sdr1k in use here: On setting DDS offset I find that turning off "spur reduction" tends to avoid some confusion. Also, certain settings of display "refresh rate" can cause false nulls in the phase rotation. After I get used to the setting of the offset I can usually set it without much fuss beyond turning off "SR"!
Seems pretty stable once it warms up (10 - 15 min maybe). Jim - W4YXU Robert Cleve wrote: > I would be very interested in hearing from a number of people regarding the > value of DDS Clock Offset they may be using in the Expert mode to to achieve > and maintain a precise Phase relationship with WWV's carrier at 10 or 15 > MHz? I have found a number of values that seem to work from very low to > very high. What is the preferred (correct?) value or range of values and > why? Is one DDS value more a accurate and stable than another when the > rotating phase vector stops rotating? Yes, I know you can just as easily > use the Calibration tab but I am looking for finer tuning to zero beat on > WWV than I can get when just using the automatic Calibration tab. > > Thanks and 73, > > Bob, KW4CQ > _______________________________________________ > FlexRadio Systems Mailing List > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > Knowledge Base: http://kb.flex-radio.com/ Homepage: > http://www.flex-radio.com/ > > > ------------------------------------------------------------------------ > > > AVG sez OK! > Checked by AVG. > Version: 8.0.134 / Virus Database: 270.4.5/1533 - Release Date: 7/3/2008 7:19 > PM _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kb.flex-radio.com/ Homepage: http://www.flex-radio.com/
