Re: [time-nuts] Hobbyist grade or homebrew temperature testing chamber?
There are cheap GC (gas chromatograph) ovens on eBay. They are well-insulated and give you fast, precise temperature control. Some of them are designed with a liquid nitrogen input for cooling. Otherwise, you can use dry ice. I saw one mentioned on one of the mailing lists I read, maybe this one, a few months ago. I meant to buy one, but got side-tracked. Unfortunately, I can no longer recall the brand. Brent On 9/5/2016 8:48 PM, Richard (Rick) Karlquist wrote: As we all know, step #1 in making a clock is NOT to build a thermometer :-) I thought I would check the brain trust here to see if anyone has seen a hobbyist grade temperature testing chamber or kit or homebrew design. I have some crystals, oscillators, and other electronics I would like to characterize over temperature. I know this reflector has discussed homebrew stabilization ovens; however, they have tended to have very long time constants (which makes sense for that application). I need to be able to change temperature in a reasonable amount of time, and I don't need extreme stability. Looking for any ideas, maybe in the "maker" spirit. I think the size I need would be perhaps 1/2 the size of a shoebox. BTW, in case someone has a chamber to sell, let me know... Rick Karlquist N6RK ___ 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-Ethernet
Joe, I've had good luck with Systech Terminal Servers on eBay. I've bought five of them for use at home and work and none of them have had any problems. Two port ones are around $20 and four port ones are around $50. Some of them support RS-485. Make sure they come with the power supply. The supply is readily available, but why spend another $20? When configuring, you have to set them up as "Reverse Telnet". The only issue we've had is if the controlling program crashes, the Systech doesn't close the serial port. This blocks any new connections. At work, before we started buying the Systech boxes we bought VLinx ESP211's from B Electronics. Pricey, but they work well. They also support RS-485. Brent On 2/25/2016 6:50 AM, Joseph Gray wrote: What USB-Ethernet devices have you had good luck with? I am considering a somewhat expensive Silex device. I did buy a used Belkin-branded box that was made by Silex, but it kept disconnecting/reconnecting the USB devices. This seemed to be a common problem with this particular Belkin box. Joe Gray W5JG ___ 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] Prologix_GPIB vi
There are two ways to do it. The first is to turn off AutoScale. You can then set the axis to whatever you want. Right-click on the axis and uncheck "AutoScale X". See AutoScale.png. The hard way is to force the axis to be what you want. First you turn off AutoScale. Then you right click on the graph icon in the block diagram and go through five menus to select Maximum. See SetRange.png. Once you have Maximum, you just drag down on the bottom edge of the property node to get Minimum. Brent On 2/1/2016 11:35 AM, Bill Reed wrote: I have just gotten Labview Home, This is the first serious vi I have written. It sweeps an HP3325A , collects data on an HP3478A and sweeps. The sweep is strip and I would like the Xaxis to be stationary with Fmax and Fmin as the limits. I can not find this plot type in the library. Any suggestions? Bill Reed ___ 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] GPS outage? 19:00-2100 UTC Tue
No problems in Albuquerque, NM. On 8/19/2015 2:11 AM, Hal Murray wrote: Most/all of my GPS toys stopped working for a few hours late Tue evening. A few where I have good logging ran out of satellites. Did anybody else notice anything similar? Was it local interference, or something at the GPS level? I'm in Menlo Park California. That was mid afternoon local time, PDT ___ 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] potential source for cheap copy of labview
You don't have to wait for the software to arrive if you don't mind downloading it. The software you download is the same as the software National Instruments (NI) ships to their customers. Without a serial number the software runs for 45 days. When you activate the software, using your serial number, the software contacts NI's server which then activates whatever features you've purchased. It is true that LabVIEW programs, in general, run on Mac, Windows, and Linux without any changes. Some features are Windows only because they depend on Windows libraries, ActiveX for example. Linux is not as well supported as Windows and Mac. It only runs on certain distributions with an old 2.?? kernel. Brent On 6/20/2015 6:48 PM, Brooke Clarke wrote: Hi Dave: When I was working with LV you could run the program on a Mac, Windows or Unix without any changes. It's my understanding that's still true. Note the instruments that accept SCPI commands are pretty much interchangeable. It's the R2D2 commands that are model number specific. The software is coming via Fedex ground from Washington state so should be here in a few days, more then. Mail_Attachment -- Have Fun, Brooke Clarke ___ 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] potential source for cheap copy of labview
Here's the National Instruments web page about the Maker (I also hate that term) version. http://sine.ni.com/nips/cds/view/p/lang/en/nid/213095 It is the same as the $2999 Full version http://sine.ni.com/nips/cds/view/p/lang/en/nid/212666 with the addition of the $2119 Control and Simulation Module and the $520 MathScript RT module. Other than the licensing terms, the only real difference is that it puts a watermark on the front panel and block diagram of every VI. Every version of LabVIEW supports GPIB, you just have to download the driver disk. Even though I've got the Full Developer suite, I'll probably buy this version just to play with Control and Simulation Module. It's not really clear from the labviewmakerhub.com site or the ni.com site that you download LabVIEW from either of those two sites but pay for a license key at https://www.digilentinc.com/Products/Detail.cfm?NavPath=2,1301,1450Prod=LABVIEW-HE Brent Gordon Certified LabVIEW Developer On 6/19/2015 9:18 PM, Bob kb8tq wrote: Hi It is interesting as you go through the various student and home versions, just how hard it is to figure out what you are (and are not) buying in each case. One example would be the inclusion (or not) of GPIB capability. One would *assume* it’s in there and fully functional. At lest for me it’s a “must have” item on the check list. If anybody comes across a deep dive on what is / is not in each package, I’d certainly like to see it. Bob On Jun 19, 2015, at 1:40 PM, Eric Garner garn...