Hi Well if the Z3815 boxes are all fakes, they did a *really* good job on making up all the HP logo's and HP stickers. They even faked the right date codes for the add on stickers. They also did a very nice job with the custom cables that plug directly into everything.
Bob On Jun 5, 2013, at 6:15 PM, Mark C. Stephens <[email protected]> wrote: > Magnus, Just plug 18-60V into P10 (next to the GPS), Supposedly the input > power is steered by diodes so it is polarity insensitive. > Anyway, It's a standard connector, I am sure you have tons of them, On mine, > Pin 1 is wired to negative, Pin 2 to positive. > Pin2 is closest to the left edge looking from the front. > > Gently cut the white multi coax plastic connector shell off at the back and > the coax connectors just pull out. > Can do a seamless job with very little patience. > > You can fit certain SMB connectors as replacement. > Failing that, solder your GPS antenna feed centre conductor into b2, shield > can go in a1,a3,c1,c3. > > As a sidenote, I have seen inside those nice Z3815A boxes. > They are fakes. I know for fact they make the box in china and put an old > module in it :) > If you have one of these fake ones, your Antenna Coax will have about an inch > of unexposed coax and the ground tacked in the wrong place resulting in your > GPS being as deaf as a post. > > There are also 2 SMB on the Z3815A board itself of note supplying 1PPS and > 10Mhz un-buffered. > > Back to the rear where you have removed the connector, 3 buffered 10Mhz > outputs are on d5,d8,d11 grounds are c4-12 and e4-12. > > The Z3815A are a really lovely unit, Mine got down to 200ns hold pred. > uncertainty within a couple of days. > Unfortunately I knocked the bench power out last night accidently while > trying to reach some coax snagged around something at the back. > > Apparently, Don't touch the current batch on Ebay, they were tested by some > chap in Japan and he sold the rejects to Chinese eBay sellers. > About 50% power on, but have poor performance. > This is hearsay of course, YMMV.. > > > -marki > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Magnus Danielson > Sent: Thursday, 6 June 2013 7:23 AM > To: [email protected] > Subject: Re: [time-nuts] Z3815A pinout > > On 06/05/2013 11:16 PM, Bob Camp wrote: >> Hi >> >> There are two very different 3815's out there. One comes in a nice box >> with rational connectors on it. (They are expensive). The other one is >> the plug in card that always seems to need a good scrub down. It >> appears to have the same "stuff" but connecting to it is not easy. >> These are about 1/2 to 1/3 the price of the other ones... > > Yes, the boxed up one just has a box around the same board. > > There are variants with E1938A and those with another oscillator. > > Mine is a plug-in module, and as I was considering if I could hook it into a > VXI chassi, I realized that I was lacking that PDF. A propper manual would > also be great. > > 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. _______________________________________________ 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.
