Don, Thanks for your description. I didn't mention the Width control and display because I understood those. Just was not sure of the interpretation of the 0.68 -- now knowing it is the sidetone pitch makes sense but this sort of thing was not found in the documentation that I could find.
phil On Jan 31, 2014, at 11:26 AM, Don Wilhelm <[email protected]> wrote: > Phil, > > Yes, "FC" means Frequency Center, which is where the passband is centered. > The "*" means it is the default (the same as your sidetone pitch setting for > CW). > You did not ask about the Width display, but it is the width of the passband > and extends half that vale on either side of FC. Those numbers are much more > accurate than the low resolution graphic on the display, but the display > gives you an idea about which part of the ballpark you are in. > > For SSB and other voice modes, the default FC is 1.5 kHz, but I would suggest > you not worry about that, but use Hi-Cut and Lo-Cut instead of shift and > width and directly define the low and high frequency edges of the passband. > You will not be able to cut much more than to 350 or 400 Hz on the low end > before loosing intelligibility, but you can cut the high end substantially > and still maintain intelligibility although some of the voice characteristics > become a bit more 'pinched'. > > Attempting to use Width and Shift with voice modes will require you to > reposition the Shift each time you change the Width. > > 73, > Don W3FPR > > > > On 1/31/2014 1:48 PM, Phil Hystad wrote: >> I have had my K3 for four years but rarely make use of the passband tuning >> features. Today though I was experimenting with APF and the passband >> controls and learned that I really do not know what I am doing. >> >> In particular, the VFO B display is a mystery to me during passband tuning >> and APF SHIFT tuning. For example, in passband tuning (APF not enabled), >> the VFO B display says FC and then a number like 0.70 or whatever. What >> does "FC" mean (I can guess, but that would not be useful) and what is this >> number. I scanned all the documents I have and have not found descriptions >> of the content of the VFO B readout during passband tuning. I know it has >> something to do with shifting the frequency of center (I think) so maybe FC >> means Frequency Center. Also, there is an asterisk in the field, like: FC >> *0.68. Maybe someone can interpret the meaning of that. >> >> If I knew the definition for passband tuning for the VFO B field content I >> could probably guess at the meaning of the APF enabled display which is >> similar such as: APF *0.68. >> >> I have found lots of description of passband tuning and that part of the >> display showing the passband width and position but nothing describing the >> VFO B contents (not covered in documentation on alternate VFO B displays >> either). >> >> > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