@gmail.com wrote: National Instruments (and may other vendors of software) has apparently cottoned on to the fact that if they don't start catering to the Maker market (I hate that term) that they will get left behind. In that spirit they have released a non-commercial licence of labview. you can learn more about it here: https://www.labviewmakerhub.com/ I mention it on this list since many of us would like to use labview in our home labs but haven't been willing to shell out for the exorbitant price. I'm currently using one of the spare licences from work to to labview stuff at home, but i'd be willing to shell out the $49 to see what it got me. I'm sending this out in the spirit of information, I'd rather not have this devolve into the labview sucks sort of discussion that often comes up with it's mention. I haven't explored it much, but wanted to send it out. -- --Eric _ Eric Garner ___ 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] USB problems and solutions - Some what Off Topic
Lately, I've been seeing blue screens that I think are caused by my serial-USB adapters. Because I haven't updated by serial drivers since before the driver update fiasco a while back, my feeling is that this was caused by some other update. Regarding the COM ports, here is a article on how to see all devices, past or present: http://www.techrepublic.com/article/viewing-non-present-devices-in-windows-xps-device-manager/ Although it is written for WinXP, it also works on Win7. I assume it will work on Vista. Once you see the old devices you can remove them, one at a time. As for making the assignments static, that only works with some adapters. I think it depends on if an adapter reports a serial number. You can manually change the assignment for a port. 1. Open Device Manager. 2. Double-click on the port you want to change. 3. Select the Port Settings tab. 4. Click the Advanced... button. 5. Change the port number. Windows will complain that the port is already in use. Ignore the warning; just unplug and replug the device into the same USB port. It will now run with the new assignment. Brent On 5/29/2015 1:17 PM, Cash Olsen wrote: I have been plagued with hard crashes of the computer when plugging in and unplugging USB devices. I have generally determined that some of the USB to serial devices are the worst offenders. I am also suspicious of some of the hubs. I wander if even the operating system is partly to blame. I'm using Windows Vista, and have several different USB to serial adapters. Most are Silicon Labs and Prolific. I thought I had the problem resolved with Prolific by over-riding the driver and installing an earlier version but Windows may have updated the driver, that seems to be a common problem. I'm coming to time-nuts because I remember that at least one member had a very large number of adapters on one computer, so I'm hoping to find some help. I don't generally seem to have trouble with other USB devices, just the serial adapters. One further issue, the COM ports are marked in use from 3 to 50+ and I'm only using at any one time 3 or 4. Can I clean up the assignments and can I make the assignments static after connect and reconnect or restarting the computer? ___ 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] Once again about counter calibration
Just feed the PPS into the scope trigger on step 2. The low repetition rate on the PPS would make this difficult on an analog scope; on a digital scope it is easy. You can use any sub-harmonic that is less than or equal the counter reference frequency (10 MHz). Brent On 4/24/2015 3:45 PM, d0ct0r wrote: Hello, The input: HP 5386A which I would like to calibrate, Well warmed Tremble Thunderbolt (1PPS only), 10 Mhz Datum OCXO (unknown accuracy), Rigol 1101E Oscilloscope. The goal is to calibrate counter to read the Datum OCXO. === Reading the manual for 5386A, there is simple schema for calibration: 1. Connect HP 5386A 10Mhz OUTPUT to Oscilloscope 2. Connect Frequency Standard to Ext. Trigger on Oscilloscope 3. Adjust the frequency on 5386A TCXO for minimum sideways movement of 10 Mhz signal However, my Trimble TB 10Mhz output is currently in use. I have only 1PPS signal available. The HP manual do not mention what exactly frequency needs to be on Frequency Standard connected to Ext. Trigger. Is there any method/option I could apply to calibrate HP counter ? Thanks ! ___ 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] TimeLab with Wine: No RS232 interface available
Don't remove the serial mouse, just disable it. If you remove it, it will return on the next reboot. On 2/7/2015 9:11 AM, Jim Lux wrote: There's also the whole microsoft serial mouse device problem. A typical Windows 7 install (and other versions as well) will have a MS serial mouse device in the device manager, and when booting, the device driver goes out and looks for the mouse on COM1 (and maybe other COM devices) If the wrong characters come back from the device at the wrong time (e.g. something from the GPS receiver), the mouse driver takes over the device (and randomly moves the cursor around the screen, sometimes). You need to explicitly disable the device (and/or remove it) in Device Manager. ___ 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] rs-422 rs-232 to fast ethernet converter
I haven't used this particular model. I have used similar units from Systech, purchased on eBay for less than $30 US. They work quite well. Some of them have selectable RS-232/RS-485 outputs. I've successfully used both types of outputs. The only problem I've had was the initial configuration. The trick is to configure the serial ports as a Reverse Telnet server. Search eBay for terminal server. You can also search the Time Nuts list, they were discussed a few years ago. Brent On 11/22/2014 3:47 PM, Graham wrote: I have been contemplating how I will would like to interface to the KS-23461 devices using rs-422. One option is a rs-422 to USB cable. Seems easy enough. But another option I keep stumbling across is a rs-422/rs-232 to fast ethernet such as: http://www.transition.com/TransitionNetworks/Products2/Family.aspx?Name=SDSFE3110-120 Frankly, I have no first hand knowledge or experience with these devices. First glance suggests that it might just be what I want - easy access to the KS-23461 ports through a connection to my local network without having a PC of some sort close by. So, any first hand experience with such devices? Good idea or bad? cheers, Graham ve3gtc ___ 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] LTE Lite Question
