[time-nuts] Shielding a DAC line
Bob Camp
lists at rtty.us
Thu Sep 26 20:54:59 EDT 2013
Hi
I suspect that you have a ground offset between the OCXO's ground return and the DAC's ground reference. The signal *should* be DC, Shielding it won't hurt, but it really should not help much. If anything is an issue a simple R/C filter at the OCXO pin should nuke it better than coax will.
Bob
On Sep 26, 2013, at 8:09 PM, Bob Stewart <bob at evoria.net> wrote:
> I made some minor hardware changes to my GPSDO today and I see that it's locked to a new DAC voltage about 21mV higher. So, I was wondering about shielding the short run to the OCXO. I have immediately available RG-174 and I'm putting that in. But, should this be some sort of steel shelled semi-rigid coax? Maybe it's a dumb question, but I thought I'd ask.
>
> Bob - AE6RV
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