[time-nuts] HP E1938A question

Richard (Rick) Karlquist richard at karlquist.com
Mon Apr 24 12:28:42 EDT 2017

The main issue is that the oven will no longer be at the
crystal turnover temperature.  If you are using it in
a benign environment, you might not need the extreme
thermal performance enabled by being dead nuts on the
turnover.  You still have an oven with thermal gain
in the 100's of thousands.

The test software had the ability to sweep the oven temperature
and allow you to find the turn over.  There was some way to
then set the oven to this temperature.  I don't know if anyone
currently knows how to make the software do this anymore.
I knew at one time, but have long forgotten.

Rick N6RK

On 4/24/2017 5:41 AM, GandalfG8--- via time-nuts wrote:
> I've just received an Ebay purchased E1938A, haven't tested it yet although
>  I do have a 14 day return option, but unlike previous purchases of these
> the serial number label is missing from the rear of the PCB so I have no
> obvious  way of knowing if the crystal is matched to the PCB.
> Does anybody know if there's any embedded information that can be accessed
> that indicates the serial number of the board, or is there any other way I
> can  check if the crystal and PCB are matched?
> If not, what issues could I expect from an unmatched crystal and  PCB?
> Nigel GM8PZR
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.

More information about the time-nuts mailing list