I got my LTE Lite this afternoon and have been playing with it. I have a question on the NMEA $PSTI message: what are the last two numbers before the checksum (in this case 30, 0)? I've noticed that once the site survey is complete they go away, just the comma is left. $PSTI,00,1,1701,4.4,30,0*35 ___ 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] temperature sensor
The maximum temperature of saturated steam temperature depends on pressure; unsaturated steam does not. At work, we just finished a project using steam at over 800F to drive a jet mill. Brent http://en.wikipedia.org/wiki/Superheated_steam On 7/21/2014 5:39 PM, Attila Kinali wrote: On Mon, 21 Jul 2014 18:00:59 -0400 Chuck Harris cfhar...@erols.com wrote: Steam superheats only if the pressure is raised above standard pressure, otherwise, steam at standard pressure will be exactly 212F, or 100C. Uhm.. you are the second one claiming this. Could you please explain what physics limits the temperature of vapor? The ideal gas equation says that p*V/T = const, ie that the temperature can rise at a constant pressure, as long as the gas is allowed to expand. Attila Kinali ___ 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] Atomic Bill from leapsecond.com on Adafruit
http://www.adafruit.com/blog/2014/04/16/first-atomic-clock-wristwatch-the-hewlett-packard-5071a/ ___ 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 port splitter s/w
___ 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 port splitter s/w
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Re: [time-nuts] GPIB/HPIB Address 31, Talk Only
That's part of the GPIB standard. It should work on any GPIB system. On 8/7/2013 1:22 PM, stan, W1LE wrote: Hello The Net, Is address 31, for talk only, a HP/Agilent feature only, or do tothers provide talk only on the buss ? I am looking at RF frequency counters to 12 GH, for use with TimeLab. Stan, W1LE Cape Cod FN41sr ___ 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 Prototype Boards
I once saw a board that was 2.5 mm, which would cause what you describe. As soon as I figured out what the problem was, in the trash it went. Brent On 6/25/2013 8:03 AM, Bob Stewart wrote: OK, I see in the wiki that 0.1 is by definition 2.54mm. I was taught it was 2.54001, but that's not right, either. But, if industry says that they're defined as the same, then I'm the one out of date. =) I wonder what was with that old prototype board. I can't find it, so it must be in a landfill, but it was just exactly the wrong size to fit a chip. You could get the first few pins in, but then the differences would be enough that no more would fit. Bob ___ 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] Selecting a Microcontroller
Registration is required; that's the price you pay for a free course. Once registered, you click on the title of each day's class to go to that class. Near the top of the page is a heading Special Educational Materials with a link to Today's Slide Deck underneath. Click the link to download the presentation, open the presentation, then start the audio player on the class page. Some of the classes are really good, Jon Titus for example. Brent On 5/27/2013 1:52 AM, Herbert Poetzl wrote: On Sun, May 26, 2013 at 11:38:35AM -0600, Brent Gordon wrote: The two threads here, Good (cheap) PIC chip choice for project? and Follow-up question re: microcontroller families have a lot of good information. A more organized approach is available at the Digi-Key/Design News Continuing Education Center which has several free courses on microcontroller basics and selecting a microcontroller. You download a Powerpoint presentation and follow along to an audio stream. Does it require registration or am I just not seeing the downloads on the linked pages? thanks, Herbert For example: Microcontrollers, Basics; Microcontrollers, Advanced; and Hands-On Analysis of Five MCU Development Kits at http://www.designnews.com/lecture-calendar.asp?p_l_ed=CEC_Semester_One_2012 ARM Cortex-M0 at http://www.designnews.com/lecture-calendar.asp?p_l_ed=CEC_Semester_Two_2012 How to Choose a Microcontroller Architecture at http://www.designnews.com/lecture-calendar.asp?p_l_ed=CEC_Semester_Three_2013 ___ ___ 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] Selecting a Microcontroller
The two threads here, Good (cheap) PIC chip choice for project? and Follow-up question re: microcontroller families have a lot of good information. A more organized approach is available at the Digi-Key/Design News Continuing Education Center which has several free courses on microcontroller basics and selecting a microcontroller. You download a Powerpoint presentation and follow along to an audio stream. For example: Microcontrollers, Basics; Microcontrollers, Advanced; and Hands-On Analysis of Five MCU Development Kits at http://www.designnews.com/lecture-calendar.asp?p_l_ed=CEC_Semester_One_2012 ARM Cortex-M0 at http://www.designnews.com/lecture-calendar.asp?p_l_ed=CEC_Semester_Two_2012 How to Choose a Microcontroller Architecture at http://www.designnews.com/lecture-calendar.asp?p_l_ed=CEC_Semester_Three_2013 ___ 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] Adding 10Mhz to Lucent RFTGm XO GPSDO
Maybe this link won't wrap. If it does, the last half of the url is RFTGm/Lucent RFTGm Modification.doc http://207.224.127.233/RFTGm/Lucent RFTGm Modification.doc Brent On 1/16/2013 8:56 AM, paul swed wrote: Sorry the link does not work. Looking forward to the read Paul WB8TSL On Wed, Jan 16, 2013 at 10:45 AM, Skip Withrow skip.with...@gmail.comwrote: Hello nuts, I have added a 10MHz output to the Lucent GPSDO several times over the last several years, and have finally documented the modification. I'm throwing it out to the public domain for all nuts to enjoy. If there are any changes that should be made please let me know. I have uploaded a MS-Word document to KO4BB's manual site (it should be under recent uploads). Or, you can access it from the following link - http://207.224.127.233/RFTGm/Lucent RFTGm Modification.doc . Enjoy, Skip Withrow ___ 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] UTC + 0 (was Accurate timestamping on computers )
Reykjavík, Iceland is UTC+0 without summer time changes. Brent On 11/3/2012 9:55 AM, Sarah White wrote: P.S. Seems strange that the only two options for a UTC+0 timezone are London, Dublin or Casablanca (neither of which are year-round UTC) ... I'll try to remember to point this out to the cyanogenmod team (running an aftermarket version of android, cyanogenmod on my phone) so it can be fixed in the next release. ___ 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] Tracking NTP displacement and correlation between two clients.
