Re: [time-nuts] T-Bolt Companion
On Nov 5, 2011, at 7:44 PM, Kevin Rosenberg wrote: Hi David, I got it, thanks! Heh, wrong reply address. Sorry! Kevin ___ 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] Low-cost GPS distribution using DVB-T parts?
Folks, I wonder whether anyone has tried GPS RF signal distribution using low-cost TV parts? For example, this amplifier: http://www.amazon.co.uk/gp/product/B001AI7OOQ is rated up to 2.3 GHz and could be driven from the +5 V available on the antenna socket of some units. Used after a puck antenna, its noise factor would not be critical, nor would the 50-ohm/75-ohm impedance mismatch. You could then add a 2-way or 4-way satellite TV splitter to feed multiple GPS units (taking care of the DC paths and various connector formats, of course). Just a thought Cheers, David -- SatSignal software - quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ 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] Low-cost GPS distribution using DVB-T parts?
Worked for me when I was driving two Thunderbolts from the same antenna using a splitter. Operation without the amp in the line was marginal. With the amp in the line things were fine. The amp is a Perfect Vision in-line map 950-2400 MHz 20db sold for use with satellite dishes. -- Chuck Forsberg WA7KGX N2469R 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 a FS700 useable in the USA?
On 11/06/2011 12:25 AM, Poul-Henning Kamp wrote: In messagef3429597-8c62-464a-82fa-c321b51fe...@flatironresearch.com, Scott H arris writes: I picked up a SRS FS700 LORAN-C frequency standard cheap and is seem to be functional, but I don't have the active antenna. I live about 20 miles west of Boulder, CO. I seriously doubt you will get any kind of signal that the FS700 or any other LORAN-C receiver can use. Your nearest station may be one of the Russian Chayka stations. PS: But I'm in the market for a cheap FS700, if you want to get rid of it again, but we need to find a sensible way to ship it to Denmark... I would too be in the market for one, I'm in Sweden so I too get to see some LORAN-C. However, I recall there being some issue with the FS700 and support for European chains due to the chain delay settings. Cheers, Magnus ___ 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] Low-cost GPS distribution using DVB-T parts?
In my company we use home satellite/TV splitters to distribute the GPS antenna over tens of GPSDO units. Usually we split multiple times one single antenna without much problems. Yes, at times the satellite count is low but this is considered a useful test. On Sun, Nov 6, 2011 at 11:54 AM, Chuck Forsberg WA7KGX N2469R c...@omen.comwrote: Worked for me when I was driving two Thunderbolts from the same antenna using a splitter. Operation without the amp in the line was marginal. With the amp in the line things were fine. The amp is a Perfect Vision in-line map 950-2400 MHz 20db sold for use with satellite dishes. -- Chuck Forsberg WA7KGX N2469R 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. ___ 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 a FS700 useable in the USA?
Yes, I have seen that some old Loran receivers (like the Apollo 612B) have fixed preprogrammed chain delays (GRIs) and others (like Raynav 520) can be set with a variable delay. On Sun, Nov 6, 2011 at 12:47 PM, Magnus Danielson mag...@rubidium.dyndns.org wrote: On 11/06/2011 12:25 AM, Poul-Henning Kamp wrote: In messagef3429597-8c62-464a-82fa-c321b51fe...@flatironresearch.com, Scott H arris writes: I picked up a SRS FS700 LORAN-C frequency standard cheap and is seem to be functional, but I don't have the active antenna. I live about 20 miles west of Boulder, CO. I seriously doubt you will get any kind of signal that the FS700 or any other LORAN-C receiver can use. Your nearest station may be one of the Russian Chayka stations. PS: But I'm in the market for a cheap FS700, if you want to get rid of it again, but we need to find a sensible way to ship it to Denmark... I would too be in the market for one, I'm in Sweden so I too get to see some LORAN-C. However, I recall there being some issue with the FS700 and support for European chains due to the chain delay settings. Cheers, Magnus ___ 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] Low-cost GPS distribution using DVB-T parts?
