PA3CW wrote: > > Hi all, > I recently completed a small SDR receiver called PM SDR. I am using it > with HDSDR software. Currently i have it connected to the IF out on my K3 > to use it as panorama view. In the software HDSDR i have to set some > offset values in the different modes to have the PMSDR and K3 in sync. > That is going fine, however, when i switch my filters i.e. in CW from > 400Hz to the standard 3,7 kHz the synchronisation is lost and i need > completely different offset values. Why is the offset changing if i > change filters? Is there any way i can correct this in the settings of my > K3? > Thanks > Dick PA3CW >
I'm sure you meant to say standard 2,7 kHz...not 3,7 kHz. The reason for the difference is that 5-pole filters (e.g. 2.7 kHz) have a large offset compared to 8-pole filters (e.g. 400 Hz). You can either install a 2.8 kHz 8-pole filter or compensate for the offset in your software. Unfortunately it is not possible to correct for this in the K3 itself. 73, Bill -- View this message in context: http://elecraft.365791.n2.nabble.com/External-PAN-with-PMSDR-question-on-filters-tp6782665p6783013.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ 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
