Yes. Future. Wayne
On Sep 24, 2014, at 2:08 PM, Matt VK2RQ <matt.vk...@gmail.com> wrote: > A long long time ago on another mail list there was a discussion about why it > was not possible to use dual watch together with the RX SHFT set to an 8kHz > shift. If this would be implemented in a straightforward way, such a shift > would result in an asymmetry in range of frequencies your second VFO could > cover above and below the first VFO (eg. ADC covers LO+/-15kHz, VFO_A is > LO+8kHz, so VFO_B can range from VFO_A-23kHz to VFO_A+7kHz. > > However, if you tried to set VFO_B to greater than VFO_A+7kHz, one > possibility would be for the KX3 to change the shift from LO+8KHz to LO-8kHz. > This would then permit coverage from VFO_A-7khz to VFO_A+23kHz. Everything > would seem to be on the opposite sideband, so the demodulation code would > need to compensate. > > By combining these two modes of operation, the dual watch could be extended > so VFO_B has a ranges of VFO_A +/-23kHz. If you used a greater IF shift than > 8kHz, say 11kHz for example, then this could extend the range even further, > say +/-26kHz. > > Regardless whether such such extended coverage is implemented for dual watch, > the PX3 would need to behave sensibly when using of dual watch with IF shift. > > 73, > Matt VK2RQ ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