My thanks to Nigel, Azelio, and Chuck for confirming the feasibility of this. At least I haven't spent too much time re-inventing the wheel. I now have some bits on order, including yes more adapters for those wretched F-connectors! Cheers, David -- SatSignal software - quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ 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] Serial to Excel utility.
Sorry folks for the slightly OT post. Does anybody know of a utility that will import and parse the serial bit stream from a GPS and put values into a couple of cells in an Excel spreadsheet? Regards, Nic VK2KXN / VK5ZAT ___ 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] Serial to Excel utility.
On 11/06/2011 07:48 PM, Nic McLean wrote: Sorry folks for the slightly OT post. Does anybody know of a utility that will import and parse the serial bit stream from a GPS and put values into a couple of cells in an Excel spreadsheet? Would not importing of comma-separated format be the easiest path? It should be trivial to have NMEA format stripped of wrappers such that the remaining result would be accepted as a comma separated list which import neatly into Excell or similar tool. Cheers, Magnus ___ 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] Serial to Excel utility.
Try poking around here: http://www.windmillsoft.com/index.html They have a variety of serial apps and much info on importing to excel. There might just be something here that is close to what you want. cheers, Graham On Sun, 2011-11-06 at 19:59 +0100, Magnus Danielson wrote: On 11/06/2011 07:48 PM, Nic McLean wrote: Sorry folks for the slightly OT post. Does anybody know of a utility that will import and parse the serial bit stream from a GPS and put values into a couple of cells in an Excel spreadsheet? Would not importing of comma-separated format be the easiest path? It should be trivial to have NMEA format stripped of wrappers such that the remaining result would be accepted as a comma separated list which import neatly into Excell or similar tool. Cheers, Magnus ___ 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] R: Re: Precisione GPS based led clock
yes, I am working with for a timestamp on a FireWire Camera (MARLIN CAMERA) Unfortunately no free software can timestamp frame withouth data loss. My camera is unable to carry out an atuomatic timestamp (it is and old version). Thank you for info Paolo Martini Messaggio originale Da: david-tay...@blueyonder.co.uk Data: 3-nov-2011 12.02 A: time-nuts@febo.com Ogg: Re: [time-nuts] Precisione GPS based led clock Dear all I am an amateur astronomer working in the field of minor planet occultation. To arrange a precise reference time I am looking for a 1/100 sec LED dispaly clock GPS based. (LED is usefull for night vision) My idea is to use a ebay used master clock such as ThunderBolt GPS disciplined clock to drive a timecode display. Particulary I wish to realize a PIC based LED clock to display hour min sec and use the 10 MHz reference to arrange an 1/10 and 1/100 sec disaply. Can anyone help me in finding schemes or any more flexible idea? thanks A small Netbook PC locked to a good local NTP server should be able to achieve that. Your local NTP server can be locked to GPS (ideally) or to the Internet. GPS devices: http://www.satsignal.eu/ntp/FreeBSD-GPS-PPS.htm http://www.satsignal.eu/ntp/Sure-GPS.htm The PC's screen refresh rate would be marginal for 1/00s, though. Perhaps 1/20s is more realistic. If 1/10s is good enough, there are applications like Emerald Time for your iPad/iPhone: http://emeraldsequoia.com/et/index.html Are you actually trying to timestamp a video recording or light-level reading? Or time pressing a button? Cheers, David -- SatSignal software - quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ 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.
[time-nuts] Lady Heather Switch AMU and dBc
What command do I use to switch displayed signal strength between AMU and dBc in Lady Heather? Thanks, Jim W4TVI ___ 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] Serial to Excel utility.
The data, as is comes out of the GPS is already in a form that Excel can read. Just tell Excel that it is coma separated values, On Sun, Nov 6, 2011 at 10:48 AM, Nic McLean mclea...@bigpond.com wrote: Sorry folks for the slightly OT post. Does anybody know of a utility that will import and parse the serial bit stream from a GPS and put values into a couple of cells in an Excel spreadsheet? Regards, Nic VK2KXN / VK5ZAT ___ 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.
