----- Mail original ----- > De: "Mike Cook" <[email protected]> > À: "Discussion of precise time and frequency measurement" <[email protected]> > Envoyé: Jeudi 28 Janvier 2016 11:21:45 > Objet: Re: [time-nuts] 58503A does not track > > > > Le 28 janv. 2016 à 07:37, [email protected] a écrit : > > > > Thanks for your reply > > > > I don't think it's a computer problem because I can see the GPS is > > not locked when I compare the 10 MHz output with a Rubidium. > > By the way, I don't use software but the screen command under > > Linux. > > > > Maybe the motorola bord is dead, I will investigate this : I have > > to send commands directly to the board, as suggested by someone > > offlist. > > > > > > The board in the GPSDO is a Motorola 84D43579M03 . The same as this > > one : > > http://www.ebay.com/itm/HP-Z3801A-Z3805A-GPS-Module-Motorola-Oncore-P-N-84D43579M03-/161594138402?nma=true&si=jnWr5n2KQf1WL6JylF%252BMgtIr1%252FM%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557 > > > > > > Do you think it can be replaced by this one : > > http://www.ebay.com/itm/Z3801A-Z3805A-GPS-Receiver-VP-oncore-B4121Z1116-/281670591394?hash=item4194e023a2 > > > > > > I think you can replace your receiver with this. Some Z3801As ( which > are pretty much the Telco versions of the 58503A) came with the > 84D43579M03 part , but mine has a B412P1115 . I think you should be > safe with the replacement. I have a Motorola document which says > that the B parts with firmware 8.1 and later have "8 channel code > added" with some related commands, so I guess your part is a 6 > channel model. In a command reference manual from Synergy Systems, > Randy Warner states > > “house numbered” receivers with total jibberish for model numbers > have worked their way into the surplus market, but under the skin > they are probably pretty standard parts. “If it walks like a VP, > talks like a VP, and acts like a VP, it’s probably some variation of > a VP.....” > > I can’t see any indication in the command guide that 8 channel > receivers will not accept the 6 channel command set however that > might be an issue at set up . > > My advice is suck it and see. The VP above is cheap enough . I am > going to order one if I can get a shipping price to France and there > are any left. > >
Hello, A little follow-up : I've bougth the card in the link above and it works perfectly with my 58503A. Thanks to you both for the advices. Claude _______________________________________________ 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.