David Taylor has all sorts of NTP monitoring scripts, software, and tips at his web site. Start at http://www.satsignal.eu/software/net.htm#NTPmonitor and look around. Brent On 10/4/2012 8:44 AM, bownes wrote: It had to happen eventually. Time Nut interest overlapped with $DAY_JOB. Due to reasons I really can't go into, a systems user is concerned with the displacement of two servers from the same pair of stratum 2 NTP servers. I'm convinced that it really isn an issue as long as the two systems in question remain within a few 10's of ms. However, I have no off the shelf method of collecting and correlating the data. Before I go out and invent the wheel, I thought I would check and see if anyone has done such a thing and saved the scripts and whatnot. Thanks! Bob ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] WOT: Identify this movie
Which was made into the movie Soylent Green. On 9/25/2012 5:34 AM, Tom Harris wrote: Sounds like the OP's story was from Harry Harrison's nightmarish novel of overpopulation Make Room, Make Room!. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] problem with HP 59309A digital clock and HP IL/IB interface
I'm not familiar with the 59309A, but here are some things to try: Are you able to read just one character (1A)? Does the 59309A need a command to send the time? Have you tried setting the 59309A to talk-only mode? On 8/2/2012 2:20 PM, Hans Holzach wrote: RESET HPIL RESTORE IO SEND TALK11 (ADDRESSED light of the clock is now permanently on) ENTER :11 USING #,9A;D$ (i also tried 10A, 11A etc. and ENTER LOOP) ___ 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] Holy cesium clock, Batman!
Same Bat Time! Same Bat Channel! On 4/7/2012 8:38 PM, J. Forster wrote: So, what's the time? -John - On 08/04/12 02:59, Mark Sims wrote: One of the nose-bleed channels (MeTV) just showed an old 1980's Batman show where the infamous, evil, dastardly villain Clock King attempted to steal a Cesium Clock (worth over one million dollars!). He was unsuccessful and is still out there. All time-nuts, protect your Cesium Clocks! We cannot let him be successful in obtaining this vital technology. http://batman.wikia.com/wiki/The_Clock_King_(Walter_Slezak) (BTW, did you know there is a town named Batman in Turkey?) ___ 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] WWVB and solar flare
There are three things going on with WWVB right now 1. They are testing a new data format: http://www.nist.gov/pml/div688/grp40/wwvb.cfm 2. They had an outage for about an hour earlier today: http://www.nist.gov/pml/div688/grp40/wwvb-station-outages.cfm 3. There are reception failures at monitoring stations in Wisconsin and California (but Maryland is fine): http://tf.nist.gov/tf-cgi/wwvbmonitor_e.cgi Brent On 3/8/2012 9:46 AM, Jim Hickstein wrote: My Spectracom 8170 WWVB receiver hasn't locked up since yesterday sometime. It was a bit flakey before, but at least one other WWVB clock in the house is also struggling (the others don't give a clear indication), so I'm thinking of blaming the solar flare. Does this affect LF especially? ___ 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] Schematic capture, anyone?
I've used EAGLE for about ten years. I strongly agree with what NeonJohn wrote below. I don't know if it is still the case, but when I started using EAGLE all of the library parts were on metric spacing (including DIPs and SMDs). This causes all sorts of headaches when doing a layout on inch spacing; traces don't meet the pads. I ended up creating my own libraries using the EAGLE libraries as a guide. I had one main library (1_main.lbr) for standard parts and additional libraries of specialized parts for each project. Brent On 2/26/2012 3:36 PM, NeonJohn wrote: I use professionally. It was the best that our small company could afford. Here are some tips that will save you mucho grief. 1) This is the biggie. Make your own parts library. Then put any part that you have to create in that library. As well, put a copy of any standard library part in your library AFTER you've verified that the part, especially the footprint is valid. Then put that library under SubVersion or whatever version control system you use. I call my library 00johh.lbr. The 00 makes it appear first in the library list. 2) another biggie. Validate any part that you take from an Eagle library. ___ 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] How best to exchange Large files?
I've used this http://free.mailbigfile.com/ for years. You upload the file and they send an email to the recipient who then downloads the file. Brent On 2/20/2012 10:52 AM, WarrenS wrote: I'm just looking for an easy, temporary way (say lasting up to a week each) to transfer a few big files that are too large to email. Suggestions anyone? Thanks ws ___ 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] Distance between GPS Antennae
Tom, Yes, this is the same board that you played with. The only difference is that the code on the GPS chip is NBCAA-1110 instead of CNAA1038. I did not save any NMEA logs, just the VisualGPS diagrams. When I collected the data I had just received the Sure GPS unit and wasn't doing any serious testing of it. When this topic came up, I thought Hey! I've got some cool data that shows interference. Both boards were in their power-on default mode. As you know, the Sure GPS defaults to factory settings after it has been powered down for a while. From the documentation links on your web page, there doesn't seem to be a position hold mode for this GPS. A quick test shows that the first 20-30 points wander around before the unit locks the position. Maybe K4CLE's comment Some GPS receivers automatically go into position hold mode if less than 1 mph is detected for several seconds. applies to this board. I will be [DEL: playing with :DEL] testing these units over the next two weeks and see what I can learn. I've got two patch antennas, two timing antennas, and a powered splitter. I also have a couple of Thunderbolts. However, because I have a metal roof, the Thunderbolts lock on to fewer than five satellites at a time. The Sure and Copernicus both lock on to twelve. How did you measure the PPS jitter on your unit? I'd like to do a similar measurement on mine. Brent On 12/18/2011 3:02 PM, Tom Van Baak wrote: From: Brent Gordon [1]time-n...@adobe-labs.com The best answer is try it it and see what happens. In my case two systems with patch antennas ten inches apart interfere significantly. Here are plots (using VisualGPS) of my position over a day or two. This is using a GPS from Sure Electronics. Note that the standard deviation is 0 for over 100,000 samples. As a side note, it must have some kind of heavy filtering going on to not show any position variation. This kind of result is repeatable with this unit. Brent, That's really interesting. It looks like one receiver is in GPS hold mode (so you would expect the position to remain fixed) and the other is in a normal 2D or 3D mode. Can you look at the NMEA logs and tell which is which? Is this the same GPS receiver I played with (leapsecond.com/pages/MG1613S)? Thanks, /tvb ___ time-nuts mailing list -- [2]time-nuts@febo.com To unsubscribe, go to [3]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. References 1. mailto:time-n...@adobe-labs.com 2. mailto:time-nuts@febo.com 3. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts ___ 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] Labview and searching archive
