the question (and I have some answers)
Alert - My hopping tests, and the zombie state reproduced
Poll - I am concerned !
Alert - Another LOCK OUT
Discussion - 2nd Test Seems to Verify No Hopping of XPS
Fan Boys, please come in here and show your FORCE
Discussion - Hop, Hop, Hop
Discussion - To hop or not to hop, that's the question (and I have some answers)
