Re: [time-nuts] DCF77 clock with UTC display
Folks, I have one that displayed CET time so I opened it and discover a suspicious set of solder-shortable pads I shorted them (few trials) and bingo !!! It displays now in UTC. It even shows a small utc symbol on the display. It is a stabo funktimer II But stabo no longer has them on their web site... (it was 10 years ago I got it) More, I'm out of the official DCF77 range and it receives beautifully (I believe it is due to the fact they used a big rod ant) If it helps the find one I can take a picture of mine. Luis Cupido. ct1dmk. Rob Kimberley wrote: You could try Meinberg in Germany. www.meinberg.de Rob Kimberley -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of AL1 Sent: 06 June 2010 4:42 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] DCF77 clock with UTC display Hi Giuseppe, i remember that Elektor had such a description; but i don' know when, i am looking for it... Alain Bouchet F4GBC - Original Message - From: Giuseppe Marullo giuse...@marullo.it To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, June 06, 2010 1:55 AM Subject: Re: [time-nuts] DCF77 clock with UTC display DCF77 is transmitted in CET/CEST and so receivers generally just display the received data with some allowing other TZ offsets as it can be received in the UK for example. I also lucked out when looking for one where daylight savings adjustments could be removed . Mike, exactly what I am experiencing. I am starting to believe that I will have to ask to ham radio manifacturers (like MFJ but they are US based) until they will develop a specific product, or I will have to build it myself, like a DCF77 receiver with some ehm, custom handling of the summer time... I can't believe there is no such need for aviation or other fields. Giuseppe Marullo ___ 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.
Re: [time-nuts] Agilent Flat Rate repairs
If you decide to let Agilent repair your instrument be aware that flat rate doesn't necessarily mean what you think it does. We sent a network analyzer to them under the flat rate repair program and we were told that certain repairs, anything expensive, wasn't covered and that the repair would be considerably more. I used to think that HP/Agilent's repair service was first rate. The last few times we used them changed my mind. Still, certain things can only be successfully repaired by them because they have proprietary software. ___ 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 3458A schematic/service manual request
Jeff, I have a copy of the component level information packet that I bought from Agilent last year. It contains no troubleshooting information like you might find in other HP service manuals, but it does contain complete schematics, layouts, and parts lists for the entire instrument. HP never intended the 3458A to be field-repairable, so you're basically on your own. Randy. --- On Mon, 6/7/10, jeffh...@comcast.net jeffh...@comcast.net wrote: From: jeffh...@comcast.net jeffh...@comcast.net Subject: Re: [time-nuts] HP 3458A schematic/service manual request To: Discussion of precise time and frequency measurement time-nuts@febo.com Date: Monday, June 7, 2010, 10:56 PM Mark, Have you, or anyone else, ever looked at to this manual to see how much service info is in it? Jeff - Original Message - From: Mark Sims hol...@hotmail.com To: time-nuts@febo.com Sent: Monday, June 7, 2010 10:28:00 PM GMT -06:00 US/Canada Central Subject: [time-nuts] HP 3458A schematic/service manual request I beleive that you want HP manual 03458-90033... Component Level Information Packet... Not available for download... $147 to buy _ The New Busy think 9 to 5 is a cute idea. Combine multiple calendars with Hotmail. http://www.windowslive.com/campaign/thenewbusy?tile=multicalendarocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_5 ___ 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.
Re: [time-nuts] HP 3458A schematic/service manual request
another shot is to call/email a few calibration/met outfits. if they have work on a few 58A, they may be able help at least narrow down what is wrong. you will have to use your negotiating skills on what you may have to pay. it has worked for me in the past. -pete On Mon, Jun 7, 2010 at 5:54 PM, Robert Benward rbenw...@verizon.net wrote: Hi Jeff, I checked the Agilent website, and I assume you did also. There is no schematic to be had. What I have discovered with Agilent, is that certain instruments are made by particular divisions. Some of those divisions consider those schematics to be proprietary and they will not release them now, not in the near future, and may never be released. I ran across this with an LCR meter I bought on EBAY. I tried to get schematics, as I thought he repair would be relatively simple. It passed self test, appeared functional, but very erratic. I thought the problem would be within the first few components near the front end. I called the factory more than once, but the line I got was exactly what I described above. I looked everywhere, but to no avail. I hope you have better luck than I did. Maybe you can find a parts unit on EBAY cheap. Bob - Original Message - From: jeffh...@comcast.net To: time-nuts@febo.com Sent: Monday, June 07, 2010 7:26 PM Subject: [time-nuts] HP 3458A schematic/service manual request Hi, I picked up a non-working 3458A at a swapmeet this weekend. It has err 202 Hardware Failure : Slave test-convergance. Assembly-Level Repair Manual says its a problem on the A1 board Does anyone have a schematic/service manual for this? Thanks Jeff ___ 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] Dallas NV-SRAM replacement? (in 3458A)
