Yes, lots of modern transceivers have a dedicated data mode, but they're generally too wide for optimal RTTY reception. In contrast, consider the Twin Peak filter available on recent Icom transceivers, for example; it's only available with the transceiver's mode set to RTTY.
73, Dave, 8P9RY From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] On Behalf Of g4ilo Sent: Tuesday, March 09, 2010 6:59 PM To: digitalradio@yahoogroups.com Subject: [digitalradio] Re: 1976 FCC - Delete all Emission Types from Part 97 I've heard this argument many times, Dave, but whilst it was probably true 10 or more years ago, surely all decent modern transceivers have a dedicated data mode that allows the use of narrow filters? Heck, even the humble FT-817 has one. Julian, G4ILO --- In digitalradio@yahoogroups.com <mailto:digitalradio%40yahoogroups.com> , "Dave AA6YQ" <aa...@...> wrote: > > The advantage of using FSK is that one can take advantage of the excellent > RTTY filters built into some transceivers. These filters are generally not > available when operating in USB/LSB. This is particularly important to > contesters operating in a crowded environment and DXers dealing with weak > signals.