[time-nuts] T.I. questions

[Joseph Gray]

Oops, I missed a digit on that last email. it should be 10,000 s
average for 100 ps resolution.

Joe Gray
W5JG


On Wed, Feb 4, 2015 at 1:58 PM, Joseph Gray <jgray at zianet.com> wrote:
> Sorry for the simple questions. Old hands can simply ignore this
> message if it bothers you.
>
> I have an HP 5328A that I have pieced together from broken units. As
> soon as I make a ribbon cable for the GPIB card, I want to use it for
> T.I. measurements. I know it isn't nearly as good as a 5370, but it is
> what I have at the moment.
>
> The manual states that the Universal module adds dithering to the
> multiplied 100 MHz internal reference. If I use a GPSDO as an external
> reference, will this multiplying/dithering allow me to use the same
> GPSDO (divided down to PPS) on either the START or STOP inputs? If
> not, then how about using a different GPSDO as the external reference?
> Or even an FE5680A rubidium?
>
> If I read the specs correctly, using T.I. averaging on the 5328A, a
> 1000 s average should get me 100 ps resolution? With this particular
> instrument, what is the best, useful resolution I can expect?
>
> Joe Gray
> W5JG