Speaking of the 3458A, it has three DS1235Y-150 non volatile SRAM on the CPU board. Each is a 32K x 8 bit, so there is a lot of info inside. As the useful life of those is in the order of 10 years and most 3458A a re now 10 to 20 year old, is there a possible replacement? Possibly with a more modern component? Also, of course it would be a good idea to read and save the contents of the SRAMs before replacing, but... is any custom data in them that cannot be rewritten with a complete recalibration? Possibly this argument has been discussed before, but I don't remember. Marco IK1ODO ___ 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 3458A CLIP manual
Message: 1 Date: Mon, 7 Jun 2010 23:26:13 + (UTC) From: jeffh...@comcast.net Subject: [time-nuts] HP 3458A schematic/service manual request To: time-nuts@febo.com Hi, I picked up a non-working 3458A at a swapmeet this weekend. It has err 202 Hardware Failure :?Slave test-convergance. Assembly-Level Repair Manual?says its a problem on the A1 board Does anyone have a schematic/service manual for this? Thanks Jeff Jeff and all -- I bought one of the so-called CLIP manuals after I bought my 3458. This manual was done under duress by HP in order to satisfy government requirements. The one I got has board layouts, parts lists, and schematics, all for the original version of the meter. It has no troubleshooting or other service information. It's a good thing to have if you need to know the value of a component or a part number. Beyond that, you're on your own. The Agilent $2500 bring it up to current standards deal is a very good deal, since it includes all parts and a calibration (which is worth $500 alone), and I recommend it if the fault is not obvious on the A1 board. I saw a 3458 from eBay that had an IC on the A1 board completely smoked and the board charred -- it also gave a 202 error... well, no kidding! Dick Moore ___ 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 receiver stuck at South Pole :)
[From last April. Garmin GPS-USB-18 (no x).] I think I've figured out what's going on. This is reverse engineering (guessing) by looking at the output. When the signal fades out, it remembers the most recent position and velocity. It does mark the following info packets as no-good. Yes, I could ignore the data, but I happened to plot it. It seems to update the position. Since this is my house, the velocity should be 0. Often it is. That's a boring case. It just keeps repeating the last position. But since the signal is fading out, the position is often quite a ways off. If the position on the previous slot was good, that turns into a large velocity. (When I started typing this in, it was off by more than 1 degree.) If the velocity has a N/S component and it doesn't recover the signal soon enough, it will eventually get to one of the poles. For me, that's happening several times a week. (I just noticed one that recovered at 88.464659.) It seems to be flying on a Mercator cylinder rather than a sphere. As you get closer to the poles, it still goes X meters per second E/W, but that gets translated into degrees which get smaller. If you plot latitude and longitude vs time, one is a straight line, the other turns into a curve. I've forgotten my spherical trig. What's the term for the change in direction as you fly a great circle route on a Mercator projection? This unit doesn't seem to be making that correction. It doesn't know how to fly over a pole. When it gets within a step of the pole, the N/S motion stops. It does know how to cross the international date line. I'm plotting the position every 64 seconds. As it gets near the pole, you get interesting aliasing effects as it wraps around the pole multiple times per step. -- These are my opinions, not necessarily my employer's. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Dallas NV-SRAM replacement? (in 3458A)
In message 20100608164407.a9783112...@mail.ebirds.it, Marco IK1ODO -2 writes: Speaking of the 3458A, it has three DS1235Y-150 non volatile SRAM on the CPU board. Each is a 32K x 8 bit, so there is a lot of info inside. As the useful life of those is in the order of 10 years and most 3458A a re now 10 to 20 year old, is there a possible replacement? Possibly with a more modern component? I replaced all the NVRAM's in mine last month, no issues. There are plenty of NVRAMs to be had as new. Also, of course it would be a good idea to read and save the contents of the SRAMs before replacing, but... is any custom data in them that cannot be rewritten with a complete recalibration? The CALRAM contains a number of magic counters, one of which is called destructive overloads that a calibration cannot possibly restore. But from a functional point of view: no. You can read out the memory with the undocumented MREAD command, but the CALRAM is protected by various tricks, so you cannot just use the MWRITE command to restore it. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] pm - re: Dallas NV-SRAM replacement? (in 3458A)
In message fbcmcl01b01fraqbc8w0009c...@fbcmcl01b01.fbc.local, Marco IK1ODO wr ites: I replaced all the NVRAM's in mine last month, no issues. There are plenty of NVRAMs to be had as new. that's good news. What have you used? TI's BQ4011YMA-70N and STM's M48Z12-70PC1 I soldered low profile sockets in to make it easier in 2020 or whenever... :-) You can read out the memory with the undocumented MREAD command, but the CALRAM is protected by various tricks, so you cannot just use the MWRITE command to restore it. So, have you read the RAM with an eprom-programmer, and then rewrote them, or simply replaced? I read and wrote them with a eprom-programmer, that was the easiest... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
