[time-nuts] Truetime dc 468 goes sat rcvr simulator basics working

[paul swed]

Just back from a weeks long road trip and indeed the goes clock is still on
time. Though it may be slightly ahead by a part of a second visually. I
don't think I looked this close when I started the test. However I just
fired up wwv and see it is matching the time ticks. So this has been a very
good test that checking the gps time and such didn't actually mess up the
GOES data stream.
So my next steps will be to document this and then share out to the group.
Speculate a week or so.
Regards
Paul WB8TSL

On Thu, Dec 9, 2010 at 8:34 PM, paul swed <paulswedb at gmail.com> wrote:

> OK I see the list bounced the email.
> Here is just the truetime pix
>
>
> The truetime dc468 is indeed working.
> Though the SX28 is just about out of everything. Like program space and
> variables space
> Need to dig a bit to see if there is a trick or two for more space.
> Anyhow it is locked to GPS on start and currently I have it update every 10
> minutes.
> Just trying to see if something goes crazy.
>
> Two pixs attached.
> One the SX28 processor very simple. The thing plugged into the left is the
> programmer. The other is the operating TrueTime DC468.
>
> I am not using the days so the days area represents the day of the month
> now. Today is the 10th of December UTC.
> Need to lets this bake in for a couple of weeks.
> Regards
> Paul
> WB8TSL
>
> On Thu, Dec 9, 2010 at 8:30 PM, paul swed <paulswedb at gmail.com> wrote:
>
>> The truetime dc468 is indeed working.
>> Though the SX28 is just about out of everything. Like program space and
>> variables space
>> Need to dig a bit to see if there is a trick or two for more space.
>> Anyhow it is locked to GPS on start and currently I have it update every
>> 10 minutes.
>> Just trying to see if something goes crazy.
>>
>> Two pixs attached.
>> One the SX28 processor very simple. The thing plugged into the left is the
>> programmer. The other is the operating TrueTime DC468.
>>
>> I am not using the days so the days area represents the day of the month
>> now. Today is the 10th of December UTC.
>> Need to lets this bake in for a couple of weeks.
>> Regards
>> Paul
>> WB8TSL
>>
>>
>> On Mon, Dec 6, 2010 at 10:04 PM, paul swed <paulswedb at gmail.com> wrote:
>>
>>> Well indeed progress the dc468 is now sync'ing to gps on start.
>>> Have a dirty fudge factor to get the seconds exactly synced. Don't like
>>> it but does work.
>>> Did try to use hex as a month indicator and that did not work.
>>> As an example Nov would be A and Dec B. But looking at the driver ckts
>>> its doesn't look like anything stops you from doing it. I have seen the
>>> clock put out a-d in the digits when I had the info feeding them wrong.
>>> Need to tinker with that a bit more. I just don't find 100s of days to be
>>> useful though easily implemented now that I can get the date.
>>> Regards
>>> Paul.
>>>
>>>
>>> On Mon, Dec 6, 2010 at 4:38 PM, paul swed <paulswedb at gmail.com> wrote:
>>>
>>>> I am using a hocky puck unit
>>>>
>>>>
>>>> On Mon, Dec 6, 2010 at 4:35 PM, Bill Hawkins <bill at iaxs.net> wrote:
>>>>
>>>>> There are also a lot of GPS hockey pucks that send the NMEA codes
>>>>> to map software in a laptop that are rapidly becoming obsolete.
>>>>> NMEA is adequate for the 468 display.
>>>>>
>>>>> Have three of them, to go with three NIB (except for the manual)
>>>>> DC 468 receivers. Don't need any of them.
>>>>>
>>>>> Bill Hawkins
>>>>>
>>>>>
>>>>> -----Original Message-----
>>>>> From: paul swed
>>>>> Sent: Monday, December 06, 2010 3:13 PM
>>>>> To: Discussion of precise time and frequency measurement
>>>>> Subject: Re: [time-nuts] Truetime dc 468 goes sat rcvr simulator basics
>>>>> working
>>>>>
>>>>> Justin,
>>>>> I might think quite a few time Nuts have these.
>>>>> So making progress have build a gps sat message decoder for the GPRMC
>>>>> sentence that gives time and data. I believe most GPS units put that
>>>>> sentence out. Have it decoding time and next is date. Maybe tonight.
>>>>> Then I have to glue this code into the simulator to set the clock.
>>>>> Next will be a update subroutine which is quite tricky as to how the
>>>>> updates
>>>>> done.
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
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>>>>> and follow the instructions there.
>>>>>
>>>>
>>>>
>>>
>>
>