[aprssig] Automatic omni DF query
Dave at emv.co.uk
Tue Feb 10 08:56:44 CST 2009
Doppler DF works fine on AM signals, but you need a FM reciever, I guess
that's what you meant.
> -----Original Message-----
> From: Chuck Gooden [mailto:Chuck.Gooden at comcast.net]
> Sent: 10 February 2009 11:46
> To: TAPR APRS Mailing List
> Subject: Re: [aprssig] Automatic omni DF query
> If I am not mistaken, AM is used on 121.5 and Doppler systems
> will not be effective on AM signals.
> Rick Green wrote:
> > On Mon, 9 Feb 2009, Scott Miller wrote:
> >> Before anyone asks, these particular units won't work for 121.5 -
> >> I've only been able to get them to receive as low as 127 MHz.
> > That's a moot point anyway - I just read on another site
> that the
> > government has announced the discontinuance of satellite
> monitoring of
> > 121.5 and 223.0, obsoleting a huge 'fleet' of ELTs., so all the
> > boaters, aviators, and hikers will be forced to upgrade to
> the new standard.
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