[time-nuts] Z3801 Replacement GPS Receiver Card

[Azelio Boriani]

Are you sure that the GPS unit is defective? Can you test it alone?

On Thu, Sep 13, 2012 at 10:44 PM, Mike S <mikes at flatsurface.com> wrote:

> On 9/13/2012 2:00 PM, Chris Albertson wrote:
>
>> On Thu, Sep 13, 2012 at 10:53 AM, Mike S <mikes at flatsurface.com> wrote:
>>
>>> Search for "oncore vp" (which is what a z3801a needs), and you won't find
>>> ANY, at any price.
>>>
>>>  Really?  It can't use the newer UT?  I thought the UT is identical
>> except
>> for better performance.
>>
>
> Yes, really. The z3801a starts by sending a @@Ca (self test) command. None
> of the later models have that, so it fails. When they brought the self test
> back with the M12s, it was changed to @@Ia. Then it sends @@Cg (go to
> Position fix mode). They don't have that, either, it was changed to @@At on
> the UT/GT/SL, @@Gd on M12s. There are probably others, but that's more than
> enough to make anything later than a VP fail.
>
>
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