Re: [time-nuts] Trimble Thunderbolt error

hol...@hotmail.com said: > I find it hard to believe that only time-nuts GPSDOs saw any problems. Has anybody seen troubles on other than TBolts? > Will be interesting to see... Yup. -- These are my opinions. I hate spam. ___ time-nuts mailing

Re: [time-nuts] Trimble Thunderbolt error

I was looking to the frequency periods for 110V 60Hz main for that time: http://www.patoka.org/OCXO/main.png http://www.patoka.org/OCXO/main2.png Could be coincidence. But its noticeable events at Feb 00:15 UTC and Feb 14 01:30 UTC. The MCU counter referenced by regular OCXO (its not

Re: [time-nuts] HP Reliability

On 2/14/2016 11:20 AM, William H. Fite wrote: They don't wonder; they know very well. But they're stuck. Consider oscilloscopes. Why pay for a Keysight or Tectronix or LeCroy or, God forbid, a Rohde & Schwarz when, for the vast majority of applications, a Rigol will give you everything you

[time-nuts] Trimble Thunderbolt error

I filed an outage report with NAVCEN via their web site and got an email back asking for more info (which I supplied). I got the impression that they were not aware of what was going on. Googling around also does not show any official reports of problems. Rather surprising considering the

Re: [time-nuts] HP Reliability

HI I can indeed think back to the 70’s and at least somewhat earlier than that. Without naming names (and getting everybody mad), there is a pretty long list of companies that had a good thing going through the 50’s and 60’s. I worked for several of them. Life was good. Big money was made in

Re: [time-nuts] LIGO detects gravitational waves

Hi PHK, everyone, On 2016-02-14 0:30:22, Poul-Henning Kamp wrote: In message <1E75A9592178425ABD11390EB725D060@pc52>, "Tom Van Baak" writes: Yes, the interferometer is 4 km in length but they bounce the beam back and forth 400 times so the effective length is more like 1600 km. They

Re: [time-nuts] HP Reliability

Up to roughly the mid-1970s, even ordinary mortals, HP employees, could fly first class if you were traveling on company business for HP and the flight was longer than 3 hours. Even I, an lowly process engineer, included in a shopping trip "back east" to Boston and Philly, got to fly first

[time-nuts] Power grid

http://fnetpublic.utk.edu/gradientmap.html Lester B Veenstra MØYCM K1YCM W8YCM les...@veenstras.com Physical and US Postal Addresses 5 Shrine Club Drive 452 Stable Ln RFD Mail Keyser WV 26726 GPS: 39.336826 N 78.982287 W (Google) GPS: 39.33682 N 78.9823741 W (GPSDO) Telephones: Home:

Re: [time-nuts] HP Reliability

I was never with HP but I bought (using Hughes Aircraft and US government money) megabucks worth of HP Instruments. The whole facility bought millions more. The local Tucson HP sales office had a salesman assigned just to Hughes. They showered us with catalogs, app notes, training programs,

Re: [time-nuts] Trimble Thunderbolt error

Rob S. writes: > > Around 1/2 an hour ago ( I wasn't in front of mine when it happened ) at > roughly 00:45 UTC the Mates went into "holdover" mode and reported "no > Sats". I have just checked mine and it is reporting the same.. > At about 0045 Z 14FEB16 my Navman TU60

Re: [time-nuts] HP Reliability

I was with HP 1972-79, when it was still a great company. The vertical integration was such that there was a joke about HP plant site landscaping, which always seemed to feature ferns. The reply was , "We're making our own coal!" We not only had packaging engineers but made our own cabinets.

Re: [time-nuts] HP Reliability

When in the field and one of those cheap 'disposable' instruments fail and pointed questions are asked That's when you miss the quality of the old HP gear And I still use the old pre Carly gear precisely because it can be trusted to work in adverse conditions even though one needs to wash

Re: [time-nuts] Trimble Thunderbolt error

manu...@artekmanuals.com said: > A novice to the GPS community why are (apparently)only the Trimble units > affected? It's not hard to imagine obscure firmware bugs/features that only show up in some devices. Making a GPSDO adds another opportunity for quirks on the handoff between the GPS

