Re: [time-nuts] usno tours
Thanks, figured someone who reads this list may be connected there... not like precision timekeeping is a huge community. Eric On Sun, Mar 17, 2013 at 2:53 PM, Magnus Danielson mag...@rubidium.dyndns.org wrote: On 03/17/2013 10:47 PM, Eric Fort wrote: Would anyone on this list know the present status of tours at usno DC (for may2013) with the present state of congress. I'll be in DC the first week of May and would really like to see the lab and learn more about astronomical and atomic timekeeping activities there. I would ask USNO this question. I too would love the same oppertunity. 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.
[time-nuts] usno tours
Would anyone on this list know the present status of tours at usno DC (for may2013) with the present state of congress. I'll be in DC the first week of May and would really like to see the lab and learn more about astronomical and atomic timekeeping activities there. Eric Fort ___ 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] What time is it anyway?
Hopefully the following questions will begin some discussion leading to a better understanding of What time is and where it comes from in a civil, legal, and everyday living context. What time is it? Why is that the correct time? How does one know what the correct time is? Is the proper and correct time reference codified as statue? (thinking of the US) Where? ...and maybe even where does time come from? since it seems to me that it can not simultaniously be 2 times at a single moment (using the same timescale) then how can one tell which clock (if any) is correct? Eric ___ 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] OT: Verilog/VHDL discussion list created...
On Tue, Apr 14, 2009 at 12:40 PM, Magnus Danielson mag...@rubidium.dyndns.org wrote: I have my own email-lists on my own server... if someone asked me to set the list up, I would just do it. Cheers, Magnus AND On Tue, Apr 14, 2009 at 3:50 PM, John Miles jmi...@pop.net wrote: What objections are there to Yahoo Groups? I don't have a way to get NNTP traffic in my email inbox, nor would I want it if I could. -- john, KE5FX AND On Tue, Apr 14, 2009 at 3:56 PM, John Miles jmi...@pop.net wrote: ...I prefer email lists to Usenet, and I'm the one who started the group. :-P -- john, KE5FX My objection to yahoo groups is they require you to be a member of yahoo giving out all mannor of personal information just so you can access the group archives using some funky interface they provide. I tolerate participating in a few yahoo groups only because I can get limited functionality (no access to archives) by just using the list subscribe address in a standard mannor. I too run my own servers, and it is much prefered when a list is hosted with mailman or majordomo where full access to the archives is offered. With list hosting cheap to free, full webhosting with email list management in the $60-$75/yr range, and a virtual private server with full root access available for $120/yr available as options I'd be hard pressed to choose yahoo. Eric, AF6EP ___ 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] looking for data on Magellan 10 channel OEM GPS board circa 1994-1998
I'm looking for data on what appears to be a magellan oem GPS reciever which I removed from an older magellan aviation gps with moving map display (unit was circa 1998). The gps module I removed has Magellan systems corp, Copyright 1994 10 channel OEM silkscreened on the top side and a sticker on the bottom which says 23-80019-000 REV. L S/N 004925 right above 20-80011-000 REV. B etched on the board as part of the artwork. Anyone have any idea where I may find enough data on this board to give it new life in another project? Google was unable to find anything and Magellan Support was so abysmnal that I will no just think twice about buying or specifying anything magellan in the future `I would more than likely just refuse to have any part in the use or implimentation. Google had no results and Magellan lack of support dept. was worse. any help you can offer in finding data and using this board in much appreciated. Thanks, Eric ___ 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] radio clocks
Does anyone know of a (WWVB) radio controlled clock that meets all the necessary points and many if not most of the optional points listed in the compliance checklist in section 10 of NIST Special Publication 960-14, available for reference here: http://tf.nist.gov/general/pdf/1976.pdf (compliance checklist begins on pdf page 47/64) Thanks, Eric ___ 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] CPU frequency and NTP crazyness.
