While not a true modification, my Z3801A has an external time/date display.
-Dave ----- Original Message ----- From: "Magnus Danielson" <[email protected]> To: [email protected] Sent: Saturday, March 31, 2012 5:10:10 AM Subject: Re: [time-nuts] HP Z3801A Sale On 03/31/2012 08:11 AM, Hal Murray wrote: > >> There really is nothing much to this "modification." The Z3801A is already >> designed to easily work on either interface, but most units are configured >> for RS-422 as the default. It takes perhaps a half-hour to remove a few >> zero-ohm SMD resistors and solder in a header strip. The simple procedure >> is described and illustrated here:<www.ad6a.com/Z3801A.html> > > You don't need the header strip. There are empty slots waiting for some of > the 0-ohm jumpers you have to remove. > > I think they are the three to the right of the circle in figure-13 of the > above URL. You can work out which is which by following the traces or using > an ohm-meter. > > Here is another URL in case you want a second opinion: > http://support.ntp.org/bin/view/Support/Z3801AReceiverModifications > > The modification is trivial and recommended. Has anyone figured out the other modifications possible? There's a second FPGA to drop in, I just haven't bothered to try that. There seems to be a secondary serial port available. Cheers, Magnus _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
