[time-nuts] 1 PPS 50-ohm driver

[Douglas Bercich]

I was looking but can't find a V/div anywhere on that. Maybe my old eyes or not enough coffee. 500mV?

> On Apr 16, 2016, at 11:58 PM, Stewart Cobb <stewart.cobb at gmail.com> wrote:
> 
> Here's a scope photo from a PPS driver built exactly to the description in
> my earlier post.  It's a 74ACT04 in a TSSOP package, with five parallel
> outputs driving five 220-ohm resistors (0402 SMT) to form a 50-ohm output.
> 
> The photo shows 2 ns rise time for the leading edge of the pulse. The scope
> bandwidth is around 1 GHz, so this measurement is pushing its limits.  The
> pulse looks fairly clean, but with a bit more care in layout and cabling,
> it might get even better.
> 
> Cheers!
> --Stu
> <IMG_20160416_213804.jpg>
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