Re: [time-nuts] Heads up: Mark C. Stephens...
On 05/08/13 11:42, MailLists wrote: Good luck delisting a DNSBL listed IP (block) from those crusaders... Back some time there was a piss contest between some of those blacklists on which one would blacklist the whole internet faster. In the mean time different security providers bought up some of those rabid blacklists to power their antispam offerings, usually bundled with a security appliance. If you get caught in their web, you'll have a tough time to get delisted, usually denied with some puerile pretext, from obtuse criteria up to pure blackmail. In fairness, SORBS and Spamhaus are some of the better candidates, and ISP-bundled mail servers typically are _full_ of spam because their customers get viruses that proceed to use their email accounts for spamming all the time. If you want to get your email delivered reliably and receive email reliably, run your own mailserver or get someone who knows what they're doing to run one for you. -- Cheers, James Harrison ___ 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] NTP Clock suggestions?
On 28/05/13 16:40, Chris Albertson wrote: Next simplest is to use a small LCD computer monitor or a cheap Android tablet. For a local student radio station I used some £8 LED matrix boards (display modules + drivers). Two of them daisy-chained was plenty for very readable time, four got you time and date. I had it driven by an Arduino from a PC but on something like the Beaglebone Black or possibly even the RPi, it should be trivial to drive from the PC directly. There are -loads- of modules/boards like these out there! Never got around to measuring accuracy at the sub-second side of things but it was wholly accurate enough for radio timings. -- Cheers, James Harrison ___ 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] RTS
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Seeems to be differential GPS? http://en.wikipedia.org/wiki/Networked_Transport_of_RTCM_via_Internet_Protocol Cheers, James Harrison On 04/04/2013 07:32, gary wrote: Can anyone translate this to English. OK, it is English, but you know what I mean. It is supposed to be some new time service. http://rts.igs.org/access/ ___ 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. -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.17 (MingW32) iEYEARECAAYFAlFdH/AACgkQ22kkGnnJQAxdFgCgs7mQJ5WVAZsY8ihcmXQdScOR /BUAoJz2Zd1vlW0zmrKrRTN44LClKh9j =26KZ -END PGP SIGNATURE- ___ 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] Time shown as two horizontal bars
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 02/04/2013 04:31, Jim Lux wrote: On 4/1/13 3:06 PM, Bill Hawkins wrote: Looking for a long, thin horizontal clock display for use above or below a flat screen TV. Tried searching for bar clock and got a lot of useless hits. If you're bulding it.. Arduino is your friend.. there's tons of LED displays of all shapes and sizes that people have written interface libraries for the Arduino.. +1 for Arduino for quickly hacking stuff like this together - http://www.bliptronics.com/ do some great LED modules that are pre-wired individually addressable serial controlled RGB LEDs. There's plenty of realtime clocks available for Arduino (the DS1302 and DS1307 are common, eg https://www.sparkfun.com/products/99 ), and if you go with the Arduino Ethernet you can just talk NTP to your local time server: http://arduino.cc/en/Tutorial/UdpNtpClient . Very convenient! Cheers, James Harrison -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.17 (MingW32) iEYEARECAAYFAlFaVLEACgkQ22kkGnnJQAyJVACeNeai8Fn9lTAlANJhFkarq3Ug Yo0An10vfKHHd1GGEr00YKBeYVBGyOT2 =sPJ9 -END PGP SIGNATURE- ___ 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] Win XP and NIST time
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 24/03/2013 06:27, David J Taylor wrote: I'm surprised by how many time-nuts are not using the reference NTP port for Windows, considering the many advantages it has over the simple (non conformant and non-manageable) client built into Windows). I made some notes here: http://www.satsignal.eu/ntp/setup.html You can then use the same management tools (ntpq) and configuration expertise you have on you UNIX, Linux, FreeBSD etc. systems. Serial-port PPS devices are supported, allowing you to make stratum-1 clocks on Windows with performances down to the 100-200 microsecond level: PCs Alta Bacchus Feenix and Stamsund http://www.satsignal.eu/mrtg/performance_ntp.php and with Windows-8, network synced PCs with offsets typically below 250 microseconds even over Wi-Fi sync, PC Bergen: http://www.satsignal.eu/mrtg/performance_ntp.php Cheers, David +1 to this - on the Windows boxes I used to have running at a radio station (including playout machines, which needed good time synchronization) we ran Meinberg's NTPd port on all the machines and had no issues. That's with XP under a support contract, though - I suspect some people without said contracts via work etc will be hitting issues. http://windows.microsoft.com/en-GB/windows/products/lifecycle#section_2 suggests end of extended support April 2014, though - so only just over a year until even businesses can't get updates. Happily migrated everything to Win7 or Linux now so no more headaches on that front here. If you've not looked into 7 and are on XP still, I do recommend at least considering a migration - 7 is stable now and will be supported at least until 2020, but I'd wager longer than that the way Windows 8 appears to be crashing and burning in the market. Cheers, James -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.17 (MingW32) iEYEARECAAYFAlFO180ACgkQ22kkGnnJQAwfxwCfcZ9SJOE86Iw3J21e2yfKWGH9 upkAniM5ga/4e+96/mEGKVjpx4LMoSb+ =1d/u -END PGP SIGNATURE- ___ 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] Win XP and NIST Time
