> Since I am well familiar with the Analog Devices DDS circuits, this has > been my very first idea. The most simple one for that purpose would be a > AD9851 (180 MHz, 32 Bit, built in clock multiplier). But when I used the > DDS design tool available on the AD web pages I received a big warning > saying that using a "clock X multiplier" frequency that is a near > integer of the output frequency generates lots of unwanted spurs. Which > was new to me since I do so in my GPSDO but should they not know better? > This is why I dropped the thoughts on DDS.
Some AD DDS chips have a "SpurKiller" channel built into them. See page 3.42: http://www.analog.com.ru/Public/HS%20Systems%20Part%203%20Speaker%20Notes.pdf -- http://www.wearablesmartsensors.com/ http://www.softwaresafety.net/ http://www.designer-iii.com/ http://www.unusualresearch.com/ _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