At Amazon: http://www.amazon.com/LabVIEW-2009-Student-Robert-Bishop/dp/0132141299/ ISBN-10: 0132141299 ISBN-13: 978-0132141291 The Student Edition is also compatible with all National Instruments data acquisition and instrument control hardware. Note: The LabVIEW 2009 Student Edition is available to students, faculty, and staff for personal educational use only. It is not intended for research, institutional, or commercial use. For more information about these licensing options, please visit the National Instruments website at (http:www.ni.com/academic/). This is LabVIEW 2009. The current version is 2011. You don't gain anything major (except maybe better Win 7 operation) with the newer version. The biggest limitation of the academic version is that you can't build executable files. Brent On 12/15/2011 8:51 AM, J. L. Trantham wrote: I would like to know the details. Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of shali...@gmail.com Sent: Thursday, December 15, 2011 9:27 AM To: Time-Nuts Subject: Re: [time-nuts] Labview and searching archive I have not looked recently, but you can sometimes find older versions on eBay when you buy a GPIB card. My son's electronics circuit study book from last year came with a Labview CD and student license. You can buy the book on Amazon for $$90 (as of last year). If anyone is interested, I will find out the ISBN. Didier KO4BB Sent from my BlackBerry Wireless thingy while I do other things... -Original Message- From: paul swedpaulsw...@gmail.com Sender: time-nuts-boun...@febo.com Date: Thu, 15 Dec 2011 10:16:33 To: Discussion of precise time and frequency measurementtime-nuts@febo.com Reply-To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: Re: [time-nuts] Labview and searching archive Actually I would like to know also. I actually had a license for an older version. Unfortunately I had a disk issue that blew it away. Further though I am very good about documenting licenses somehow in this case I can't find it. Perfect. Regards Paul. On Thu, Dec 15, 2011 at 9:52 AM, Bill Daileydocdai...@gmail.com wrote: Wondering how people are getting labview. Is there a hobbyist version that isnt super high priced or a place to get a cheapo license? How is it done? I obviously just want to play with it and iuse it for non-commercial reasons and cant justify the full price feel free to email me offline if there is a secret handshake. Also, periodically I would liek to search the archives but havent yet figured out how to do it... can anyone help with that? -- Doc Bill Dailey KXØO ___ 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] Labview and searching archive
Paul, If it was a version prior to 8.x, you don't need a serial number or any kind of license key. With 8.x and later, your serial number is validated through National Instruments' servers. If you registered your software with NI, you should be able to get your serial number from them. Also, with any version after 7.1, you can download it from NI's web site. Brent On 12/15/2011 8:16 AM, paul swed wrote: Actually I would like to know also. I actually had a license for an older version. Unfortunately I had a disk issue that blew it away. Further though I am very good about documenting licenses somehow in this case I can't find it. Perfect. Regards Paul. ___ 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] Labview and searching archive
From the NI web site (http://www.ni.com/labviewse/select.htm) LabVIEW Student Edition Textbook Bundle The LabVIEW 2009 Student Edition Textbook Bundle includes the LabVIEW Student Edition software and Dr. Robert H. Bishop's popular introductory textbook Learning with LabVIEW, published by Prentice Hall. The textbook bundle includes the following National Instruments software: LabVIEW 2009 Student Edition for Windows 7/Vista/XP LabVIEW 2009 Student Edition for Mac OS X 10.4.0 or later Learn more about the LabVIEW 2009 Student Edition Textbook Bundle. Note: The LabVIEW 2009 Student Edition Textbook Bundle, available from Prentice Hall, does not include all the advanced modules and toolkits included in the LabVIEW Student Edition Software Suite. On 12/15/2011 9:12 AM, paul swed wrote: Well I did indeed try to see what would happen by ordering through the ehub site. Boy talk about 1989 connectivity. The sites so slow nothing ever happens per page like 5 minutes. I did see the amazon listing but thought that was just the book actually. So not really sure what you are getting. Regards Paul On Thu, Dec 15, 2011 at 11:07 AM, Brent Gordontime-n...@adobe-labs.comwrote: At Amazon: http://www.amazon.com/LabVIEW-**2009-Student-Robert-Bishop/dp/** 0132141299/http://www.amazon.com/LabVIEW-2009-Student-Robert-Bishop/dp/0132141299/ ISBN-10: 0132141299 ISBN-13: 978-0132141291 The Student Edition is also compatible with all National Instruments data acquisition and instrument control hardware. Note: The LabVIEW 2009 Student Edition is available to students, faculty, and staff for personal educational use only. It is not intended for research, institutional, or commercial use. For more information about these licensing options, please visit the National Instruments website at (http:www.ni.com/academic/). This is LabVIEW 2009. The current version is 2011. You don't gain anything major (except maybe better Win 7 operation) with the newer version. The biggest limitation of the academic version is that you can't build executable files. Brent ___ 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] T.I. experimenting - newbie question
Hi Joe, Both VoP and impedance depend on relative permittivity (dielectric constant). See the section Derived Electrical Parameters on Wikipedia. http://en.wikipedia.org/wiki/Coaxial_cable Brent On 4/3/2011 4:37 PM, Joseph Gray wrote: I assume you mean that impedance has an effect on VOP? Can you point to any internet sources that explain this effect? Preferably something not overly technical. Joe Gray W5JG On Sun, Apr 3, 2011 at 4:11 PM, paul swedpaulsw...@gmail.com wrote: It does change vop ___ 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] Mains as time-reference
Both programs work for me. I'm running WinXP. Brent On 12/30/2010 3:58 PM, Anthony G. Atkielski wrote: There's a beautiful screensaver available at http://gridwise.pnl.gov/technologies/ which shows the US WECC ( or so it seems ). I tried running the monitor program (not the screen saver), and it says that I have no Internet connection available. A sniff of the network indicates that it is doing no network I/O, although it remains in the system until I kill 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.