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 23/03/2013 14:50, Jim Lux wrote: It wouldn't surprise me that XP doesn't have an accurate table of this, since that would be one of the casualties of being past support EOL although the KB entries I link below indicate that they ARE still providing updates for XP. There are a lot of places where timezones can go wrong because it's all stored in the registry and there have been updates over the years that are incremental and others that purport to be monolithic, etc. XP is still up to date with timezone changes as far as I am aware but you will need to ensure all (including optional) updates are installed, and that may only be possible with an enterprise support contract now. If all else fails, you can disable automatic timezone updates with the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation DisableAutoDaylightTimeSet REG_DWORD (1 = disable daylight-savings adjustment, 0 or not set = enable adjustment) Not sure if third party software can keep you in the right zone then, but I'd imagine so. Really though the correct fix is to upgrade to Windows 7. It's stable, works well, and will be supported for years to come; though if you want long term stability/updates you're better off looking into Linux systems. Cheers, James Harrison -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.17 (MingW32) iEYEARECAAYFAlFN3QIACgkQ22kkGnnJQAwXcQCfecSf69PAckTtmjDMCrNB/lWr Fk0AnjQpynN3/uK+qKbYlX4njLNnZBk8 =ziSq -END PGP SIGNATURE- ___ 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] Possibly off topic - Jitter on Ethernet over power adapters
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 My gut feeling would be that overall noise/power/length of run etc is going to be a significant factor, too - ie, longer runs or noisier power environments will have an impact. As with all things sensitive, it's best to isolate things - I have yet to see any ethernet over powerline installations that couldn't be done with 30m of category 5 cable and 10 minutes with a drill (or lots of internal cable pins). Given that, my instinct would be to replace the ethernet over power boxes with real cables. Another upshot: You'll make any radio hams nearby very happy. Cheers, James On 10/02/2013 19:00, David wrote: The poster is asking about ethernet over power line and not power over ethernet. As you point out, the later should have zero effect on ethernet latency. There are several ethernet over power standards. Latency will include a bridge in each adapter, the effects of a noisy uncontrolled AC power line when ARQ (automatic repeat query) is used, and the TDMA or CSMA media access control system. I suspect varying power line conditions will have the largest effect because any jitter from the media access control system will be multiplied by ARQ. On Sun, 10 Feb 2013 08:14:38 -0800, Chris Albertson albertson.ch...@gmail.com wrote: THose power over Ethernet devices work with analog signals and don't evn look at the data packets. All they do is place a DC bias on the twisted pair.Ethernet is always transformer coupled so your routers, switches and computers never see DC. What is your NTP server using for a reference clock? I'd suspect that is the problem. If the reference is an Internet pool server than a few mS is about what you should expect. If using GPS then look to see if you have a good signal from enough satellites. But those POE boxes don't mess with the data packets, or at least the are not designed to do that. If one is broken it could be adding noise to the line. Broken hardware can do anything. On Sun, Feb 10, 2013 at 3:18 AM, Rob Kimberley robkimber...@btinternet.com wrote: I'm not sure if this is the best place to ask the question, but does anyone have experience of using Ethernet over power line adapters? I have an outside office, and my router is in the house plugged into the phone master socket. I have used two Ethernet over power adapters, one at the router and one in the office here to get internet access. The output of the adapter then goes to a multi-port hub to give me Ethernet to all my office devices including two Meinberg NTP servers. I've noticed large jitter readings on Meinberg's NTP monitor program. Can be as low as 2ms, but much higher (50mS +), and at this point NTP goes haywire. Not sure if it is the physical set up or something else. Any comments appreciated. Thanks. Rob ___ 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. -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.17 (MingW32) iEYEARECAAYFAlEX9ncACgkQ22kkGnnJQAwcRACcC+nnF/iN4sPZ3S25FX4y7WRS VSEAn2fHeSA/4Ri6ZjJgdUek/y6xizGC =wM2v -END PGP SIGNATURE- ___ 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] Thunderbolt Monitor
