[hpsdr] PSK31

[n3ick at cox.net]

When running this mode I see a frequency shift betweeen the receive and transmit frequencies when using the Mercury clocks it does not appear when I use the Penelope clocks. It does seem to get better the longer they run which would suggest the xtal frequencies may drift a little. I have run the cal with WWV and test equipment, I also have the latest and greatest software and firmware from the repositories using svn update.  This difference is small 20-40 hz but when using close in filters you sometimes don't know when someone is answering your CQ. The filters are great and no agc pumping it's wunderbar.