[time-nuts] Z3801 Replacement GPS Receiver Card

Hui Zhang ba6it at 163.com
Sun Sep 16 13:38:44 UTC 2012


I just bought a second-hand Z3801A, it also had a error message when self test - GPS Rcv error, and I saw a red LED on main board on. I want test it alone but I don't know GPS board's pin define, can someone tell me? Thanks.


Hui


At 2012-09-16 21:20:26,"Azelio Boriani" <azelio.boriani at screen.it> wrote:
>Anyway, are you sure that the GPS unit is faulty? Can you test it alone?
>The unit is responsive on the serial port? Is the Z3801A sending commands?
>Can you verify with a 'scope on the serial line if there is any signal?
>
>On Sun, Sep 16, 2012 at 2:54 PM, Mike S <mikes at flatsurface.com> wrote:
>
>> On 9/15/2012 2:11 PM, paul swed wrote:
>>
>>> Then respond back with whatever the response might be and then simply pass
>>> through in both direction whatever comes next.
>>> Could an updated rcvr be used.
>>> Is this init command really the only gotcha?
>>>
>>
>> It's more than just the init command. The z3801a also sends @@Ca, @@Cg,
>> @@Ab, @@Ah, @@Aj, @@Ak, @@Al, @@An, @@Ar, @@Av, @@Ax, @@Ay, @@AB, @@AC,
>> @@AD, @@Ba, @@Bc, @@Bk, @@Cg, @@At, and @@Bn, none of which are available
>> on an M12 (which would be the logical target if you're going to the trouble
>> of an adapter), so would need to be converted to other commands, and the
>> correct response returned. In addition, the response to the @@Bb command
>> (Visible sat status) would need modification.
>>
>>
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