> Paul L Schmidt, K9PS wrote: If you wanted to produce a pair of PSK31 > signals separated by, say, 150 Hz, with a pilot carrier between them, > it'd simply be a matter of building the appropriate waveforms to make > it happen that way. > Basically, a cheap software-defined radio, covering a small segment > of a single band with a single crystal oscillator.
Can you describe this to a RF digital design newbie, please? > By the way, I just checked part 97 -- ISB is legal (type "B" > emission) within certain guidelines... Can you clarify this as well? So many different things have been said about the relationship of the regs to this mode. And, if the FCC has indicated an intention to render the mode illegal, or has tightened it too far to permit reasonable experimentation perhaps the list members can join together and ask them to make a change -- and explain why? Merely because a mode may be abused is no reason to make it illegal. There is no reason that the FCC cannot set and strictly enforce reasonable maximums for SSB, AM, ISB, DSB, and digital mode bandwidth - to enforce reasonable sharing of limited spectrum -- leaving the mode selection to the users. FM is no wider than common AM and many overdriven SSB signals heard every day. SSTV and DSSTV as well. Limit them all to a reasonable maximum and set the modes free -- users will vote with their mode-selectors. It has been well documented that certain modes do not play well with others, generally difficult to identify and prone-to-QRM semi-auto and auto digital modes -- the restriction of those to narrow segments of the bands makes good sense. Otherwise, with a reasonable enforcement presence, the rest of the bands may be pretty wide open and all modes permitted. WDYT? -- Thanks! & 73, doc, KD4E ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Projects: http://ham-macguyver.bibleseven.com Personal: http://bibleseven.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
