Wow - Now you're really taxing my memory. Radios tuned from 2Mhz to 2Ghz. LO was high side mix and I think ran from roughly 3-5Ghz, comprised of 4 switched VCO's. I think the IF was always 70Mhz. I'd have to revisit quite a bit to come up with more info than that. Sorry I can't remember more - that was 20 years ago this year, first job out of school. Yikes, I'm getting old.
Brent On Mon, Jan 6, 2014 at 12:45 PM, Ulrich Bangert <df...@ulrich-bangert.de>wrote: > Bob, > > I appreciate your postings a lot but can you please explain what property > you are referring to with a sentence like > > > you can get into the high 150’s to low 160’s on a 10 MHz > > Using numbers without units (maybe: quail eggs per sqare inch ?) makes it > difficult to understand what you are going to say even for experienced time > nutters. > > Brent, > > > Precious little to add to this, just to confirm that > > back in another life at Watkins Johnson (early 90's), > > we used CPLD's for low phase noise dividers all the time. > > My work at the time was focused on everything but the divider. > > Ok, but how much different input signals did you have for one CPLD? If your > answer is "1" then you have given youself the explanation why they worked > ok. > > Best regards > Ulrich > > > -----Ursprüngliche Nachricht----- > > Von: time-nuts-boun...@febo.com > > [mailto:time-nuts-boun...@febo.com] Im Auftrag von Bob Camp > > Gesendet: Montag, 6. Januar 2014 13:28 > > An: Discussion of precise time and frequency measurement > > Betreff: Re: [time-nuts] 'CPLDs for clock dividers' Thread > > > > > > Hi > > > > If you disable all the internal clocks (normally fairly easy) > > and your supply is clean and it’s a modern high speed part, > > you can get into the high 150’s to low 160’s on a 10 MHz > > output with a CPLD. > > > > If you have one of those wonderful old designs where the > > charge pump clocks (or what ever) stay on all the time, you > > will be in the 120’s to 130’s. > > > > Bob > > > > On Jan 5, 2014, at 9:11 PM, John C. Westmoreland, P.E. > > <j...@westmorelandengineering.com> wrote: > > > > > Hello All, > > > > > > I was looking at the archives - what was the outcome of this: > > > > > > Thanks to everyone for their advice. I bought a CoolRunner II > > > development board (only $39!) and will let you know how it goes. > > > > > > Matt > > > > > > On Wed, Feb 3, 2010 at 10:59 AM, Matt Ettus <boyscout at gmail.com > > > <https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts>> wrote: > > >> * Does anyone have any experience using CPLDs for very low phase > > >> noise > > > *>* dividers? You can get an XC9536XL from Xilinx for > > around $1, and > > > I > > > *>* thought it would make a good divide by 2 through 10 device. > > > *>>* Matt* > > > > > > A lot of the discussion focused on the difficulties of > > downloading the > > > tools for Altera or Xilinx - the Max II family from Altera was > > > recommended - but there was no apparent outcome or > > resolution to this > > > thread - seemingly. > > > > > > Does anyone have that CPLD recommendation? > > > > > > Thanks, > > > John Westmoreland _______________________________________________ > > > 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. > > > > _______________________________________________ > > 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. > > _______________________________________________ > 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. > _______________________________________________ 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.