Re: [time-nuts] WTB: Older Version of LabView
I found version 8.0 bloated and slow, especially compared to version 7.1. It also slowed my computer to a crawl, even when it wasn't running. Version 8.0 was even worse than 7.0. Version 8.2 was a little bit better. Version 8.6 was usable, however NI dropped support for older systems, which is what I was supporting at the time. The LabVIEW Project (which was added in 8.6, I think) made life easier. LabVIEW 2009 is pretty good. I haven't had a chance to really test LV2010. I'm working with real-time systems and LV2010 isn't recognizing them yet. For quick and easy use of GPIB, LabVIEW can't be beat. It also gives you easy graphing and saving of data. In a separate email to the list you said that you wanted to play with PCMCIA GPIB on an older Thinkpad. I recommend you use version 7.1 It will do everything you need without bogging down your computer. For hobby use, 8.6 doesn't really get you anything and may be too much for your laptop. I used to run 7.1 on a 1.4 GHz Pentium M laptop, talking to three Keithley meters and a switch chassis over GPIB without any performance issues. I also ran the same test systems with 600 MHz Celeron processors and 256 MB of memory on Win98, Win2000, and NT 3.5 systems using 7.1. On those slow, memory-short systems, screen updates were a little slow but I never missed any data. Note that none of NI's PCMCIA products work with Vista or Win 7. Brent On 8/17/2010 8:15 PM, J. Forster wrote: I guess you snooze, you loose. There was just one copy w/o CDs just now. Why don't you like about Rev 8, if I may ask? Thank you, -John == Three copies of the Version 7.1 Student Edition are available here (found by a froogle search): http://www.textbooks.com/BooksDescription.php?CSID=DW2BW33KOOKBZKOMODUKCACQSBKN=715789#mplistings I was going to sell my copy until I saw the prices. As a long-time LabVIEW programmer, version 7.1 is my favorite. I really disliked all of the 8.x versions. The 2009 version isn't bad and I only installed the 2010 version today. Brent On 8/16/2010 11:36 PM, J. Forster wrote: Hi, Does anybody have an older version of NI LabView SW they'd like to sell? If so, please contact me off list. Thanks, -John == ___ 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] WTB: Older Version of LabView
Three copies of the Version 7.1 Student Edition are available here (found by a froogle search): http://www.textbooks.com/BooksDescription.php?CSID=DW2BW33KOOKBZKOMODUKCACQSBKN=715789#mplistings I was going to sell my copy until I saw the prices. As a long-time LabVIEW programmer, version 7.1 is my favorite. I really disliked all of the 8.x versions. The 2009 version isn't bad and I only installed the 2010 version today. Brent On 8/16/2010 11:36 PM, J. Forster wrote: Hi, Does anybody have an older version of NI LabView SW they'd like to sell? If so, please contact me off list. Thanks, -John == ___ 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] Which Rubidium to Get?
I'm considering buying a rubidium standard, not that I really need one, just because I'm a Time Nut. I have some questions on what to look for and what to watch out for. I'll probably get one from either fluke.l or flyingbest on ePay. I know that they wear out. Is there any model I should look for or avoid? I see both Efratoms and Datums; some of the auctions claim more lamp life left for the Datums. I know that the mating connector for the rubidiums with an RF inside the d-sub connector are expensive. Is it really needed or is the header connector good enough? Some of them come with an output board (290295929282). Does this get me anything other than a Type-N output and a mating connector for the RF d-sub? Why is this one cheaper than just a rubidium? A programmable frequency output, such as this one (eBay item 290301888238), might be useful. Is it worthwhile or more trouble than it's worth? Are there any gotchas I should be aware of? Thanks, Brent ___ 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] SparkFun Status
At 10:00 AM Mountain Standard Time, SparkFun is showing only 7106.39 of the 100K given away. Of interest to Time Nuts is that their clock is about 15 minutes slow; it shows that the giveaway has been active for 45 minutes, not a full hour. ___ 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: Spectrum Analyzer
I'm thinking of buying a spectrum analyzer and would like to know what Time Nuts recommend. My requirements are fairly simple: 3GHz Max frequency or higher Either GPIB or Ethernet interface for control and data capture Not much larger than an average desktop computer. Portable is nice but not necessary. Preferably under $3000. I thought about building Scotty's Spectrum Analyzer or Poor Man's Spectrum Analyzer, but decided I would rather buy one then build one. I have an HP 141T but I am looking for something more modern. One of my uses will be looking at C and Ku band satellite signals (down converted to 950-2050 MHz). I'll also be using it to look at various RF data links from 433 MHz to 2.4 GHz. Thanks, Brent ___ 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] Clock Project Help
There is an article in Circuit Cellar magazine that you need to read. It is Time Server Design: Synchronize with the WWVB Time Code. It is in the Nov 2008 issue (#220). You can buy the article at [1]http://www.circuitcellar.com/magazine/220.html for $1.50. Although it is the opposite of what you want to do (it acts as an NTP server), the article has lots of useful information. I vaguely recall that they also had an article very close to what you want, possibly in 2007. If I remember correctly it was a combination alarm clock/MP3 player that got the time using NTP. If it wasn't in Circuit Cellar then it was in Nuts Volts magazine [2]http://www.nutsvolts.com/ . Nuts and Volts is more beginner oriented than Circuit Cellar. If you want a microcontroller with an OLED display look at Luminary Micro Stellaris LM3S811 Evaluation Kit [3]http://www.luminarymicro.com/products/stellaris_811_evaluation_kits. html . You can get them from Digi-Key for $49. It doesn't have ethernet but it does have USB. Add one of the internet-on-a-chip boards from Microchip or Wiznet and you're done. I just found out Circuit Cellar is sponsoring a contest with $15000 total prize money for cool designs using the Wiznet W7100. You can get an eval board with LCD display for $49. I think it would be ideal for your project. [4]http://www.circuitcellar.com/newsletter/1009.htm I'm not affiliated with Circuit Cellar in any way other than as a subscriber. Most of what I know about embedded systems I learned from reading the magazine. They even have Time Nuts related articles: Microcontroller Clock-Locking: Frequency Reference Synchronization in the Jan 2009 (#222). Brent References 1. http://www.circuitcellar.com/magazine/220.html 2. http://www.nutsvolts.com/ 3. http://www.luminarymicro.com/products/stellaris_811_evaluation_kits.html 4. http://www.circuitcellar.com/newsletter/1009.htm ___ 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] GPIB on HP5382B counter
