Re: [time-nuts] Strange DCF77 master clock data

2012-12-10 Thread mike cook
Le 10/12/2012 13:44, Chris Howard a écrit : If it were me, I'd suspect that my window of bits is off to the left or right by one bit. The old "first bit is called zero" problem. And the relationship between 7-> 3 and 5-> 1 makes me wonder. Chris On 12/10/2012 5:00 AM, Tom Harris wrote: I

Re: [time-nuts] Strange DCF77 master clock data

2012-12-10 Thread Chris Howard
If it were me, I'd suspect that my window of bits is off to the left or right by one bit. The old "first bit is called zero" problem. And the relationship between 7-> 3 and 5-> 1 makes me wonder. Chris On 12/10/2012 5:00 AM, Tom Harris wrote: > I am logging the data from this strange master

Re: [time-nuts] Strange DCF77 master clock data

2012-12-10 Thread Tom Harris
That's the funny thing, the parity bit is correct for the value of DOW, just that the DOW value is wrong. On 9 December 2012 23:27, Azelio Boriani wrote: > Is the parity bit P3 consistent? It protects the day of the month and that > of the week. > > On Sun, Dec 9, 2012 at 1:24 PM, mike cook wro

Re: [time-nuts] Strange DCF77 master clock data

2012-12-10 Thread Tom Harris
I am logging the data from this strange master clock, and the none of the bits 42 through 44 are stuck. Good idea, though. I have just checked tonight, and the DOW is indicating as 5 (Friday), despite it only being Monday. Good idea though. On 9 December 2012 23:24, mike cook wrote: > Le 09/12/

Re: [time-nuts] Strange DCF77 master clock data

2012-12-09 Thread Azelio Boriani
Is the parity bit P3 consistent? It protects the day of the month and that of the week. On Sun, Dec 9, 2012 at 1:24 PM, mike cook wrote: > Le 09/12/2012 11:28, Tom Harris a écrit : > > Greetings Time Nuts. >> >> Time related, but unusually so: >> >> I am examining the DCF77 (see http://en.wikip

Re: [time-nuts] Strange DCF77 master clock data

2012-12-09 Thread mike cook
Le 09/12/2012 11:28, Tom Harris a écrit : Greetings Time Nuts. Time related, but unusually so: I am examining the DCF77 (see http://en.wikipedia.org/wiki/DCF77 for a refresher) data output from a master clock intended to drive a series of slave clocks operated from 24V DC, interrupted by 100ms

[time-nuts] Strange DCF77 master clock data

2012-12-09 Thread Tom Harris
Greetings Time Nuts. Time related, but unusually so: I am examining the DCF77 (see http://en.wikipedia.org/wiki/DCF77 for a refresher) data output from a master clock intended to drive a series of slave clocks operated from 24V DC, interrupted by 100ms or 200ms pulses to signal '0'& '1' on the da