Ed, If I remember correctly, when a DATA mode frequency memory is stored in the K3 the data sub-mode is remembered as part of the information stored at the time the memory is created. For example, if your K3 data sub-mode happened to be AFSK-A at the time the memory was stored, I believe the sub-mode will be restored to AFSK-A every time you recall that memory. If this is correct, the way to get it to remember the DATA-A sub-mode would be to delete your existing DATA mode memories and re-create them from scratch with the radio in DATA-A sub-mode.
As I understand it, the K3's audio output is cut off at 4.2 kHz in all modes, including AM and FM, regardless of which IF filter is selected. Assuming no EQ is applied (EQ is disabled in DATA modes), the output audio response will be nominally flat between approx. 200 Hz and 4.2 kHz, subject to IF filtering and the SHIFT and WIDTH DSP control settings. If your widest IF filter is 2.8 kHz, then your maximum nominally flat audio bw in SSB-based modes (including DATA-A as well as USB) will be 2.8 kHz, although you can use the SHIFT control to shift the audio passband within the overall 0.2 - 4.2 kHz audio window. Note also that even if you have a wider IF filter that is enabled in DATA modes, the wider bandwidth it provides will only apply during receive - your transmit bandwidth will still be limited by the 2.7 or 2.8 kHz transmit IF filter. 73, Rich VE3KI Ed KL7UW wrote: > What we want for WSJT modes is full bw, totally flat freq. > response. If I could get 13-KHz it would be great for JT-65 but it > appears the K3 DSP limits audio out to about 4-KHz except in AM or FM > modes (which are useless for soundcard programs). > --------------------- > BTW no one has answered my question how to set DATA-A modes when > using the K3 Memory Editor. I seem to get random settings when I > chose DATA-A with the Editor. I want it to default to DATA-A USB for > use of most soundcard sw. > > I can manually change this with DATA MD key but the change is not > saved and it reverts to whatever Memory Editor chose if I change > frequency by selecting memory channels. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
