Olivia would be a much better choice for critical information. Next would be Contestia, then MT-63. MFSK-16 should also be a consideration Within all 3 of these are variations in number of tones and bandwidth that will give you choices based on propagation. PSK-31 is a narrowband "one-shot" digital mode. It is the "least common denominator" as it requires zero learning curve. FEC, and finally ARQ will both yield more accurate results. I don't waste my time on the amateur bands with Pactor III due to the bandwidth arguments, but use it on NTIA freqqencies and it would be my first choice to save life and property. PSK would fall somewhere around the Campbell Soup can and twine category... Just tools in the toolbox. David KD4NUE
-----Original Message----- From: digitalradio@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Jose A. Amador Sent: Sunday, April 13, 2008 11:13 AM To: digitalradio@yahoogroups.com Subject: Re: [digitalradio] Best line of the day I agree. Static crashes are a powerful QRN source here too. Guess Olivia would be better, even 8/250 would stand a better chance of good copy. In spite of strong signals, if there is no "second chance", it does not matter much how clever Varicode is. It is certainly a big step ahead on quiet bands, but when QRM dominates, it is simply not enough. 73, Jose, CO2JA David Little wrote: > That's what happens when there are static crashes, like those from the > string of cells (or super-cells) moving across the Eastern US. > > Got FEC?? > > The station could improve the odds against him by using faster (or no > AGC) for quicker recovery time to lessen the lost data (again, no FEC - > no redundancy- no second chances)... > > Of course, the ease of using PSK as opposed to a mode with error > correction attracts the masses, and is is narrow bandwidth... > > The station probably was actually decoding everything, including the > static crashes and resulting lost data.... > > David > KD4NUE > > > -----Original Message----- > *From:* digitalradio@ <mailto:digitalradio%40yahoogroups.com> yahoogroups.com > [mailto:digitalradio@ <mailto:digitalradio%40yahoogroups.com> yahoogroups.com] *On Behalf Of *Andrew O'Brien > *Sent:* Sunday, April 13, 2008 8:17 AM > *To:* digitalradio@ <mailto:digitalradio%40yahoogroups.com> yahoogroups.com > *Subject:* [digitalradio] Best line of the day > > Copied on 40M PSK today > > " I am having a hard time copying even though your signal is 599 , not > decoding everything". > > Andy K3UK >
