[time-nuts] Brooks Shera's GPS standard or HP Z3801A??
I was going to build the GPS reference by Brooks Shera http://www.rt66.com/~shera/index_fs.htm and have bought the PCB and started populating it (not much yet). But now I am wondering if buying a used Z3801A might not be a better idea. My thoughts are: 1) Cost - the Z3801A will probably cost less than buying all the parts for Brook's Standard. This is especially so, with me in the UK, where shipping charges on lots of small items from the USA soon add up. 2) Medium term stability - the double oven in the Z3801A might be more stable than an HP 18011A. 3) Flexability - Brook's standard can be customised to whatever you want. 4) Long term servicability - if one builds the standard oneself, one is far more likely to be able to debug it if things go wrong. One can buy a few of the chips, for spares, just in case one dies and becomes hard to get. The chips on the board are not that expensive. 5) Jitter on GPS. 6) If one needs to buy a manual on the Z3801A, that will add to its cost. Any other thoughts -- Dr. David Kirkby PhD CEng MIEE, Senior Research Fellow, Department of Medical Physics, Mallet Place Engineering Building, Gower St, University College London, London WC1E 6BT. ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Brooks Shera's GPS standard or HP Z3801A??
- Original Message - From: Dr. David Kirkby [EMAIL PROTECTED] Subject: [time-nuts] Brooks Shera's GPS standard or HP Z3801A?? 6) If one needs to buy a manual on the Z3801A, that will add to its cost. When I bought mine from BuyLegacy 3 years ago it came with a printed manual... I have since found it as a pdf. I can send the pdf if you like. It's 1MB. 73, Mike, N1JEZ A closed mouth gathers no feet ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
[time-nuts] hello time-nuts! looking for a fts 4060 manual
i'm new to this mailing list and a collector of timekeeping instruments mainly in the field of vinatge patek philippe quartz 19 inch rack models like early 60ties, 70ties MI,MS or T3 if that does ring a bell to the one or the other among you. (i can mail pics in case anybody is interested) i have the request for a manual for a datum fts 4060 cesium frequency standard with led option. i bought it online and there wil be no material with it, so i'm trying this way to gather information. can anybody of you help? best regards from zuerich, switzerland sebastian -- +++ Sparen beginnt mit GMX DSL: http://www.gmx.net/de/go/dsl ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
[time-nuts] HP/Agilent and manuals...
Just thought I would post a note on what is happening with websites hosting HP/Agilent manuals. It seems that Agilent has decided to rein in on websites that are hosting copies of HP/Agilent manuals. They have sent take-down notices to BAMA, and ebay, amoung others. They seem to be most interested in the sites that host low quality copies, or are profiting off of CDs of copies. There is some skuttlebutt that Agilent is going to put all of the older manuals up as pdf's on their website...Let's hope that is true. But to those who are hosting HP/Agilent manuals, and copies of HP/ Agilent materials, they may be intouch. -Chuck Dr. David Kirkby wrote: Mike Seguin wrote: - Original Message - From: Dr. David Kirkby [EMAIL PROTECTED] Subject: [time-nuts] Brooks Shera's GPS standard or HP Z3801A?? 6) If one needs to buy a manual on the Z3801A, that will add to its cost. When I bought mine from BuyLegacy 3 years ago it came with a printed manual... I have since found it as a pdf. I can send the pdf if you like. It's 1MB. ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] HP/Agilent and manuals...
Chuck Harris wrote: Just thought I would post a note on what is happening with websites hosting HP/Agilent manuals. I have received a definative statement from Agilent on this. I will NOT post full details at this time, until I have received confirmation of permission from Agilent. But basically. 1) I asked for permission to distribute manuals for free on the web. 2) Was denied that, but they will grant me permission to distribute them for obsolete products by paper or CD - even if I charge. 3) I need to sign a document, return it to Agilent, and they will send me permission by a PDF file. I don't have to pay them anything. 4) I have signed the document, returned it to Agilent by airmail, and will await their confirmation. Sorry I am not willing to go into further details just as this minute. But when I have received confirmation, I will post further details. -- Dr. David Kirkby PhD CEng MIEE, Senior Research Fellow, Department of Medical Physics, Mallet Place Engineering Building, Gower St, University College London, London WC1E 6BT. ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
[time-nuts] FTS 4060 Op Manual
Quick note to my fellow nuts I have posted the Operations manual for the FTS 4060 C-Beam at the following address www.to-way.com/tf.html I will try and add other interesting items as I have time. Best to all, Had, K7MLR ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
[time-nuts] Re: HP 10811A vs 10811-60111
Are you saying that some HP- counters/timers/whatever would ship with an 10811A, whereas another instrument with the same model number and options ordered would ship with a different oscillator? It's hard to say. I've seen mil-spec versions of the 5238A shipped with a EGG 10811 clone. It is not impossible that HP would ship whatever met spec or better in a counter. But more importantly the other reason it's hard to know is that the 10544 and 10811 are 20 to 30 years old now. So when you get an instrument with an OCXO there's no telling what is original and what has been board swapped over the years. In any sort of commerical or university lab, you have to expect that OCXO or any other removable parts are swapped around as needed. Also if an eBay seller has spare parts and needs to sell a functional counter, he will install whatever works. Buying gear for 10% to 1% of original cost on eBay is wonderful; but one of the few tradeoffs is certainty. You can't know, and often the seller can't know, just how easy or how hard a life a piece of electronics has had in the decades before. Nor can you know if all the parts inside a piece of gear are original. So we sort of take what we can get and measure it to see what we got. /tvb ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Brooks Shera's GPS standard or HP Z3801A??
