Before SDR, I always tried to set my transmit center frequency around 1500 Hz, with the assumption that this was within the normal passband of my TS570 (speech compressor off, of course).
With SDR on RTTY, when I narrow the bandwidth to 300 Hz on RTTY (LOVE THOSE FILTERS!), I see that on DIGI-U the center of the passband is at about 1500 Hz above center (makes sense). But on DIGI-L, it's about 2200 Hz below center. I have used DIGI-U just like I always used USB on my 570, but the other day a ham emailed me and said I was reversed and should be using the other sideband. So when I switched to SIGI-L, that's when I made this observation. Any thoughts/guidance on this appreciated. Mark Lunday, WD4ELG Greensboro, NC FM06be [email protected] http://wd4elg.blogspot.com http://wd4elg.net _______________________________________________ FlexRadio Systems Mailing List [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