the bios lists them as power saving or green features. they will not reference speed directly. try disabling anything that remotely implies power saving. The best solution I know of though is to use linux as an ntp server and set a fixed processor speed directly. -Eric On 1/5/08, Ryan [EMAIL PROTECTED] wrote: I got a chance to look at the bios today and saw no features that would change the cpu speed as some type of power save feature. I did discover that Seti doesn't start processing for a little while after a restart so I had to switch my imperfect solution to my offset problems to use [EMAIL PROTECTED] On 1/4/08, Ryan [EMAIL PROTECTED] wrote: I had an interesting result. I downloaded RMclock and with [EMAIL PROTECTED] running the CPU was at full load and speed. I stopped Seti and the load dropped to almost nothing but the speed stayed the same. After about a minute the offset and jitter readings went through the roof. My offsets were above half a second! There was no reduction in anything CPU related while this happened. When I get access to the machine I'll take a look at the bios settings to make sure I have the power settings in an optimal configuration. ___ 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] CPU frequency and NTP crazyness.
Two things come to mind here, first most bios have a group of power management features which are configurable, make sure those features are set properly (disabled). second, Your OS should have power management options as well. The features in windows seem a bit limited for directly addressing cpu speed but under Linux the processor speed is directly settable. The top 6 hits herehttp://www.google.com/search?hl=enclient=firefox-arls=org.mozilla%253Aen-US%253Aofficialhs=8tWq=disable+cpu+frequency+scalingbtnG=Searchall discuss this and give rather direct solutions. Eric On 1/4/08, Ryan [EMAIL PROTECTED] wrote: I moved my NTP server to my old Athlon XP desktop running Windows XP and quickly noticed the effect the CPU power save feature had on NTP. Once the CPU started ramping down from 2GHz to wherever it lands when it's done the NTP offsets would hit over a second. I installed [EMAIL PROTECTED] and [EMAIL PROTECTED] to keep the processor frequency at the maximum speed and everything has been just peachy with NTP. My question is this, does anyone have a way to switch off the power save feature the CPU is using so I don't have to run my machine full tilt? Thanks all! Ryan ___ 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] need recomendation for a portable 10mhz reference oscilator
I'm looking for a fairly basic, relatively simple 10 Mhz PORTABLE reference (probably quartz based) with enough stability over a period of a week of outdoor temp extremes to keep a 47Ghz transmitter locked within 100hz while mountaintop contesting. Suggestions are appreciated. something that is small and ran off 12 volts dc (car battery) would be a definite plus. Thanks, Eric ___ 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] More details on IEEE Spectrum clock competition
over what durration will the clocks accuracy be measured? (seconds, minutes, hours, days, months, (years)? accuracy to be measured before disciplining with GPS, WWVB. calibration should be within the grasp of a layman Could some clarification be given here? I'm thinking that the clock could be self calibrating say automatically or by user button press but this presents a chicken and egg problem in light of the quotes above. Many of the designs I've seen previously keep an internal memory that tracks and allows compensation for parameters such as drift, aging rate, and temp coefficient updating these variables when connected to a known better reference. in this way the accuracy improves with time. while a layman could calibrate this type of clock quite easily (or would not need to as the clock would calibrate itself) any calibration pretty much by definition is a comparison to a better reference (wwvb, gps, hydrogen maser, rubidium, cesium beam, etc.) so how do you expect calibration to be accomplished without, use of a better standard? would such a device be allowed to remember and store calibration factors during its initial calibration or would this fall into the category of discipline? I would say that the initial determination and programming of calibration factors (which will vary among devices) is calibration, after which it becomes discipline as the routine continues to run. What's your interpretation? Eric On Nov 30, 2007 6:43 AM, [EMAIL PROTECTED] wrote: A number of people have asked for more details on IEEE Spectrum's digital clock competition, so we've formulated the following list. Throughout, the