At 03:41 PM 7/11/2006, Jerry Sharp wrote: >What's the phase noise like from a HP Z3801A GPS standard? I have one >and have thought about interfacing to my SDR. Having super frequency >accuracy would be nice, but not at the expense of degrading overall >system performance.
Funny you should ask.. I have one too. the phase noise is fairly good on those, because it's derived from a ovenized XO (the HP 10811A, as it happens). The problem is that when you multiply it up by 20 in the DDS's internal multiplier, you take a 20Log(N) dB hit, or 26 dB. The XO in the SDR1000 now is quieter. >Right now I use my Z3801 to discipline test equipment. Being able to >measure 10.3681 GHz to within a few 10's of Hz is nice. > >Thanks and 73, >Jerry Sharp, KD0GS _______________________________________________ FlexRadio mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
