Started by planeman, October 07, 2012, 21:19:31 pm
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Quote from: pchristy on October 09, 2012, 17:54:40 pmAll CE testing does is show that *your* equipment won't cause unnecessary interference to others. It says nothing about the immunity of *your* system to outside interference from (say) mobile phones, nor does it say anything about the quality or merchantability of your system!
Quote from: pchristy on October 10, 2012, 17:36:58 pmWell, for 2.4 GHz equipment, the standard it has to comply with is ETSI En 300 328. Looking though it (and it is mind bogglingly long and complex!), I can find plenty about spurious emissions, but other than a very brief note about receiver blocking (and that only applies to adaptive equipment operating above 10dBm eirp), nothing about susceptibility to outside interference! I think the one for 35 MHz is similar, though I can't find it at the moment (I'm at work).Where have you seen a reference to RF susceptibility?
Quote from: Wiz on October 11, 2012, 10:28:40 am...and isn't it true that the transmitter mentioned in the BMFA original bulletin was Multiplex? Could all of this be because of a poorly designed transmitter or has the phenomenon been recorded in other brands?
Quote from: pchristy on October 11, 2012, 12:11:48 pmYes, but a lot of it doesn't apply to our equipment (stuff like mains isolation / safety / etc),
Quotethe powers that be are not in the slightest bit interested in deficiencies in *our* equipment, as long as it doesn't disrupt anyone else's!
QuoteTo back up what Tony is saying, I've never had an issue with JR kit. But equally, I've never had a problem with some of my older transmitters dating back to the 60s and 70s, when transmitters came in proper metal cases (which equals very good screening!) rather than plastic!
Quote from: GlowFly on October 11, 2012, 17:04:09 pmTrue in the case of mains isolation. But if there isn't mains you also need to claim compliance with the Low Voltage Directive, where if I remember right all voltages must be under 50v. Usually the case with r/c transmitters! Basically the stuff that goes on behind CE marking is much more involved than most people think if you were serious about it. The compliance files we had to keep on each piece of equipment were substantial.I agree that it is likely to need a number of reports or equipment complaints to trigger an investigation, unless accusations are made after a serious accident, but if formally/responsibly testing for CE compliance, susceptibility testing is definitely a requirement.I think we're agreed. I don't think it's ever happened to me on any brand but I have witnessed it on a very few occasions so I choose not to carry a phone on the flight line (unless I forget, but the sky didn't fall in when I did!). I'll bow out now since I don't see how I can contribute anything useful to the discussion.Steve
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