[time-nuts] Z3812 Diag port data? RE: time-nuts Digest, Vol 124, Issue 26

Bob Camp kb8tq at n1k.org
Sun Nov 2 21:20:27 EST 2014


So at least there is one way communications from the GPS box to the slave box. 

Bidirectional com would be a bit complex given the lack of UART’s on the pc board. I’d bet it just runs through a standard set of messages on the GPS and watches the results. The way to quickly prove I’m wrong would be to issue a command to the GPS from the slave that it must respond to. Something like go into survey mode or set the location to xxx yyy zzz.  I’ve certainly been wrong before. 

I suppose they could do dual source TTL com directly at the GPS module level. I’d think that would drive the GPS unit a bit nuts when the slave started switching things around….


> On Nov 2, 2014, at 4:16 PM, n2lym <n2lym at optonline.net> wrote:
> Yes the diagnostic port on the slave unit diaplay's gps data just like the Z3811. Therefore there must be serial data being exchanged on the 15 pin interconnect.
> Mike
> Message: 5
> Date: Sun, 2 Nov 2014 15:58:20 -0500
> From: GandalfG8 at aol.com
> To: time-nuts at febo.com
> Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A,
> Z3810A, Z3811A, Z3812...
> Message-ID: <868c5.58494d20.4187f4ec at aol.com>
> Content-Type: text/plain; charset="UTF-8"
> Just another thought though, does the diagnostic port on the slave also
> communicate with SatStat etc?
> That would imply at least a transfer of serial data in one  direction, even
> if not for the control functions.
> Regards
> Nigel
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