idea is to build a clock that an ordinary person would want to use, in an ordinary home. That's why we want a display that can be read with ease from across a room. Operating environment and other specs for IEEE Spectrum's Digital Clock Competition: --between 10 and 50 degrees C --between 0 and 100 percent relative humidity --with seven-segment LED display, no smaller than 0.56 inches --no limit on power --calibration should be within the grasp of a layman --lacking an oscilloscope here in the office, we will check accuracy against a WWVB or GPS signal (other suggestions--even volunteers to help in the judging--are welcome) --parts to be available from any of the big distributors (RadioShack, Mouser, DigiKey, Maplin, etc.) or, in sufficient quantities (100s, say) from a surplus store Philip E. Ross Senior editor IEEE Spectrum Magazine 212 419 7562 http://www.spectrum.ieee.org ___ 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] windows xp 'internet time'
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY I recently noticed windows telling me that it was November 30, 2007yet It's still october! I clicked the icon to manually update the date and time [from pool.ntp.org] (date and time properties, internet time tab, update now) and the time changed by a second or 2 but the date remained Friday, November 30 (today is tuesday, october 30) does the date not update as well via NTP? what's likely wrong here? Thanks Eric ___ 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] windows xp 'internet time'
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY probably a week or 2. what likely happened is that at some point I mistakenly reset the month but I thought telling it to manually sync should fix that an it did not. the date remained in errror. Eric On 10/30/07, Jason Rabel [EMAIL PROTECTED] wrote: I thought Windows will give you an error unless your date matches the actual date? Interesting how your machine could get so far off, and maintain an incorrect date even after you synced. How long has your PC been running without being shut down / rebooted? Jason I recently noticed windows telling me that it was November 30, 2007yet It's still october! I clicked the icon to manually update the date and time [from pool.ntp.org] (date and time properties, internet time tab, update now) and the time changed by a second or 2 but the date remained Friday, November 30 (today is tuesday, october 30) does the date not update as well via NTP? what's likely wrong here? Thanks Eric ___ 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] OT: Need HP 7475A Drivers manuals
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY The manual has been scanned already and is available at http://www.hpmuseum.net/exhibit.php?hwdoc=74 Eric (I didn't contribute it, Joseph Gray from this list pointed me there in a post that also went to the list I believe) On 10/27/07, Didier Juges [EMAIL PROTECTED] wrote: ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Jeffrey, It would be greatly appreciated by many if you could carefully scan the manual and upload it before you sell it so that it would benefit many rather than one. Thanks in advance, Didier KO4BB -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jeffrey Pawlan Sent: Friday, October 26, 2007 10:41 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] OT: Need HP 7475A Drivers manuals I have the ORIGINAL HP7475 Graphics Plotter SERVICE MANUAL dated June 1990. It has complete schematics, disassembly, adjustments, parts lists. I also have a rather extensive supply of new HP short pen style plotter pens and refillable accessories, a list 26 items long. Anyone interested? I would rather sell them to friends here than on ebay. 73, Jeffrey Pawlan WA6KBL ___ 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] OT: Need HP 7475A Drivers for XP or Linux
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY I really appreciate the Detailed reply, Thanks. Your web page has an error though that prevents downloading the roland drivers. the link to them is file:///C:/Documents%20and%20Settings/neonjohn/My%20Documents/My%20Webs/Neon_John/Neon/Misc/Roland_RWD- 028.zip since I'm not on your local machine I have no access to files on your C: drive, atleast referenced this way. Could the link be updated or could you just email the drivers. Thanks, I'll let you know how it goes. Eric On 10/20/07, Neon John [EMAIL PROTECTED] wrote: On Sat, 20 Oct 2007 18:57:27 -0700, Eric Fort [EMAIL PROTECTED] wrote: There seems to be a wealth of knowlege here about keeping older HP hardware running. Would anyone in this group have experience using a 7475A plotter under XP or Linux to plot test data or