Re: [time-nuts] HP Reliability

I personally knew Howard Vollum for many years and at one time R sold the TEK products in Europe ! Ulrich Rohde Sent from my iPhone > On Feb 14, 2016, at 2:28 PM, "Gregory Muir" wrote: > > Having been in the product design world (both MIL and commercial/medical) for >

Re: [time-nuts] Trimble Thunderbolt error plot

Ben et all Business as usual here in Florida at 18:32 on Z3801A Dave NR1DX On 2/14/2016 1:33 PM, Ben Hall wrote: Interesting. My Z3801A got really angry a bit ago but never lost satellites: (plus attached if this list doesn't block

Re: [time-nuts] HP Reliability

Quite often it works, but sometimes it does not, not to long time ego I had to investigate one non-linearity case with a high mode QAM signal, there was something, what not supposed to be there, the only spectrum analyzer which had enough dynamic range was one from Rohde, 73 K6UHN Alex On

Re: [time-nuts] HP Reliability

Totally agree. Disposable and cheap. Plus the companies don't intend to stay in business but get picked up by some larger company Still amazing for little you can pick up this modern gear and it happily communicates with your laptop generally speaking. Still like my 400lbs of test HP and Tek

Re: [time-nuts] HP Reliability

The ex-CEO of whom you speak was never over the instrument business. The Agilent spinoff occurred just before that reign. Many people seem to have that mistaken notion. >From Tom Holmes, N8ZM > On Feb 14, 2016, at 2:28 PM, Gregory Muir wrote: > > Having been in the

[time-nuts] HP Reliability

They don't wonder; they know very well. But they're stuck. Consider oscilloscopes. Why pay for a Keysight or Tectronix or LeCroy or, God forbid, a Rohde & Schwarz when, for the vast majority of applications, a Rigol will give you everything you need at 1/N the cost? The hugely expensive,

Re: [time-nuts] HP Reliability

HP's greatest advantage of old was being the largest and best vertically integrated technology company as innovations in one line of business were often applicable to others.This was right down to things as prosaic as packaging and or hybrid circuit design Now Keysight is just another mid

Re: [time-nuts] Trimble Thunderbolt error plot

On 2/14/2016 11:57 AM, Mark Sims wrote: Attached is a Lady Heather plot of the "event". Note that there were a couple of brief places during the outage where one satellite was tracked. Interesting. My Z3801A got really angry a bit ago but never lost satellites:

Re: [time-nuts] HP Reliability

Having been in the product design world (both MIL and commercial/medical) for most of my life, I developed a very deep respect for HP quality and reliability over the years. It wasn't uncommon for management to peek into the lab and find me poking around inside a piece of HP equipment to see

Re: [time-nuts] Trimble Thunderbolt error

i am located in switzerland. i checked tonight's log of my lucent ks-24361. it had perfect satellite reception during the whole night. but: i stopped logging a TI-measurement this morning because it was messed up. the reference is a Miller Simple GPSDO, the DUT a decently stable rubidium

Re: [time-nuts] Trimble Thunderbolt error

OK. I was starting to suspect that. Already made a call. They keep producing work for us. Cheers, Magnus On 02/14/2016 01:02 PM, Tom Van Baak wrote: This NANU just arrived: From: https://celestrak.com/GPS/NANU/2016/nanu.2016012.txt NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2016012 NANU

Re: [time-nuts] HP Reliability

HP built their reputation for quality and reliability with test equipment. Computers were always considered a bit weird (in a nice way, in the case of handheld calculators) but printers have followed the consumer race to the bottom. It's sad to hear that the instrument division are no longer

Re: [time-nuts] HP Reliability

My bet is that the split between Medical and Test Equipment is to facilitate the eventual sale of one or the other division. As for reliability I have mostly HP and Tektronix in my stable with an odd Racal and Boonton piece here and there. The Boontons never fail ( arguably much simpler) but

Re: [time-nuts] Trimble Thunderbolt error

Interesting my Z3801A here in Florida reports no hold over errors for the last 72 hours A novice to the GPS community why are (apparently)only the Trimble units affected? Dave NR1DX On 2/14/2016 7:02 AM, Tom Van Baak wrote: This NANU just arrived: From:

Re: [time-nuts] HP Reliability

A few clarifications: Before 1999, HP had a Medical Division that made equipment you saw in hospitals and a Scientific Instrument Division that made chemical analysis equipment used in medical laboratories (and also other laboratories). IIRC, both began as acquisitions. The Agilent spin off in

