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

[paul swed]

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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>
>