I'm out of practice with C, but shouldn't viScanf(vi, %t, buf); be viScanf(vi, %t, buf); Brent Jerome Peters wrote: I'm still trying to get the HP5328B counter to work with GPIB. I don't have any problems talking, however I can't receive data. I think the basic (HP/Agilent) hardware/software are ok, with a similar type of program I am able to send/receive to a 34401 Digital Multimeter. It seems like it should be pretty straight forward to implement but I can't fi gure out where I'm going wrong. There is a test oscillator driving the counter at ~5MHz, The Oscillator drifts a bit, so I can see every time it captures a ne w measurement. The counter is not in talk only mode ___ 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] DC-DC converter
Digi-Key http://search.digikey.com/scripts/DkSearch/dksus.dll?Detailname=102-1690-ND Part #102-1690-ND 9-36V in, 48V 1.04A out $85.46, in stock 9-pin module Joseph Gray wrote: Does anyone know where I can get an inexpensive 12VDC to 48VDC converter to power one of my Z3801A's? I can find 12VDC to 24VDC units, like this one at Jameco: http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1storeId=10001catalogId=10001productId=212514 Thanks. ___ 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] HP 5328 PSU nightmare... Or stupid engineer, you decide...
I'm not familiar with this particular instrument, but a standard technique for linear power supplies is to hook it up to a variac. This lets you turn down the line voltage so you can do some measurements without smoking the system. Brent Douglas Wire - PUPCo Studios wrote: Good day everyone and thank you all for hosting this wonderful community and allowing me to participate. I have several HP5328 with the “really- nice” newer 10811-x Oscillators in them. I have found while I have used the good old gold trace reliable HP instruments all of my life, these units have been especially difficult. The first unit the 4500uF electrolytic’s went bad and produced essentially a dead short; an easy enough repair for me to not only track down in minutes, but it only takes a straight bit screwdriver to fix in seconds! Now our second unit has been giving me fits and while I would agree 100% with one of the posts I saw here about how well HP did not only with their schematics, but also the wonderful troubleshooting flow charts usually make repairs on any of their old units a breeze. Sadly I have a unit here that is giving us fits! It is a PSU issue and not related to the Motherboard or any of the cards as I tested it with everything unhooked/ unsoldered and still got the same result. It is quite similar to what we see when we get an old HP unit that has a fried cap and is darn near creating a short to ground, but alas I simply cannot find the problem (I am sure it is starring me in the face is and I just can’t see it…) What I am seeing is super high current flow through the R1 (I believe, but HP’s every unit I have ever serviced had.47Ω resistor, NOT a 22-Ω as is stated in the schematic…) that leads to F1. The troubleshooting is complicated by the fact that unless I want to smoke that heavy duty, relatively close tolerance resistor, I cannot even check voltages anywhere for it will blow the fuse or if I put a slow blow to try and catch some measurements in a second or two, well that is not very feasible either. If I had to guess, I would say it has either a cap that has fried, outside chance of a transformer issue, or the way this thing reacts, pretty well an effective dead short somewhere, but I will be damned if I can find the problem anywhere. I replaced the bad and 4500uF caps as well as the rectifier, wondering if part of it had blown with no change in its issues. One cannot follow the flow cart to much of anything other than boxes that say look for a short, but so many areas one tests even on a perfectly working unit come clear down near the zero Ω point even when they are operating correctly. I apologize if 1) this is not a clear email that anyone can easily understand and 2) I almost feel embarrassed to ask anyone for advice from their practical experience, for I feel as If I should easily be able to get to the bottom of this in a matter of minutes with the wonderful data HP provides us all for these old workhorses. So if anyone has run into a problem such as this in the past where working the flow chart only yields No, No, No - check for shorts and has any advice for how I might logically proceed, or what in fact you have found out in dealing with a similar problem, it would be of great help, as we need this in-service ASAP, but I guess I just cannot see the forest for the tress in front of me or something here… Any advise, suggestions would be greatly appreciated. I would like to become a more active participant here with all I can contribute, which hopefully soon should be a lot as I am doing some innovative timing and generation processes that I am relatively sure the outcome and data from derived from it could be of great benefit to the TIME- NUTS userbase here. Thanks and don’t be too hard on me for asking (what to me sounds like a stupid amateur question) but I am either too tired to reason correctly, or it is just one of those very pesky problems, that hopefully someone has identified before and might be able to enlighten us over. I am begiinign to wonder if a voltage regulator might be responsible, but I am at a loss at the moment and have not had enough sleep to properly think this repair through… Thank you again everyone! Warm regards, Douglas M. Wire, GED, FNA, PUPCo Studios, PUPCo Research Group ___ 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] Obscure terms