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Absolutely - however, I suspect the MSP430 might be a little too small. I'd be looking at something like a Raspberry Pi and a serially attached screen. Adafruit do some lovely boards like these: http://www.adafruit.com/products/1115 It's not $5 but it's not exactly exorbitant. Or just use a Pi and a HDMI capable TV if you have one spare. Cheers, James Harrison On 23/01/2013 19:55, Chris Albertson wrote: You can't compare the size of a Windows binary to a uP RAM. If you look inside the .exe file you see that 90% of it is dealing with the Windows OS. The actual computations are very, very small and don't use even half the 16KB Flash. On Wed, Jan 23, 2013 at 10:10 AM, Bob Camp li...@rtty.us wrote: Hi Heathdos.exe 123 KB Heather.exe 572 KB Server.exe 176 KB (each would be plus what ever they pull from DLL's and the OS) Ti LaunchPad MSP-EXP430G2 - MSP 430 version ($4.30): MSP-430G2553 Microcontroller: 16 KB flash 512 B RAM MSP-430G2452 Microcontroller: 8 KB flash 256 B RAM I suspect you would get about 5% of it into a MSP430. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Chris Albertson Sent: Wednesday, January 23, 2013 11:44 AM To: Major L. McGee III; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Thunderbolt Monitor I was looking into porting much of LH into an Arduino or TI Launch Pad (msp430) And then a display would be web based. But then I decided to go back to grad school and there went any free time. But I think that is that way to go. The TB is best kept in some light-out closet and who wants to stand of a step stool to read an LCD when a web interface could put a better display on your smart phone or computer I did just buy a TI Launchpad. For $4.30 shipping included I could not resist but I have in mind a MUCH smaller project On Wed, Jan 23, 2013 at 8:31 AM, Major L. McGee III maj...@sc.rr.com wrote: I have been following this on the list for a while now and was curious if anyone is actively working on a open source monitor. I see the one made by Adam VK4GHZ is no longer being sold. This got me back on track for wanting to make one of my own. I have been using either tbmon or lady heather but always have issues with a usb to serial converter when I start the computer. It will go haywire and cause it to freeze and make the mouse malfunction. Once I disconnect the converter (I have tried other makes as well) it works fine. Usually I can reconnect the converter and things will work again. What I would like to do is make a 2 or 4 line lcd readout to display various info. I really liked VK4GHZ's page type selector knob. I can see that being very useful. On a youtube video by n6vmo said the thunderbolt used a ASCII Hex and needs to be converted by using 64 bit floating point math. So are any of you currently working on this or have decided to quit and have any information to share? ___ 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. -- Chris Albertson Redondo Beach, California ___ 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. -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.17 (MingW32) iEYEARECAAYFAlEASkoACgkQ22kkGnnJQAzUCgCfT5V3oRBoq/FfHmv6dZSDet2k fuUAnRZO3g6eU+V8Zn1ubupYDbNeywef =GHLi -END PGP SIGNATURE- ___ 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] An embedded NTP server
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 02/01/2013 19:25, Chris Albertson wrote: For an NTP server I'd go with something that can run an OS and the NTP reverence implementation. ARM (and others) can do that. This is exactly what I've done using the Raspberry Pi (Broadcom ARM SOC running Linux) and a GPS module with the PPS kernel hook for Linux GPIO. Still a beginner/aspiring time-nut so I'm not sure on accuracy (PLL offset jitter suggests ~5-10ms worst-case but I've not looked much into measuring it yet), but it's an improvement on internet NTP at least. (Brief writeup here: http://www.talkunafraid.co.uk/2012/12/the-ntpi-accurate-time-with-a-raspberry-pi-and-venus638flpx/ - - be gentle, it's my first 'real' timing project!) James -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.17 (MingW32) iEYEARECAAYFAlDkjUcACgkQ22kkGnnJQAzbXQCfU6nLKnJ7lPFLGcAZysxaJUuC POsAn3YKaX3IAhk4MbqGnGUNJOSv7oTa =d3dr -END PGP SIGNATURE- ___ 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] An embedded NTP server
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 02/01/2013 20:05, David J Taylor wrote: James, You might be interested in my write-up: http://www.satsignal.eu/ntp/Raspberry-Pi-NTP.html and its performance: http://www.satsignal.eu/mrtg/performance_ntp.php I was playing with RasPi-1 today to see whether a different (navigation) GPS receiver or system configuration would make any difference to the oscillatory nature of the offset, hence the big step around 11:00 when the card was restarted after an hour's power down. RasPi-2 with a timing GPS receiver looks better, and it should have an identical configuration to RasPi-1 (except that the USB port is being sent data). Cheers, David Interesting stuff indeed - the timing receiver certainly looks much more stable, which is to be expected. I'm not seeing quite as much stability on my Pi/setup - http://i.imgur.com/6L8ur.png is the munin-measured kernel offset for the last day. I've only been running it for a few days but I'd have thought the clock loop should've stabilized a bit more than it has at present. Could be that this particular GPS receiver isn't managing very well at all to give particularly precise PPS pulses, which is possible given it's a navigational receiver. The datasheet specifies a 60nsec accuracy but it's unclear if that relates to the 1PPS output. Once this one's been running for a few more days I should have some more interesting graphs; I'm getting one of my home boxes set up with Graphite so I can push more detailed statistics and information to that from the RPi about NTP etc and get a better feel for what's going on. Cheers, James -BEGIN PGP SIGNATURE- Version: GnuPG v2.0.17 (MingW32) iEYEARECAAYFAlDkl9IACgkQ22kkGnnJQAyjxQCfUYma1e8MuRcWD8Ldk0IRHOKy lnQAoK8+Qr0DcADVwFJi0XtGvRC9hPx9 =5JMB -END PGP SIGNATURE- ___ 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.
