[time-nuts] Simple Interpolator

Brooke Clarke brooke at pacific.net
Sun Apr 29 17:00:41 UTC 2007


Hi Magnus:

I tried looking at the HP 5335A manual, but the one on the Agilent site has an 
unreadable A4 schematic.  Do you have a high resolution A4 schematic, or better 
a schematic of the interpolator?

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com



Magnus Danielson wrote:

> 
> Indeed. Three-four transistors and a handfull of caps and resistors. The
> Z3801A uses the 10 MHz clock and thus require a x1000 interpolation, which is
> easy enought to acheive. Look at the HP5335A service manual for further
> details. What you do is that you stretch the error-pulse (1-2 cycles) by
> charging a cap with one current and discharging it with another, the output is
> then run into a comparator for the sake of gain. This stretched pulse is then
> measured with the coarse clock and voila!
> 
> Cheers,
> Magnus





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