drawings. I'd like to get mine running again. No problem. I use an E-size HP engineering plotter to make neon patterns and to plot schematics. I have it working quite well under XP. These old plotters are HPGL or HPGL-1 - same thing. They are NOT compatible with HPGL-2. An additional complication that arises with some software packages is that there are two common implementations of HPGL. The HP standard one has the origin at the corner of the paper and all movement instructions are positive intergers. The other one has the origin in the center of the page and movement instructions involve positive and negative intergers. They are not compatible. If you get a plot but it's only about a quarter of the drawing then the driver is outputting a center-zero file to a corner-zero plotter. Microsoft dropped HPGL support, what little there was, from XP. No problem. Sign vinyl cutters almost all use HPGL and are still in production. Unfortunately many use center-page-origin HPGL. Fortunately Roland does not. Therefore Roland drivers will work with HP plotters. Unfortunately, Roland apparently has taken down their windows plotter drivers. Fortunately I haven't :-) You can get the drivers from my site here: http://www.neon-john.com/Neon/Misc/misc_home.htm Bottom of the page. ( a google click or two would be appreciated :-) You'll have to experiment a bit to find out which Roland plotter most closely approximates your plotter. This is a universal solution that will let just about any program send vector images to the plotter via windows printing. Just for kicks sometime, print a text file from WordPad and watch what happens. The plotter carefully draws each and every letter. If, for some reason, this doesn't work, there is another method that I use with CorelDraw and any other package that can export the drawing in HPGL format. Simply choose export, select HPGL and select a place to store the file. Then use Hyperterm or any other terminal package capable of sending out an ASCII file and copy the HPGL file to the COM port that the plotter is connected to. This will be generic HPGL and won't have any plotter setup info in it. OTOH, usually none is needed. My HP plotter and/or Hyperterm (can't remember which is the culprit) does NOT use Xon/Xoff handshaking. Therefore hardware handshaking MUST be enabled and wired in the interface. Additionally, several pins must be jumpered together to make things work. When you get that far, drop me a note and I'll go dig out my adapter and give you the wiring. This handshaking requirement applies to the XP drivers too. A few notes about using a pen plotter with Windows and Corel in particular. Set ALL lines to hairline. Use the ^A key to select all and then set the line width to hairline. The reason is that Corel and/or the driver is so dumb that instead of making a wide line by making several long strokes with the pen offset a little each time, it scribbles it in like a first grader coloring. That is, if the line is to be 24 points wide, the pin is driven to scribble back and forth on 24 point strokes. It draws effectively about an inch a minute like that, if it doesn't wear a hole in the paper. Set your actual line widths by using various width pens. Set, say, a 4 point wide line to pen 1, an 8 point line to pen 2, etc. Also, convert all the colors to black. For some reason the translation from color to pen number doesn't work too well. If you need the output to be in color then move each color in the drawing to a different layer and then assign the appropriate pen to each layer. Sometimes text comes out looking better if you convert to curves before plotting. Rots o Ruck finding pens. They're available but hard to find and very expensive. I'm fortunate to have acquired several Rapidograph drafting pen to HP pen adapters so that I can use india ink to draw with. India ink on mylar is still THE kick-ass way to make PCB masks if you don't have a photo-plotter handy. I bought out
Re: [time-nuts] OT: Need HP 7475A Drivers for XP or Linux