Re: [time-nuts] R: Re: Precisione GPS based led clock
paolo.mart...@alice.it said: yes, I am working with for a timestamp on a FireWire Camera (MARLIN CAMERA) Unfortunately no free software can timestamp frame withouth data loss. My camera is unable to carry out an atuomatic timestamp (it is and old version). Will it work if you just use a single LED connected to the PPS signal from the GPS? The idea is to count frames from the first frame where you can see the LED. That assumes you can get within a second using other means. Some PPS pulses are only 10 microseconds wide. If you have one of those, you will have to use a pulse stretcher. What is the timing like on the shutter of modern digital cameras? I assume the time it is open is adjusted to adapt to the light level. Suppose I'm running at 100 frames per second (a handy round number). That's 10 ms per frame. Is the readout double-buffered so I can have the shutter open for most of the 10 ms and also have 10 ms to read out the frame? If the shutter is open for most of the frame time, you can probably get sub-frame timing by measuring the intensity of the LED. -- These are my opinions, not necessarily my employer's. I hate spam. ___ 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] BBC on Leap Seconds
FYI: A series of articles, the first 3 from 4 November 2011. http://www.bbc.co.uk/search/news/leap_second Individual articles from above: . 4 November 2011 * The end of the 'leap second'? http://news.bbc.co.uk/today/hi/today/newsid_9631000/9631441.stm Next year, the international community will vote on whether to abolish the leap second. * Changes to the world's time scale debated http://www.bbc.co.uk/news/science-environment-15546124 Science Environment / 4 November 2011 And the main issue up for debate is the leap second - and whether we should abolish it. The leap second came into existence in 1972. It is added. * Science explained: What is a leap second? http://www.bbc.co.uk/news/science-environment-15563170 4 November 2011 Science reporter Rebecca Morelle explains what a leap second is - and what would happen if we got rid of them. John Allen K1AE ___ 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] Serial to Excel utility.
I have done this using hyperterm on an older PC. It produced a comma delimited file that wasn't too hard to parse into columns and then import into excel. You need to make sure there is a CR/LF after each sentence. I haven't explored terminal programs on a more modern PC but I'm sure they are do-able. Regards, Morris (VK3DOC) Date: Mon, 7 Nov 2011 05:48:09 +1100 From: Nic McLean mclea...@bigpond.com To: time-nuts@febo.com Subject: [time-nuts] Serial to Excel utility. Sorry folks for the slightly OT post. Does anybody know of a utility that will import and parse the serial bit stream from a GPS and put values into a couple of cells in an Excel spreadsheet? Regards, Nic VK2KXN / VK5ZAT ___ 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] Serial to Excel utility.
NP, http://freecode.com/projects/np might be a good starting point. Nic McLean wrote: Sorry folks for the slightly OT post. Does anybody know of a utility that will import and parse the serial bit stream from a GPS and put values into a couple of cells in an Excel spreadsheet? Regards, Nic VK2KXN / VK5ZAT ___ 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] Serial to Excel utility.
I've used http://www.instantexe.com/ which is a scripting language. Don Thomas Valerio NP, http://freecode.com/projects/np might be a good starting point. Nic McLean wrote: Sorry folks for the slightly OT post. Does anybody know of a utility that will import and parse the serial bit stream from a GPS and put values into a couple of cells in an Excel spreadsheet? Regards, Nic VK2KXN / VK5ZAT ___ 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. -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. R. Bacon If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.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] Serial to Excel utility.
oops, also forgot to mention Robot Basicc, a freebie that features easy to use serial port functions. http://www.robotbasic.org/ Don Thomas Valerio NP, http://freecode.com/projects/np might be a good starting point. Nic McLean wrote: Sorry folks for the slightly OT post. Does anybody know of a utility that will import and parse the serial bit stream from a GPS and put values into a couple of cells in an Excel spreadsheet? Regards, Nic VK2KXN / VK5ZAT ___ 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. -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. R. Bacon If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.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] Serial to Excel utility.