In message [EMAIL PROTECTED], Tom Van Baak writes: Don't forget that a PRS10 Rb from eBay and a Oncore M12+T from synergy-gps.com would be both cheaper and more stable. Good point. Has someone posted a Z3801A vs. PRS10/M12+ comparison? I have a lot of data on the PRS10 but haven't put an M12+ to it yet. I should add that with an UT+ the sawtooth has a tendency to throw the PRS10s PLL off kilter, even with the 256 second averager (because the sawtooth does not necessairly average out to zero in that timeinterval). Even then, the PRS10+M12+T is by far the best bang for the buck I can think off. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | 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 https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
AW: [time-nuts] FTS 4060 Op Manual
Does anyone have diagrams for the cesium module? Hubert DB7ME -Ursprüngliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Had Gesendet: Montag, 25. April 2005 19:24 An: time-nuts-febo.com Betreff: [time-nuts] FTS 4060 Op Manual Quick note to my fellow nuts I have posted the Operations manual for the FTS 4060 C-Beam at the following address www.to-way.com/tf.html I will try and add other interesting items as I have time. Best to all, Had, K7MLR ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Telling UT+ to shut up...
Hi John: As far as I know all you can do is see what messages are being send and turn each one off. Have Fun, Brooke John Ackermann N8UR wrote: Is there a way to tell a Motorola UT+ that is outputting some unknown set of messages in binary format to stop all output? I don't want to do a complete reset, just have the output messages stop so I can start my own polling from a known state. I don't see any indication in the command reference of a way to do this, but I suspect there must be. Thanks, John ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
[time-nuts] RE: [tacgps] Telling UT+ to shut up...
John, Reset is really about the only way to do it unless you can see what messages are coming out and disable them one at a time. If you have LOTS of time you can just cycle through all the messages and shut them off, but resetting is probably the easiest thing to do. Randy Warner Senior Applications Engineer Synergy Systems, LLC -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John Ackermann N8UR Sent: Monday, April 25, 2005 3:27 PM To: tacgps@lists.tapr.org; Discussion of precise time and frequency measurement Subject:[tacgps] Telling UT+ to shut up... Is there a way to tell a Motorola UT+ that is outputting some unknown set of messages in binary format to stop all output? I don't want to do a complete reset, just have the output messages stop so I can start my own polling from a known state. I don't see any indication in the command reference of a way to do this, but I suspect there must be. Thanks, John ___ tacgps mailing list tacgps@lists.tapr.org https://lists.tapr.org/cgi-bin/mailman/listinfo/tacgps ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Book: Phase Noise in Signal Sources by Robins.
On Mon, 25 Apr 2005, David Kirkby wrote: I won an auction on eBay for a book PHASE NOISE IN SIGNAL SOURCES, IEE, by W P ROBINS. Yes I have this book and it has been helpful but not always correct. I do recommend owning it though. Jeffrey Pawlan ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] RE: [tacgps] Telling UT+ to shut up...
Randy Warner wrote: John, Reset is really about the only way to do it unless you can see what messages are coming out and disable them one at a time. If you have LOTS of time you can just cycle through all the messages and shut them off, but resetting is probably the easiest thing to do. Randy Warner Senior Applications Engineer Synergy Systems, LLC Thanks, Randy -- though that's a painful answer! By resetting, do you mean a power cycle, or the system-reset command, which seems like the nuclear option because it appears to lose all the settings. Thanks, John ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Q: HP-IB / 5370A pdfs
At 07:07 PM 4/25/2005 -0400, Mike S wrote: 2) Anyone have a .pdf of the user/service manual? Mine, I believe, is a fairly late production (series 2311) for the A. If not, I suppose I'll wait and see what Agilent is up to with the old docs. I have a 5370A book on hand. It's on load from a friend, so I can't risk destroying it for a full scan, but if you need something in particular perhaps I can help out. -- newell N5TNL ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Q: HP-IB / 5370A pdfs - Agilent 82357A USB / GPIB interface
I've been using an Agilent 82357A USB interface. Plenty fast enough for most applicationa and a lot easier to move between machines including laptops... Found mine on ebay for about half price though they seem quite rare. - Original Message - From: Mike S [EMAIL PROTECTED] To: time-nuts@febo.com Sent: Monday, April 25, 2005 4:07 PM Subject: [time-nuts] Q: HP-IB / 5370A pdfs As the proud new owner of a 5370A, a couple of requests of the list: 1) What do you use/recommend for an HP-IB/IEEE-488 interface for a PC? (PCI bus). It looks like these things go for more than I paid for the 5370A! Linux compatibility? 2) Anyone have a .pdf of the user/service manual? Mine, I believe, is a fairly late production (series 2311) for the A. If not, I suppose I'll wait and see what Agilent is up to with the old docs. TIA, Mike ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
RE: [time-nuts] Q: HP-IB / 5370A pdfs
As the proud new owner of a 5370A, a couple of requests of the list: 1) What do you use/recommend for an HP-IB/IEEE-488 interface for a PC? (PCI bus). It looks like these things go for more than I paid for the 5370A! Linux compatibility? I use the linux-gpib drivers and library with good success (within reason...). The PCI bus cards are pricey, but if you still have an ISA bus machine around, the NI or HP cards go for a song on eBay, and ISA is plenty fast enough for the stuff we're doing. If you're willing to stick with Win9x, DOS, or Linux. The ISA cards aren't supported under XP or Win2K, and they will not work in the next PC you buy or build, because ISA slots have gone the way of the S-100 bus. I do like the idea of using the RS-232 dongles whenever/wherever they are adequate for the job. But if you want to use NI hardware under Windows, be sure to check http://www.ni.com/support/gpib/versions.htm before doing any heavy bidding. -- john KE5FX ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
