Multiple EPRIBs on same aircraft?
Thread Starter
Joined: Jun 2003
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From: EuroGA.org
Apparently, it's OK, because commercial boats have two or more anyway.
It probably relies on random variations in the crystals. If you had two transmitting on exactly the same frequency, from the same spot, I don't see how you could modulate any information (e.g. the GPS position) on to the carrier. The data rate must be low enough to keep the sidebands close enough to the carrier, so that two of them don't interfere.
It probably relies on random variations in the crystals. If you had two transmitting on exactly the same frequency, from the same spot, I don't see how you could modulate any information (e.g. the GPS position) on to the carrier. The data rate must be low enough to keep the sidebands close enough to the carrier, so that two of them don't interfere.
Joined: Jan 2007
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From: England
That's useful to know....
.... if we go anywhere near water my mate insists on having one round his neck, wearing his lifejacket, clutching the dingy, the aircraft has a properly installed/approved one ..... and we've got a twin!!
.... if we go anywhere near water my mate insists on having one round his neck, wearing his lifejacket, clutching the dingy, the aircraft has a properly installed/approved one ..... and we've got a twin!!
Joined: Sep 2006
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From: Aylesbury,Bucks
Remember the beacon is not a continuous transmission and "chirps" every so often so in probability they will not collide or if they do then they will slowly drift apart and then two "chirps" will be heard. This method saves power and also leaves the frequencies available for multiple use.
