Hi It's all a matter of "how many bins". There are packages out there that will work with 64K bins. At an 8 KHz sample rate, that would give you 1/8 Hz resolution. It would also take you a while to get the data. There is no practical limit to the number of bins, other than "how big is your computer". I suspect somebody out there has broken the million bin barrier.
Weather any of the fancy stuff has a usable interface (rather than C code), or will hook up to a sound card - who knows... Bob On Mar 21, 2011, at 11:09 PM, paul swed wrote: > Interesting because its going to be very hard for spec lab to do it. I > experimented tonight and the results were not good. > What I can say is the 3586 is stable to spec labs resolution. > > On Mon, Mar 21, 2011 at 7:43 PM, Bob Camp <[email protected]> wrote: > >> Hi >> >> I forget exactly which programs do which, but there are some free spectrum >> analysis programs that will get you way into the sub-Hz resolution with an >> <=8 KHz sample rate. >> >> Bob >> >> >> On Mar 21, 2011, at 5:44 PM, paul swed wrote: >> >>> It can actually be calculated and it is in Berts tables. >>> But last night I used spectrum lab and and could see the difference >> between >>> usb worse case.5 Hz and LSB .3Hz. It was very stable no drifting at all >>> while tuned to wwvb. But spectrum lab was not really optimized to give me >>> better detail. Sub Hz res. Need to figure out how you would do that >> actually >>> and maybe you simply can't. >>> Regards >>> Paul >>> WB8TSL >>> >>> On Mon, Mar 21, 2011 at 5:29 PM, Burt I. Weiner <[email protected]> wrote: >>> >>>> Bert, >>>> >>>> This looks very interesting. Have you been able to determine the actual >>>> error between the receiver's "tuned to" frequency and the 1850.000.00 Hz >>>> audio tone error out of the receivers audio for upper and lower SSB? >> This >>>> could make a good group project kit. >>>> >>>> Burt, K6OQK >>>> >>>> >>>> Date: Mon, 21 Mar 2011 10:11:04 -0700 (PDT) >>>>> From: "Bert, VE2ZAZ" <[email protected]> >>>>> To: [email protected] >>>>> Subject: Re: [time-nuts] HP 3586A/B/C entirely referenced to 10MHz: A >>>>> solution >>>>> Message-ID: <[email protected]> >>>>> Content-Type: text/plain; charset=us-ascii >>>>> >>>>> Hello Everyone, >>>>> >>>>> I have spent the last few weeks modifying the HP 3586 Selective Level >>>>> Meter. The >>>>> intent was to modify the unit and reference the SSB product detector >> stage >>>>> to >>>>> the internal reference. This would make the entire SLM locked to the >> 10MHz >>>>> reference, whether internal or externally fed. >>>>> >>>>> I have completed the modification with satisfactory results. I use a >>>>> DDS-Based >>>>> Function Generator 16-pin IC and a small 8-pin PIC micro. For more >>>>> detail, >>>>> visit my website at http://ve2zaz.net/HP3586_AD5962/HP3586_AD5962.htm. >>>>> >>>>> This has been a very good exercise from a DDS perspective and I have >>>>> learned a >>>>> lot on the topic. I would be interested in hearing from those who >> proceed >>>>> with >>>>> the mod. >>>>> >>>>> Thanks, >>>>> >>>>> Bert, VE2ZAZ >>>>> >>>> >>>> Burt I. Weiner Associates >>>> Broadcast Technical Services >>>> Glendale, California U.S.A. >>>> [email protected] >>>> www.biwa.cc >>>> K6OQK >>>> >>>> _______________________________________________ >>>> time-nuts mailing list -- [email protected] >>>> To unsubscribe, go to >>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>> and follow the instructions there. >>>> >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] >>> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >> >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
