That depends entirely on the modulation method. At 8 bits per symbol, that could be as low as 375hz. Eight bits per symbol is very sensitive to noise though, and probably isn't interesting to this group. PSK31 sends one bit per Hz bandwidth and is much more robust on HF, and is probably a better reference. At 3khz bandwidth you might as well use SSB (it would sound better).
Here are some samples I created with this codec when I was investigating it (try using WinAmp if you have any trouble with your player): 3193bps: http://www.lekstutis.com/Artie/Ham/Codecs/Interconnects_F0.wav 4812bps: http://www.lekstutis.com/Artie/Ham/Codecs/Interconnects_F1.wav 6836bps: http://www.lekstutis.com/Artie/Ham/Codecs/Interconnects_F2.wav 12148bps: http://www.lekstutis.com/Artie/Ham/Codecs/Interconnects_F5.wav 16bits 32khz (source): http://www.lekstutis.com/Artie/Ham/Interconnects_32K16B.wav Later, Artie Lekstutis KC2MFS >What kind of RF bandwidth would the 3 Kbs require? > > > Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
