[time-nuts] Clock Driver Design

[John C. Westmoreland, P.E.]

Tom,

If you are building your own board - I have used this part:

SN74LVC1G125  - Single Bus Buffer Gate with 3-State Output

and it is suitable for the job.  I have measured the performance of the
logic family - and what I observed follows what is in the spec sheets from
TI.  I did not officially record
my measurements as I didn't do the testing on precision, calibrated
equipment.  But I did do all testing at 10MHz and I did also look at the
1PPS signal of course.

I have used other parts in this logic family from TI and have had good
results at these frequencies.

73's,
John
AJ6BC


On Thu, Sep 26, 2013 at 1:22 PM, Bob Bownes <bownes at gmail.com> wrote:

> TV video distribution amps work very nicely. Even better if you open them
> up and change the matching from 75ohm to 50. :)
>
> Bob
>
>
>
> On Thu, Sep 26, 2013 at 3:19 PM, Glenn Little WB4UIV <
> glennmaillist at bellsouth.net> wrote:
>
> > Would an analog video distribution amplifier work?
> > These are available cheap.
> > TV stations used these eight or so in a frame.
> > The frame had a power supply and the BNC i/o connectors.
> > Each da would drive 6 or 8 outputs.
> >
> > 73
> > Glenn
> > WB4UIV
> > Retired TV CE.
> >
> >
> >
> > At 01:28 PM 9/26/2013, you wrote:
> >
> >> I am looking into various degrees of craziness.  The source is CMOS and
> >> there are plenty of 1 in to N out parts designed to drive clocks on a
> PCB
> >> but not much is said about driving clocks on to a random length of coax
> to
> >> another piece of equipment and what additional precautions that might
> >> warrant.  I am also considering making a sine wave output and maybe
> other
> >> frequencies.
> >> Tom
> >>
> >> On 9/26/2013 4:34 AM, Bob Camp wrote:
> >>
> >>> Hi
> >>>
> >>> Standard high speed CMOS logic works pretty well. How crazy are you
> >>> trying to get?
> >>>
> >>> Bob
> >>>
> >>> On Sep 26, 2013, at 1:48 AM, Tom Minnis <Tom_minnis at att.net> wrote:
> >>>
> >>>  I am working on a small clock distributor and wanted to get some ideas
> >>>> on what works best for 10MHz and 1PPS driver circuits.  I remember
> sifting
> >>>> through the archives a year or so ago and tripped on some discussion
> of
> >>>> this but I can't find it anymore.
> >>>> Tom
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