[time-nuts] 5370B arrived - any FAQ
Chuck Harris
cfharris at erols.com
Thu Jun 19 14:27:35 UTC 2008
Because you need something that has a finely variable delay in the
range of 2 to 5ns, a pulse width adjustable from 5 to 50ns, and a minimum
transition time of less than 1ns. And, it has to be able to drive 50 ohms
to +/-1V.
The 8015A's shortest delay is 20ns, and its minimum pulse width is 10ns, and
its minimum transition is 6ns.
Basically, it isn't even close to being good enough to calibrate a 5370[AB].
Looking through the available pulse generators, I find some have one needed
characteristic, but none of the others. The 8082A seems to be exactly what
is needed (but just barely).
-Chuck Harris
phil wrote:
> Why an 8082A, that's a 250MHz unit. Would not an 8015A 50MHz work. I think
> it's the same only with a lower bandwidth.
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