Re: [time-nuts] Is there anything wrong with DCF77?
I've got nothing running at the moment that decodes or locks to DCF77, and obviously can't comment on the possibility of localised interference, but here on the west coast of Scotland the signal certainly looks and sounds just as it always does. It's a nice clean signal peaking at approx -77dBm as opposed to MSF on 60KHz peaking at -50dBm, which is much as I would expectd given that MSF is very much closer. regards Nigel GM8PZR In a message dated 01/01/2013 12:40:47 GMT Standard Time, anth...@atkielski.com writes: For the past several days (now thirty hours straight), none of my radio-synchronized clocks has been able to synchronize with DCF77. Is there a problem with the transmitter, or maybe a geomagnetic storm or something that could explain it? I've been looked at the transmitter Web site and searching for news and information on any disturbances that would affect reception, but I haven't found anything. I'm about 500 km from the station. The only thing I have that will sync is my wristwatch, and it will only do it if I stand outside in an open area. -- Anthony ___ 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.
Re: [time-nuts] Is there anything wrong with DCF77?
Here in north Italy (QTH locator JN45UJ) the DCF77 reception is regular. On Tue, Jan 1, 2013 at 1:40 PM, Anthony G. Atkielski anth...@atkielski.comwrote: For the past several days (now thirty hours straight), none of my radio-synchronized clocks has been able to synchronize with DCF77. Is there a problem with the transmitter, or maybe a geomagnetic storm or something that could explain it? I've been looked at the transmitter Web site and searching for news and information on any disturbances that would affect reception, but I haven't found anything. I'm about 500 km from the station. The only thing I have that will sync is my wristwatch, and it will only do it if I stand outside in an open area. -- Anthony ___ 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.
Re: [time-nuts] Is there anything wrong with DCF77?
Hi Anthony, is there any possibility that you have a source of local interference that started up in your home or area? From time to time, I have had everything from power line arcing noise to a new computer power supply that was generating a high level of interference blocking signals on different frequencies. If you have a spectrum analyzer available that will cover the frequency range of DCF77, it may not hurt to look around and see what you can find. George -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Anthony G. Atkielski Sent: Tuesday, January 01, 2013 7:40 AM To: time-nuts@febo.com Subject: [time-nuts] Is there anything wrong with DCF77? For the past several days (now thirty hours straight), none of my radio-synchronized clocks has been able to synchronize with DCF77. Is there a problem with the transmitter, or maybe a geomagnetic storm or something that could explain it? I've been looked at the transmitter Web site and searching for news and information on any disturbances that would affect reception, but I haven't found anything. I'm about 500 km from the station. The only thing I have that will sync is my wristwatch, and it will only do it if I stand outside in an open area. -- Anthony ___ 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.
Re: [time-nuts] Is there anything wrong with DCF77?
In message 01cde828$6a8e29d0$3faa7d70$@com, George Race writes: Hi Anthony, is there any possibility that you have a source of local interference that started up in your home or area? For DCF77 a very typical source of trouble is old CRT-based televisions or monitors, since 15625 Hz * 5 = 78125 Hz Reception looks good here in .dk -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ 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] Is there anything wrong with DCF77?
Hi Anthony, is there any possibility that you have a source of local interference that started up in your home or area? Maybe, but I'm not sure where it would come from. It's been like this for days, and today there is no reception by any of the clocks at all. If just one clock failed to receive, I'd look at the clock, but four at once means there's something wrong with reception. There are computers on my desk, but they've been there for years. But who knows what's happening in apartments around me. If you have a spectrum analyzer available that will cover the frequency range of DCF77, it may not hurt to look around and see what you can find. I wish! Santa didn't bring me one of those, unfortunately. There's one clock that often has trouble synchronizing, irrespective of its position. Two others usually synchronize okay, again irrespective of position, although they are usually near windows, anyway. The watch seems to synchronize very reliably as long as it's near the window. But right now nothing is synchronizing. Thank goodness I have NTP on the server or I wouldn't have exact time! -- Anthony ___ 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] Is there anything wrong with DCF77?
For DCF77 a very typical source of trouble is old CRT-based televisions or monitors, since 15625 Hz * 5 = 78125 Hz I suppose someone nearby could have received a collector's-item Trinitron for Christmas. What about Wi-Fi, cell phones, and such? They are way far away in frequency, but I'm not a radio engineer. Anything high-tech that could interfere? -- Anthony ___ 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] Is there anything wrong with DCF77?
On 01/01/2013 09:54 AM, Anthony G. Atkielski wrote: For DCF77 a very typical source of trouble is old CRT-based televisions or monitors, since 15625 Hz * 5 = 78125 Hz I suppose someone nearby could have received a collector's-item Trinitron for Christmas. What about Wi-Fi, cell phones, and such? They are way far away in frequency, but I'm not a radio engineer. Anything high-tech that could interfere? -- Anthony ___ 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. It could be a newly installed CFL or one whose filtering has just failed. Or any switching power supply for that matter. -- Chuck Forsberg WA7KGX c...@omen.com www.omen.com Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc The High Reliability Software 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 ___ 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] Is there anything wrong with DCF77?