The amount of land a man and a mule can plow in one day. 43560 square feet 640 Acres=1 square mile Jim Palfreyman wrote: Sheez - I'm so glad we have metric!! Can I ask you US dudes a question? Do you know, without looking it up, what an acre is? It's such a commonly used term for measuring large areas, but I bet most don't know what it actually is. I only know because of Pink Floyd. We use a hectare which is 100mx100m. Very easy to visualise, work with and convert. Jim Palfreyman ___ 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] Prologix
Mike Feher wrote: A friend has a 5335A counter and bought a Prologix adaptor for it to collect data. He wrote the software and has had extremely good results. He offered to do the same for me utilizing my NI adaptor so I could use it for my various counters. Unfortunately he ran into problems and feels he needs a special version of basic in order to make my $500 NI adaptor work. I admit to my total lack of programming ability. I still use GWBASIC, and only to crunch heavy numbers. I have no idea how to interface any software to communicate with an instrument, and, maybe am too old to want to learn as it seems a lot of people do it on a regular basis already. If this becomes too difficult I may have to buy a Prologix unit from Abdul. While I am all for doing that, and I bought my NI before Abdul had his version going, I was also under the impression that if the Prologix can do it the NI can do it, but, not necessarily the other way around. My friend mentioned API calls, whatever they are. Any suggestions? Thanks - Mike Mike B. Feher, N4FS 89 Arnold Blvd. Howell, NJ, 07731 732-886-5960 Mike, You should have gotten the NI-488.2 CD with your GPIB card. On that CD are the dlls (Dynamic Link Libraries) to talk to the card. You can use the dlls in any language that supports dlls or ActiveX. Sorry to say, GWBASIC is not one of those languages. Visual Basic 6 works well and I've even done GPIB data acquisition directly into Excel using VBA (Visual Basic for Applications, Excel's macro language). VBA is part of Excel. Alternatively, you can get a free Visual Basic Express at http://www.microsoft.com/express/vb/ I haven't tried VB Express, but I think it will work. Normally, I do all my GPIB programming in LabVIEW. Brent ___ 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] Trimble Copernicus Leap Second
The start of the $GPZDA is specified to match the PPS output. Interesting that the others are one second slow. Any missing sentences were not sent. $GPZDA,235959.00,31,12,2008,,*6C $GPGLL,3507.53830,N,10631.28409,W,235958.00,A,A*75 $GPZDA,00.00,01,01,2009,,*6D $GPGGA,235960.00,3507.53830,N,10631.28409,W,1,11,0.98,01719,M,-022,M,,*59 $GPGLL,3507.53830,N,10631.28409,W,235960.00,A,A*7E $GPRMC,235960.00,A,3507.53830,N,10631.28409,W,000.0,000.0,311208,10.6,E,A*1C $GPZDA,01.00,01,01,2009,,*6C $GPGGA,00.00,3507.53830,N,10631.28409,W,1,11,0.98,01719,M,-022,M,,*52 $GPGLL,3507.53830,N,10631.28409,W,00.00,A,A*75 $GPZDA,03.00,01,01,2009,,*6E $GPGGA,02.00,3507.53830,N,10631.28409,W,1,11,0.98,01719,M,-022,M,,*50 $GPGLL,3507.53830,N,10631.28409,W,02.00,A,A*77 $GPRMC,02.00,A,3507.53830,N,10631.28409,W,000.0,000.0,010109,10.6,E,A*15 I was also listening to WWV at 5 MHz, but I missed the leap second by two seconds. I haven't listened to WWV in a long time; instead of the normal ticking sound, each tick was tripled--sort of a ti-tick tock sound. I know I wasn't hearing WWVH (no female voice announcements). Was I hearing some other time station or is that how WWV sounds now? Brent ___ 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] WWVB Outages?
Your outage matches what NIST shows: http://tf.nist.gov/tf-cgi/wwvbgraph_e.cgi?5482602 Brent Tom Van Baak wrote: Greg, It happens now and then; no big deal. NIST is very good about logging these events for us. For recent (and past 7 years) see: http://tf.nist.gov/stations/wwvboutages.htm /tvb Have any of you noticed intermittent WWVB outages lately? I've been having that problem, every once in a while, the past month or more. For example, here in Colorado Springs, the 60 kHz signal disappeared sometime this morning before 11:42AM MST, and returned at 12:28PM MST. When this happens it kills my routine plot of my GPS-disciplined house standard against WWVB (that I use for in-house cross-checking / confidence purposes). I'm using a Kinemetrics Model 60TF WWVB Frequency Comparator / Receiver, that requires a continuous WWVB signal. (This is unlike the consumer Atomic Clocks that the public use; those kinds of WWVB-locked clocks do *not* require a continuous on-air signal, but rather flywheel in between scheduled locks a few times per day, as I understand it?) Cheers, Greg ___ 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] WWVB Outages?
You're welcome Greg. I'm glad I could post something useful to this list. I was exploring the WWVB website last night and discovered the page that lets you see WWVB reception in different parts of the country. For anyone interested, here's the gateway page that lets you see reception in Boulder, Gaithersburg, LaCrosse, and Santa Clara: http://tf.nist.gov/tf-cgi/wwvbmonitor_e.cgi Brent Greg Burnett wrote: Aha! Thanks Brent for that link! I wasn't aware that NIST had added that feature. Thanks again! Greg - Original Message - From: Brent Gordon time-n...@adobe-labs.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Friday, December 26, 2008 1:19 PM Subject: Re: [time-nuts] WWVB Outages? Your outage matches what NIST shows: http://tf.nist.gov/tf-cgi/wwvbgraph_e.cgi?5482602 Brent Tom Van Baak wrote: Greg, It happens now and then; no big deal. NIST is very good about logging these events for us. For recent (and past 7 years) see: http://tf.nist.gov/stations/wwvboutages.htm /tvb Have any of you noticed intermittent WWVB outages lately? I've been having that problem, every once in a while, the past month or more. For example, here in Colorado Springs, the 60 kHz signal disappeared sometime this morning before 11:42AM MST, and returned at 12:28PM MST. When this happens it kills my routine plot of my GPS-disciplined house standard against WWVB (that I use for in-house cross-checking / confidence purposes). I'm using a Kinemetrics Model 60TF WWVB Frequency Comparator / Receiver, that requires a continuous WWVB signal. (This is unlike the consumer Atomic Clocks that the public use; those kinds of WWVB-locked clocks do *not* require a continuous on-air signal, but rather flywheel in between scheduled locks a few times per day, as I understand it?) Cheers, Greg ___ 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.
