Joe,
The single-shot resolution of the Option 040 series input is 10 ns.
The T.I. interval option adds jitter to make the averaging useful.
If your PPS was instead a burst or a clock, comparing it to your clock
would make more sense and you could use that higher resolution.
If I had a GPIB interface for my 5328A, I would play around with it more.
I think I recall a 10 ps resolution being achievable according to fancy
specs, with averaging to it's max.
Cheers,
Magnus
On 02/04/2015 09:58 PM, Joseph Gray 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
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