Hi The first thing to think about is what did I get for Christmas?. If it runs 24 hours a day, it might be the source of the problem. Just about anything *could* have a switching power supply in it these days. It could be as silly as the plug in the wall charger for a cell phone. Bob On Jan 1, 2013, at 12:54 PM, Anthony G. Atkielski anth...@atkielski.com wrote: For DCF77 a very typical source of trouble is old CRT-based televisions or monitors, since 15625 Hz * 5 = 78125 Hz I suppose someone nearby could have received a collector's-item Trinitron for Christmas. What about Wi-Fi, cell phones, and such? They are way far away in frequency, but I'm not a radio engineer. Anything high-tech that could interfere? -- Anthony ___ 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.
Re: [time-nuts] Is there anything wrong with DCF77?
In message 1991305643.20130101185...@atkielski.com, Anthony G. Atkielski wr ites: What about Wi-Fi, cell phones, and such? They are way far away in frequency, but I'm not a radio engineer. Anything high-tech that could interfere? Far more likely are switch-mode power-supplies, either in equipment or as black block to plug in the outlet. Many LED light devices, including some X-mas lights use a switchmode supply. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ 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] Is there anything wrong with DCF77?
Hi Could be that neighbor with the 1,000,000 light Christmas display …. Bob On Jan 1, 2013, at 2:14 PM, Poul-Henning Kamp p...@phk.freebsd.dk wrote: In message 1991305643.20130101185...@atkielski.com, Anthony G. Atkielski wr ites: What about Wi-Fi, cell phones, and such? They are way far away in frequency, but I'm not a radio engineer. Anything high-tech that could interfere? Far more likely are switch-mode power-supplies, either in equipment or as black block to plug in the outlet. Many LED light devices, including some X-mas lights use a switchmode supply. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ 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.
Re: [time-nuts] Is there anything wrong with DCF77?
Could be that neighbor with the 1,000,000 light Christmas display . Hmm ... that sounds like a likely culprit. There are some Christmas lights nearby. We'll see if the problem disappears with the lights. Good ideas, thanks Bob and Poul. -- Anthony ___ 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] Is there anything wrong with DCF77?
If you can look at the output of a DCF77 demodulator you should see a nice clean set of 100ms/200ms pulses every second. All you need is a CRO, or you could just use a LED to indicate the state. On 2 January 2013 01:00, George Race geo...@mrrace.com wrote: Hi Anthony, is there any possibility that you have a source of local interference that started up in your home or area? From time to time, I have had everything from power line arcing noise to a new computer power supply that was generating a high level of interference blocking signals on different frequencies. If you have a spectrum analyzer available that will cover the frequency range of DCF77, it may not hurt to look around and see what you can find. George -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Anthony G. Atkielski Sent: Tuesday, January 01, 2013 7:40 AM To: time-nuts@febo.com Subject: [time-nuts] Is there anything wrong with DCF77? For the past several days (now thirty hours straight), none of my radio-synchronized clocks has been able to synchronize with DCF77. Is there a problem with the transmitter, or maybe a geomagnetic storm or something that could explain it? I've been looked at the transmitter Web site and searching for news and information on any disturbances that would affect reception, but I haven't found anything. I'm about 500 km from the station. The only thing I have that will sync is my wristwatch, and it will only do it if I stand outside in an open area. -- Anthony ___ 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. -- 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.
Re: [time-nuts] Is there anything wrong with DCF77?
On 1/1/2013 9:42 PM, Tom Harris wrote: If you can look at the output of a DCF77 demodulator you should see a nice clean set of 100ms/200ms pulses every second. All you need is a CRO, or you could just use a LED to indicate the state. This is how DCF77 looks, when received with an SDR capable of displaying spectrum and waterfall. Captured just minutes ago. [1]https://dl.dropbox.com/u/15089947/dcf77_a.gif 73 Alberto I2PHD References 1. https://dl.dropbox.com/u/15089947/dcf77_a.gif ___ 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] Is there anything wrong with DCF77?
On 1/1/2013 9:42 PM, Tom Harris wrote: If you can look at the output of a DCF77 demodulator you should see a nice clean set of 100ms/200ms pulses every second. All you need is a CRO, or you could just use a LED to indicate the state. This is how DCF77 looks, when received with an SDR capable of displaying spectrum and waterfall. Captured just minutes ago. [1]https://dl.dropbox.com/u/15089947/dcf77_a.gif 73 Alberto I2PHD Unfortunately I don't have any tools or anything, just the clocks. Hopefully whoever is causing the interference will stop once the holidays are over (I don't think it's me, as nothing has changed inside the apartment). Even if I could find the source of the interference, I wouldn't necessarily be able to force my neighbors to stop whatever they are doing that causes it. -- Anthony ___ 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.