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Thanks, Got the archive successfully. I thought I had done similar and failed but it's here now and what a thrill to watch this old plotter draw each and every character of a word pad document on the page. I now know the following about what works and what does not: the HPGL/2 driver listed in windows does not work at all, Don't even bother trying with the 7475A Winlink has pay drivers available and the orientation out of wordpad is proper (They know the page is sideways and prints (draws) acordingly). The free download leaves a watermark on all drawings until registered. The roland drivers work perfectly as well, with the exception of page registration. This is likely something that can be taken care of by software settings. . Now I just need pens and paper...(I have one offer for this, more sources are welcome) Thanks to all, Eric Eric On 10/21/07, Joseph Gray [EMAIL PROTECTED] wrote: Until he fixes that URL, just paste the filename into the page URL after Misc/. It worked for me. - Original Message - From: Eric Fort [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, October 21, 2007 3:41 AM Subject: Re: [time-nuts] OT: Need HP 7475A Drivers for XP or Linux I really appreciate the Detailed reply, Thanks. Your web page has an error though that prevents downloading the roland drivers. the link to them is file:///C:/Documents%20and%20Settings/neonjohn/My%20Documents/My%20Webs/Neon_John/Neon/Misc/Roland_RWD- 028.zip since I'm not on your local machine I have no access to files on your C: drive, atleast referenced this way. Could the link be updated or could you just email the drivers. Thanks, I'll let you know how it goes. Eric On 10/20/07, Neon John [EMAIL PROTECTED] wrote: On Sat, 20 Oct 2007 18:57:27 -0700, Eric Fort [EMAIL PROTECTED] wrote: There seems to be a wealth of knowlege here about keeping older HP hardware running. Would anyone in this group have experience using a 7475A plotter under XP or Linux to plot test data or drawings. I'd like to get mine running again. No problem. I use an E-size HP engineering plotter to make neon patterns and to plot schematics. I have it working quite well under XP. These old plotters are HPGL or HPGL-1 - same thing. They are NOT compatible with HPGL-2. An additional complication that arises with some software packages is that there are two common implementations of HPGL. The HP standard one has the origin at the corner of the paper and all movement instructions are positive intergers. The other one has the origin in the center of the page and movement instructions involve positive and negative intergers. They are not compatible. If you get a plot but it's only about a quarter of the drawing then the driver is outputting a center-zero file to a corner-zero plotter. Microsoft dropped HPGL support, what little there was, from XP. No problem. Sign vinyl cutters almost all use HPGL and are still in production. Unfortunately many use center-page-origin HPGL. Fortunately Roland does not. Therefore Roland drivers will work with HP plotters. Unfortunately, Roland apparently has taken down their windows plotter drivers. Fortunately I haven't :-) You can get the drivers from my site here: http://www.neon-john.com/Neon/Misc/misc_home.htm Bottom of the page. ( a google click or two would be appreciated :-) You'll have to experiment a bit to find out which Roland plotter most closely approximates your plotter. This is a universal solution that will let just about any program send vector images to the plotter via windows printing. Just for kicks sometime, print a text file from WordPad and watch what happens. The plotter carefully draws each and every letter. If, for some reason, this doesn't work, there is another method that I use with CorelDraw and any other package that can export the drawing in HPGL format. Simply choose export, select HPGL and select a place to store the file. Then use Hyperterm or any other terminal package capable of sending out an ASCII file and copy the HPGL file to the COM port that the plotter is connected to. This will be generic HPGL and won't have any plotter setup info in it. OTOH, usually none is needed. My HP plotter and/or Hyperterm (can't remember which is the culprit) does NOT use Xon/Xoff handshaking. Therefore hardware handshaking MUST be enabled and wired in the interface. Additionally, several pins must be jumpered together to make things work. When you get that far, drop me a note and I'll go dig out my adapter and give you the wiring. This handshaking requirement applies to the XP drivers too. A few notes about using a pen plotter
Re: [time-nuts] OT: Need HP 7475A Drivers for XP or Linux
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY This one was free and there's much satisfaction in making the old stuff work once more. When I get it set up it will likely be used to output cad plots for EDA work including PCB artwork, and schematics. It may be slower than the current inkjets but it fits the budget and I do it because I can. Eric On 10/21/07, Joseph Gray [EMAIL PROTECTED] wrote: Speaking of plotters, I know there are still some things that you need a plotter for, but the inkjets are faster, higher resolution and much _quieter_. A while back, I picked up a used HP 1220C for cheap. It does B-size. I don't use it much, but I keep it around for when I do need it. BTW, just in case anyone has or is looking for an HP 1220C, there was a very common failure in the power supply with this model. That's why I got mine so cheap. If it doesn't power up at all, look for a burned-up resister. The fix is a new resistor, with a higher wattage rating. If you Google, you'll find this documented somewhere. That's how I originally found out about it. ___ 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] OT: Need HP 7475A Drivers for XP or Linux
