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Old 02-10-2008, 08:52 PM   #578 (permalink)
jonkoppisch
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Default Re: Independent tests prove lack of frequency hopping with XPS

Someone else may have made the xps system hop although it's under strange circumstances...

Quote: Originally Posted by Eddie-extra
Hi,

Ok I'll try to repeat todays results....

Tested equipment in garage prior to taking it down the field, had a friend over with his Futaba system so thourght we would try and see if there was any issues with cross talk interferance or the like, I had my XPS system powered up and working on my plane without the TX aerial connected, the usb Analyzer on my computer was monitoring the 2.4 bandwidth showing my TX on channel 10 and a few other much smaller signals probably the local computer networks etc.
My friend then powered up his Futaba TX to see if would 'interfeer' in any way there was no noticable problems with the XPS system apart from a slight increase in servo buzz he then touched the XPS receiver with his Futaba aerial (extreme i know) whilst the xps Tx aerial was still not connected again no perceivable problems with the xps system.
During this time the readout on the USB analyzer showed all the channels were now varying/ peaking with signal which wasnt there previously. The Futaba was then turned off and all the channels returned to no significant signals except a strong signal on chanel 20 and nothing on 10. The XPS system was still working.
We then went to the field and flew.... my system had a lockout due to range problems his flew perfectly.....
http://www.rcgroups.com/forums/showt...13#post9125803
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