[time-nuts] Frequency counter recommendation

K. Szeker szeker.k at gmail.com
Thu Dec 16 14:36:06 EST 2010


Hi Bob,

If a 256 ball package is the solution for these FPGA, I would prefer it in
256 QFP-package version-if exists.
These will be solderable for the good "home-specialists", bat a BGA (even
with "only" 256 balls) is a real problem for home labs...

Karesz

2010/12/16 Bob Camp <lists at rtty.us>

> Hi
>
> Yes indeed, been there done that. Not very hard at all.
>
> All you need is the six layer pc board (can be bought), the FPGA (Digikey
> has them), a few of these and a couple of those. Spend less than $100 and
> you are in business if the PC board volume is high enough.
>
> In this case the next step in the business is to solder the 256 ball 1 mm
> spacing BGA package down on the pc board. Not so easy without the right
> tools...
>
> Bob
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Don Latham
> Sent: Wednesday, December 15, 2010 3:48 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Frequency counter recommendation
>
> OK, time-nuts, here's the gauntlet. can't "we" generate a design for a
> PC-based FPGA or chip setup that would be generally useful as a counter?
> We've seen thorough discussions about trigger jitter, which IMHO is the
> fundamental problem. And isn't the PIC2 Time base from 10 MHz standard,
> all else should be straightforward.
> I'm not a designer, just a messer-arounder, or I'd give it a shot. Robot
> Basic is a nice PC software maybe.
> Don
>
> J. L. Trantham, M. D.
> > I suspect that this question will lead to a discussion of Dual Mixers but
> > as
> > far as the counter question goes, I would recommend you consider an HP
> > 5370B.
> >
> > Joe
> >
> > -----Original Message-----
> > From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> > Behalf Of Dave M
> > Sent: Wednesday, December 15, 2010 1:55 PM
> > To: TimeNuts
> > Subject: [time-nuts] Frequency counter recommendation
> >
> > I'm a retired electronics tech and computer programmer.  I have a pretty
> > decently equipped shop for almost all of my projects and experiments.
> > However, my time and frequency equipment is a bit long in the tooth.  I
> > have
> > a couple old HP 5328A counters (commercial version; not the military
> > version), one with a 10544, the other with a 10811 oscillator.
> > I have an HP Z3801A that has been operating well for several years, and
> > recently acquired a TBolt to keep the counters in tune.  I also have a
> > good
> > distribution amp and  couple of old Montronics (Fluke) frequency
> > comparators.
> > What I'm looking for now, is a recommendation for a good low-cost (<$400)
> > counter that will get me on the way to performing some of the "down in
> the
> > grass" noise, jitter and deviation tests that the more learned members of
> > the group discuss.  I know that new equipment is far out of my budget,
> but
> > I'm also aware that some of the older, now obsolete (also cheaper)
> > equipment
> > is quite capable of doing what I want to do. I prefer HP equipment since
> > manuals are much easier to find than most other brands.
> > I'd also like recommendation for a good low-cost GPIB controller that
> > allows
> > me to write software to control some of my instruments.  I have
> experience
> > writing software in BASIC on a Fluke 1722A controller.  I've seen these
> > controllers on the Bay and other online vendors, but I've not located the
> > BASIC discs for them.  Any advice?
> > I realize that a counter is not the only piece that I need, but it's
> first
> > on my list.  Other, more applicable equipment is on my want list, but
> will
> > have to wait for a bit.
> >
> > Thanks for advice,
> > David
> > dgminala at mediacombb dot net
> >
> > _______________________________________________
> > time-nuts mailing list -- time-nuts at febo.com
> > To unsubscribe, go to
> > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> > and follow the instructions there.
> > -----
> > No virus found in this message.
> > Checked by AVG - www.avg.com
> > Version: 10.0.1170 / Virus Database: 426/3317 - Release Date: 12/15/10
> >
> >
> > _______________________________________________
> > time-nuts mailing list -- time-nuts at febo.com
> > To unsubscribe, go to
> > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> > and follow the instructions there.
> >
>
>
> --
> "Neither the voice of authority nor the weight of reason and argument are
> as significant as experiment, for thence comes quiet to the mind."
> R. Bacon
> "If you don't know what it is, don't poke it."
> Ghost in the Shell
>
>
> Dr. Don Latham AJ7LL
> Six Mile Systems LLP
> 17850 Six Mile Road
> POB 134
> Huson, MT, 59846
> VOX 406-626-4304
> www.lightningforensics.com
> www.sixmilesystems.com
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at 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 at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>



More information about the time-nuts mailing list