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY HPGL yes, HPGL/2 no. On 10/21/07, Max Robinson [EMAIL PROTECTED] wrote: I could be wrong but it seems to me that the 7475 did support HPGL in ASCII form. I used to use the older versions of AutoCAD which had built in drivers for it. I've written a graphics program that outputs in HPGL. I use Corel Photo Paint 8 to convert the files to almost any other graphics format. Regards. Max. K 4 O D S. Email: [EMAIL PROTECTED] Transistor site http://www.funwithtransistors.net Vacuum tube site: http://www.funwithtubes.net Music site: http://www.maxsmusicplace.com To subscribe to the fun with tubes group send an email to, [EMAIL PROTECTED] - Original Message - From: Didier Juges [EMAIL PROTECTED] To: 'Discussion of precise time and frequency measurement' time-nuts@febo.com Sent: Saturday, October 20, 2007 10:01 PM Subject: Re: [time-nuts] OT: Need HP 7475A Drivers for XP or Linux Well, it you are trying to use it as a Windows device, that's something else. I don't think it can hurt to try HPGL. I am not sure what language that plotter used, but I am sure it was not HPGL, it used a simple set of ASCII commands. It may have actually supported more than one language, but I doubt it. It was a long time ago :-) A manual might help. I doubt that the 7550 would use the same commands, it is an inkjet printer. If it has its own driver, that's probably because it does not support HPGL or any other type of standard language. Sorry I can't help... Didier KO4BB -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Joseph Gray Sent: Saturday, October 20, 2007 9:42 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] OT: Need HP 7475A Drivers for XP or Linux I'm looking at the Add Printer dialog in WinXP right now. I see HP-GL/2 Plotter and HP 7550 Plus listed. Shouldn't one of those work? - Original Message - From: Didier Juges [EMAIL PROTECTED] To: 'Discussion of precise time and frequency measurement' time-nuts@febo.com Sent: Saturday, October 20, 2007 8:32 PM Subject: Re: [time-nuts] OT: Need HP 7475A Drivers for XP or Linux I did write some QuickBasic code for that plotter a number of years ago. I used it to plot data from an HP 8566 that was subjected to calculations that were more easily done in a PC than on the instrument. I also plotted data from an HP network analyzer, forgot which. If I recall, the commands are simple and the plotter is easy to control (if you write your own code). I am not aware of any drivers you can use with shrink-wrap software, but I would be surprised if someone has not done that under Linux. Didier KO4BB -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Eric Fort Sent: Saturday, October 20, 2007 8:57 PM To: Discussion of precise time and frequency measurement Subject: [time-nuts] OT: Need HP 7475A Drivers for XP or Linux There seems to be a wealth of knowlege here about keeping older HP hardware running. Would anyone in this group have experience using a 7475A plotter under XP or Linux to plot test data or drawings. I'd like to get mine running again. Thanks, Eric ___ 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 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. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.488 / Virus Database: 269.15.5/1084 - Release Date: 10/21/2007 3:09 PM ___ 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] OT: Need HP 7475A Drivers for XP or Linux
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY There seems to be a wealth of knowlege here about keeping older HP hardware running. Would anyone in this group have experience using a 7475A plotter under XP or Linux to plot test data or drawings. I'd like to get mine running again. Thanks, Eric ___ 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] Scope Clock
