[time-nuts] 58503A does not track

claude.ff at aliceadsl.fr claude.ff at aliceadsl.fr
Fri Feb 5 15:35:08 EST 2016



----- Mail original -----
> De: "Mike Cook" <michael.cook at sfr.fr>
> À: "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
> Envoyé: Jeudi 28 Janvier 2016 11:21:45
> Objet: Re: [time-nuts] 58503A does not track
> 
> 
> > Le 28 janv. 2016 à 07:37, claude.ff at aliceadsl.fr 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


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