Re: [time-nuts] DCF77 Generation
Thanks for this, the idea of using a serial port to generate the DCF77 data in WWVB3.C is most ingenious. We may actually have to do this as the braindead modem that were were using for initial development has a timing resolution of 18.461ms, so impossible to do times that are multiples of 100ms :) Oh well, if engineering was easy, everyone would do it. On 8 September 2012 00:24, Tom Van Baak t...@leapsecond.com wrote: See wwvb1.c wwvb2.c wwvb3.c under my www.leapsecond.com/tools/ directory. There's some DCF77 support as I recall. Contact me offline if you have questions. /tvb - Original Message - From: Tom Harris celephi...@gmail.com To: time-nuts@febo.com Sent: Friday, September 07, 2012 5:53 AM Subject: [time-nuts] DCF77 Generation Greetings, I have just written some code for generating DCF77 pulses given a 100ms clock interrupt and an accurate timestamp from a RTC, for a mate who has to get some imported clock movements synced up (we are in Australia which has no radio time service). I did a quick search and found very little out there from people generating their own DCF77 data, so I thought I'd ask if anyone else has ever done anything similar (and why as well). We are not transmitting, only faking the output from a DCF77 receiver. -- Dr. Celephicus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Tom Harris celephi...@gmail.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] DCF77 Generation
Greetings, I have just written some code for generating DCF77 pulses given a 100ms clock interrupt and an accurate timestamp from a RTC, for a mate who has to get some imported clock movements synced up (we are in Australia which has no radio time service). I did a quick search and found very little out there from people generating their own DCF77 data, so I thought I'd ask if anyone else has ever done anything similar (and why as well). We are not transmitting, only faking the output from a DCF77 receiver. -- Dr. Celephicus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] DCF77 Generation
See wwvb1.c wwvb2.c wwvb3.c under my www.leapsecond.com/tools/ directory. There's some DCF77 support as I recall. Contact me offline if you have questions. /tvb - Original Message - From: Tom Harris celephi...@gmail.com To: time-nuts@febo.com Sent: Friday, September 07, 2012 5:53 AM Subject: [time-nuts] DCF77 Generation Greetings, I have just written some code for generating DCF77 pulses given a 100ms clock interrupt and an accurate timestamp from a RTC, for a mate who has to get some imported clock movements synced up (we are in Australia which has no radio time service). I did a quick search and found very little out there from people generating their own DCF77 data, so I thought I'd ask if anyone else has ever done anything similar (and why as well). We are not transmitting, only faking the output from a DCF77 receiver. -- Dr. Celephicus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] DCF77 Generation
On Fri, 7 Sep 2012 22:53:50 +1000 Tom Harris celephi...@gmail.com wrote: I have just written some code for generating DCF77 pulses given a 100ms clock interrupt and an accurate timestamp from a RTC, for a mate who has to get some imported clock movements synced up (we are in Australia which has no radio time service). I did a quick search and found very little out there from people generating their own DCF77 data, so I thought I'd ask if anyone else has ever done anything similar (and why as well). We are not transmitting, only faking the output from a DCF77 receiver. Elrad (an old, discontinued german electronics magazine) had once an article on a DCF77 signal generator IIRC complete with 77.5kHz radio signal, somewhen in the second half of the 90s. If anyone is interested, i can try to track the article down in my archives. Attila Kinali -- There is no secret ingredient -- Po, Kung Fu Panda ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] DCF77 Generation
Tom Just saw your post Though I have visited your site many times over the years never ran into these. Looking forward to downloading and trying the exes out tonight. I am working on the wwvb d-psk-r and this will be handy for the am in the modulator instead of fixed streams. Thanks On Fri, Sep 7, 2012 at 2:40 PM, Attila Kinali att...@kinali.ch wrote: On Fri, 7 Sep 2012 22:53:50 +1000 Tom Harris celephi...@gmail.com wrote: I have just written some code for generating DCF77 pulses given a 100ms clock interrupt and an accurate timestamp from a RTC, for a mate who has to get some imported clock movements synced up (we are in Australia which has no radio time service). I did a quick search and found very little out there from people generating their own DCF77 data, so I thought I'd ask if anyone else has ever done anything similar (and why as well). We are not transmitting, only faking the output from a DCF77 receiver. Elrad (an old, discontinued german electronics magazine) had once an article on a DCF77 signal generator IIRC complete with 77.5kHz radio signal, somewhen in the second half of the 90s. If anyone is interested, i can try to track the article down in my archives. Attila Kinali -- There is no secret ingredient -- Po, Kung Fu Panda ___ time-nuts mailing list -- time-nuts@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@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