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY jan seems to be having a bit of trouble posting so I'll add his off list reply to the list discussion. I too have one of these on it's way and look forward to building it. Eric Hi, Eric. I saw the discussions on the TimeNuts list but haven't figured out how to respond to the list so I'm emailing you directly. The DAC used on the clock has indeed a fairly high output impedance which makes the outputs sensitive to noise. This is minimized by a careful layout and a ground plane around the traces. The other result is that there are visible vector retrace lines (when the beam jumps from one location to another) if there is a significant capacitance on the outputs. This effect is minimal when using 10X probes. There is a suggested hardware modification using 2 load resistors in the FAQ that will significantly reduce the output impedance (thus the capacitance sensitivity) and also will reduce the voltage swing, which will reduce non-linearities. Take a look at: http://www.dutchtronix.com/ScopeClock2-6faq.htm#LoadResistors Your clock kit is on the way -Jan- On 8/2/07, Robert Atkinson [EMAIL PROTECTED] wrote: ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi Nigel Eric, I've just order one of Jan's clocks. He has just got PCB's back in stock. I looked quite carefully and 1PPS is standard. The board has a PCF8563 RTC chip with a 1PPS output that is used by the microprocessor. The signal line has a 2 pin header that has a jumper for internal 1PPS or you can use the header to supply an external 1PPS. The clock has two basic modes of operation, one where the microprocessor just reads the RTC and displays that time, the other (AVR Master Clock) where it counts the 1PPS. While in master mode it updates the RTC to use for reversion in case of power fail (The RTC has battery back-up on the board). It looks like a great little board. The only limitation I can see is that the ADC's are un-buffered R/2R ladder types with fairly high output impedance. I want to drive a small X-Y display so I think I will have to build a buffer amplifier. I'll keep the group up dated. Robert G8RPI. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: 31 July 2007 23:32 To: time-nuts@febo.com Subject: Re: [time-nuts] Scope Clock ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 31/07/2007 23:23:38 GMT Daylight Time, [EMAIL PROTECTED] writes: as ordered will these boards accept 1pps or was yours a special? Eric kg6kqt --- Hi Eric Take a look at. _http://www.dutchtronix.com/ScopeClock.htm_ (http://www.dutchtronix.com/ScopeClock.htm) It looks like the 1PPS is standard. I've got a 12 inch X-Y display doing nothing right now.. and I'm very tempted to have a play with one of these:-) regards Nigel GM8PZR ___ 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. Genetix Limited - Queensway, New Milton, Hampshire, BH25 5NN Registered in England No. 2660050 www.genetix.com Any opinions expressed in this email are those of the individual and not necessarily Genetix Ltd (Genetix) or any company associated with it. This email and any files transmitted with it are confidential and solely for the use of the intended recipient. If you are not the intended recipient or the person responsible for delivering to the intended recipient, be advised that you have received this email in error and that any use is strictly prohibited. If you have received this email in error please notify Genetix by telephone on +44 (0)1425 624600. The unauthorised use, disclosure, copying or alteration of this message is strictly forbidden. This mail and any attachments have been scanned for viruses prior to leaving Genetix network. Genetix will not be liable for direct, special, indirect or consequential damages as a result of any virus being passed on, or arising from alteration of the contents of this message by a third party. ___ 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] Scope Clock
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY as ordered will these boards accept 1pps or was yours a special? Eric kg6kqt On 7/23/07, Mark Amos [EMAIL PROTECTED] wrote: ); SAEximRunCond expanded to false Errors-To: time-nuts-bounces+eric.fort= [EMAIL PROTECTED] Time Nuts, I built one of these clocks a couple of months ago. In earlier correspondence with Jan De Rie I asked him to allow for input of an external 1PPS clock (which he graciously did!) I drive the clock from a conditioned 1PPS signal out of a Shera GPSDO that I built. It's a great conversation piece, and it's very inexpensive (not including the scope...) Jan's a great guy and does nice work. Mark W8XR -Original Message- From: [EMAIL PROTECTED] [ mailto:[EMAIL PROTECTED] Behalf Of Maggie Leber Sent: Monday, July 23, 2007 8:07 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Sorry: meant to change the subject line: New o-scopeclock display project Maybe some of you haven't seen this oscilloscope clock display yet: http://www.makezine.com/blog/archive/2007/07/avr_oscilloscope_clock.html ___ 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.
