[time-nuts] KS-24361 REF-0 standalone

[D W]

Yes, I'm hoping that it just wants a dummy string to say GPS is ok, and doesn't actually use any information in it. If that's the case, code can be developed for PIC and AVR that will work for just about anyone, using a ~$1 chip.

Even if the string does need to contain real GPS info, it should still be quite easy to do.

A while back I wrote some code to parse the serial string from a Jupiter-T and display the information on a 4 line LCD display. It worked very nicely but I never did anything useful with it. I think I'll take Bob's notes and incorporate the REF-0. That would make for a very compact setup.

Dan

> On Aug 7, 2015, at 2:06 PM, paul swed <paulswedb at gmail.com> wrote:
> 
> Looking forward to the notes.
> Yes it could be fairly simple if what ref 0 wants is a string that
> essentially says the system is fixed with 3 d accuracy. Perhaps after that
> the ref 0 makes no checks other then the string keeps coming with the
> correct quality. Not to push a particular proc but any of the low end ones
> will do that stunt very easily.
> That would be pretty sweet.
> Paul
> WB8TSL
> 
>> On Fri, Aug 7, 2015 at 10:13 AM, Bob Camp <kb8tq at n1k.org> wrote:
>> 
>> Hi
>> 
>> Ok, I will write something up and post it here. It will probably take a
>> few days
>> to get it all into a form that answers most of the questions.
>> 
>> What you will need:
>> 
>> 1) A working REF-0
>> 2) A PIC or other micro to get things going
>> 3) A GPS with a PPS output (any will do)
>> 4) Code specific to your GPS and the needs of the REF-0
>> 
>> Since the Oncore needs to be set up each time it’s booted, there is no real
>> advantage to using one. You still need an MCU in the mix.
>> 
>> More to follow.
>> 
>> Bob
>> 
>>> On Aug 7, 2015, at 5:24 AM, Graham <planophore at aei.ca> wrote:
>>> 
>>> Bob,
>>> 
>>> I would like that information too please and thank you.
>>> 
>>> I have a pair that is working quite well and I also have a second REF-0
>> that I want to start testing but just haven't got round to it yet to figure
>> out what is needed.
>>> 
>>> cheers, Graham ve3gtc
>>> 
>>> 
>>>> On 2015-08-07 02:39, Bob Camp wrote:
>>>> Hi
>>>> 
>>>> You need to get the Oncore running with the correct position locked in
>> and spitting out the right strings.
>>>> That’s all done by the CPU in the REF-1 unit. The REF-0 simply grabs
>> the data off of the string
>>>> as it comes by.
>>>> 
>>>> I’ll see if I can dig out the information and send it to you off list.
>> It’s buried around here somewhere.
>>>> 
>>>> Bob
>>>> 
>>>>> On Aug 6, 2015, at 10:02 PM, Edesio Costa e Silva <
>> time-nuts at tardis.net.br> wrote:
>>>>> 
>>>>> Thanks.
>>>>> 
>>>>> I have some Motorola Oncore available.
>>>>> 
>>>>> Can you detail this "fairly simple manipulation of the signal lines"?
>>>>> 
>>>>> Regards,
>>>>> 
>>>>> Edésio
>>>>> 
>>>>>> On Thu, Aug 06, 2015 at 09:57:20PM -0400, Bob Camp wrote:
>>>>>> Hi
>>>>>> 
>>>>>> People got a bit ???excited??? about the level of KS box discussions.
>> All of the work decoding
>>>>>> the 15 pin connector and how to drive the REF-0 was taken off list.
>>>>>> 
>>>>>> Simple answer:
>>>>>> 
>>>>>> Yes you can run a REF-0 by it???s self. It needs a dummy string that
>> looks like the output
>>>>>> of a Motorola Oncore to feed it and some fairly simple manipulation
>> of the signal lines.
>>>>>> It will then quite happily discipline to the pps you feed it.
>>>>>> 
>>>>>> Bob
>>>>>> 
>>>>>>> On Aug 6, 2015, at 7:27 PM, Edesio Costa e Silva <
>> time-nuts at tardis.net.br> wrote:
>>>>>>> 
>>>>>>> Hello Fellows!
>>>>>>> 
>>>>>>> Had anyone managed to run the KS-24361 REF-0, the one without GPS,
>> as a
>>>>>>> standalone unit? If so, can you provide some links on how to
>> configure it?
>>>>>>> 
>>>>>>> The reason to try this is cost. The REF-0 unit costs USD 25 + USD
>> 52.30
>>>>>>> (shipping to Brazil) and I have to pay the same amount as custom
>> taxes.
>>>>>>> 
>>>>>>> Right now the REF-0/REF-1 pair would be too expensive.
>>>>>>> 
>>>>>>> Regards,
>>>>>>> 
>>>>>>> Edésio
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