Thanks Graham, Nic Try poking around here: http://www.windmillsoft.com/index.html They have a variety of serial apps and much info on importing to excel. There might just be something here that is close to what you want. cheers, Graham ___ 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] Raven Industries GPS in-line L1 Amplifier
eBay auction for Raven Industries in-line GPS L1 amplifier Item number 370437343397 $25 plus shipping Raven Industries Inline GPS Amplifier Model LA-12-1575-100N http://www.navtechgps.com/Downloads/LA-12-L1L2.pdf Female N Connectors on each end I've ordered one; he's got around ten remaining. 73, Bob K6RTM ___ 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] Raven Industries GPS in-line L1 Amplifier
Just be careful on overloading the front end of a GPS receiver. A typical (what ever that is anymore) GPS receiver has about a maximum of a 15 dB power bandwidth. If overloading occurs (minor), it might swamp the strong signals. If you already have an active antenna the extra 12 dB of the in-line amp may effectively jam all the signals. That said, thanks for the heads up and I believe I'll get one just to try :). Michael / K7HIL On Sun, Nov 6, 2011 at 11:01 PM, k6...@comcast.net wrote: eBay auction for Raven Industries in-line GPS L1 amplifier Item number 370437343397 $25 plus shipping Raven Industries Inline GPS Amplifier Model LA-12-1575-100N http://www.navtechgps.com/Downloads/LA-12-L1L2.pdf Female N Connectors on each end I've ordered one; he's got around ten remaining. 73, Bob K6RTM ___ 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] Precisione GPS based led clock
A straightforward solution would be to use a string of divide-by-ten and divide-by-six BCD counters (HC390). First divide the 10 MHz output from a GPS receiver down to 100 Hz and feed that to the input of a divide-by-100 counter for the 1/100 seconds display, then to a divide-by-60 for the seconds and so on. The BCD counters would feed a series of eight CD4511 or equivalent decoders as previously suggested. The 1 PPS output from the GPS, properly stretched, could be used to reset the 1/100 s counters and to clock the seconds counter. Pretty straightforward and no display multiplexing, but a lot of wiring. Getting the time from the GPS to the clock circuit would be a little more complicated, and would almost certainly require some kind of microprocessor or PIC. One solution is to synchronize the clock to the GPS once a day at local midnight using the reset inputs to the counters. This would be relatively simple to do with a PIC, I would think, and would still leave the clock section alone, without the need for complicated wiring or deciphering of the display. I designed a similar clock, although without the 1/100 s digits display and using an OCXO rather than a GPS receiver. In the end I used an MK50250N clock chip I purchased on eBay, same chip I used back in 1974 to build a small alarm clock. This clock chip uses a multiplexed display, which might not work with a video recorder or camera. -- Flemming Larsen Fra: paolo.mart...@alice.it paolo.mart...@alice.it yes, I am working with for a timestamp on a FireWire Camera (MARLIN CAMERA) Unfortunately no free software can timestamp frame withouth data loss. My camera is unable to carry out an atuomatic timestamp (it is and old version). Thank you for info Paolo Martini ___ 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] Serial to Excel utility
Try this or datawedge http://www.taltech.com/products/winwedge Sent from my iPod ___ 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] Raven Industries GPS in-line L1 Amplifier
Just be careful on overloading the front end of a GPS receiver. A typical (what ever that is anymore) GPS receiver has about a maximum of a 15 dB power bandwidth. If overloading occurs (minor), it might swamp the strong signals. If you already have an active antenna the extra 12 dB of the in-line amp may effectively jam all the signals. That said, thanks for the heads up and I believe I'll get one just to try :). Michael / K7HIL No need to worry about overloading here - the ** won't send to the UK. David -- SatSignal software - quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ 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.
