[time-nuts] Z3801 Replacement GPS Receiver Card

Bob Camp lists at rtty.us
Sat Sep 15 18:17:36 UTC 2012


Hi

The only way to find out is to actually do it. Right now the init string keeps you from "seeing" any further into the process.

Bob

On Sep 15, 2012, at 2:11 PM, paul swed <paulswedb at gmail.com> wrote:

> I also have a z3801 so perhaps I will face the same issue at some point.
> The question I have is the following.
> If a uproc is inserted between the rcvr and the chassis to intercept the
> init command.
> 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?
> Not trying to do some complete re-emulation. But what I outline above would
> not be difficult.
> I would use whats called an SXB chip. cheap simple...
> Regards
> Paul
> WB8TSL
> 
> On Thu, Sep 13, 2012 at 5:08 PM, Azelio Boriani <azelio.boriani at screen.it>wrote:
> 
>> 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.
>>> 
>>> 
>>> _______________________________________________
>>> time-nuts mailing list -- time-nuts at febo.com
>>> To unsubscribe, go to
>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>> and follow the instructions there.
>>> 
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>> 
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.





More information about the Time-nuts_lists.febo.com mailing list