> I find if I turn the RTTY dual-tone filter on when the width > is wider then 400 Hz and then off, the bandwidth doesn't > return to what it was before the use of the DTF, but is left > at the narrow bandwidth appropriate to the DTF. It seems to > me that it'd be correct to revert to the previous width setting. > > Also, turning on the DTF doesn't switch roofing filters, either. > > Am I missing something?
I can duplicate this except the critical bandwidth is 500Hz, not 400Hz. I hadn't noticed this previously because I never turn on the DTF with main DSP bandwidth greater than 400-500Hz. (I typically operate RTTY with a DSP bandwidth of 200Hz plus the DTF.) The DTF forces any DSP bandwidth greater than 500Hz, back to 500Hz. In other words 500Hz is the widest DSP bandwidth available with the DTF. However, I agree that turning off DTF should return the DSP bandwidth to what it was before. I'm sure Wayne will allow this to be added to his "list" unless there is some technical reason it can't be changed. I hope the priority on this issue is low, though, because the firmware engineers should be working on more important things. 73, Ed - W0YK _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
