Stewart, I also use the Softrock.
My settings with CW Skimmer: Radio: SoftRock IF Sampling rate: 96 kHz CW pitch: 550 Hz Audio IF: minus 23379Hz My settings with Power SDR-IF (love this one because it nicely integrates with the K3): Setup, General, Radio Model: SDR-1000 Setup, Audio, Sampling Rate: 96000 Setup IF, IF Frequencies, Global offset minus 23379, LO center 8215000 Hopes this will point you in the right direction. 73 Arie PA3A Op 20-1-2012 11:52, Stewart Rolfe schreef: > Not sure where best to post this but will try here first... > > I've set up my Softrock panadapter again using NaP3 this time. Works very > well with my M-Audio PCI card (96Khz) and the WBIR is effective too. One > thing I wonder about is connected with the offset between the IF and the SR > local oscillator frequency. > > The SR local osc runs at 8192 Khz which puts it outside any K3 filter > passband. When I configure NaP3 with this frequency (and zero global offset > etc) the K3 and panadapter display are exactly in sync and I can point and > click etc. But the tuning point is naturally offset from the LO by ~23 Khz > which means there's only about 25Khz 'usable' to one side of the tuning point > in the display before it goes into alias territory (96/2 minus 23Khz...). > Rocky seems to simply cut off the display at the sampling edges but NaP3 (and > PSDR/IF?) doesn't and this can be a bit confusing when aliases are displayed. > > This is easily worked around by for eg winding up the zoom to make the > illegal band disappear, but it would be nice to be able to have LO and filter > centre coincident. I notice that the background colour indicates +/- 48Khz > but it's centred around the IF centre and not the LO frequency which would be > better. > > Hope I've explained myself OK..! > > 73, > > Stewart, GW0ETF > ______________________________________________________________ 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