[time-nuts] Trimble Thunderbolt error plot

Attached is a Lady Heather plot of the "event". Note that there were a couple of brief places during the outage where one satellite was tracked. ___ time-nuts mailing list -- time-nuts@febo.com To

Re: [time-nuts] HP Reliability

We have had mixed results with HP/Agilent/Keysight over the years. Our experience with their repair and customer service has been less favorable. One area where my experience has been unfavorable has been with the Genesys software. We bought it back when it was still owned by Randy Rhea, and I

Re: [time-nuts] Trimble Thunderbolt error

At 12:59 AM 2/14/2016, Hal Murray wrote: newell+timen...@n5tnl.com said: > My tbolt shows a massive loss of sats starting around 00:15 through 01:56. Where are you located? Arkansas. I have crappy antennas so holdover is common. It's been good weather Outdoor antenna, but so-so

Re: [time-nuts] Trimble Thunderbolt error

I will say its odd that lately there have been 2 screw ups in less then a month. Really odd. I was thinking that perhaps the issue had been a pocket jammer. Those will have an affect on a area. In the states truck drivers buy and use them. But it looks like the birds were messed up. Regards Paul

Re: [time-nuts] Trimble Thunderbolt error

I saved my LH screen just as the period of seeing no satellites ended with one coming into view at the bottom, and again maybe an hour and a half later. In between LH reported "No Almanac" at some point. Whatever was being done must have been fairly major! Dan

Re: [time-nuts] Trimble Thunderbolt error

Independent reports on GPS errors on the app_rpt mailing list, around the time frame you're mentioning in California. Those guys use GPS to train voting radio transmitters. They asked me to post on their behalf, as I am subscribed to both lists. On 14 Feb 2016 3:02 pm, "Mark Sims"

Re: [time-nuts] Trimble Thunderbolt error

newell+timen...@n5tnl.com said: > My tbolt shows a massive loss of sats starting around 00:15 through 01:56. Where are you located? I'm in Silicon Valley. Both of my TBolts went into holdover about 0:15 UTC and stayed there until 2:15. One recovered enough to reset the counter about half

Re: [time-nuts] HP Reliability

Hi, Spent the flight back from PTTI next to a HP, then Agilent medical guy. Aparently the medical stuff did not go into Keysight, they remain Agilent. -- Björn > Hi, > It is rather depressing to me to hear RK and others remark about the > unreliability of HP test equipment. > There is one

Re: [time-nuts] HP Reliability

On 14 Feb 2016 09:04, "Perry Sandeen via time-nuts" wrote: > > Hi, > It is rather depressing to me to hear RK and others remark about the unreliability of HP test equipment. > There is one area where they had outstanding equipment. I have a friend with a fairly large lab.

Re: [time-nuts] LIGO detects gravitational waves

Peter, The concepts of "event horizon" and "singularities" is somewhat disputed now. The "event horizon" is just that radius where the gravitational pull is strong enough for light to bend down. It's not the "surface" of the black hole itself. What is interesting here is where the "surface"

Re: [time-nuts] Trimble Thunderbolt error

This NANU just arrived: From: https://celestrak.com/GPS/NANU/2016/nanu.2016012.txt NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2016012 NANU TYPE: GENERAL *** GENERAL MESSAGE TO ALL GPS USERS *** Users may be experiencing a potential time transfer anomaly. If you are experiencing any issue

Re: [time-nuts] HP Reliability

Hi, Rather, it was because Agilent was known for it's fine medical stuff that the instrument part didn't fit in and put into a separate company. Similarly since HP was known for its computers, printers and scanners, the medical and instrument parts didn't fit into the HP brand. In the

[time-nuts] HP Reliability

Hi, It is rather depressing to me to hear RK and others remark about the unreliability of HP test equipment. There is one area where they had outstanding equipment. I was involved with repairing HP medical equipment for 25 years and it was awesome stuff. This was the same info I got from other

[time-nuts] Cheap GPS OCXO's

Hi, One comment posted a while back warned that if the Morion OCXO's reached the limit of their EFC range the could not manually re-tuned as others are. That said, the newer ones posted seem to be using Trimble OCXO's. Regards, Perrier ___ time-nuts

Re: [time-nuts] LIGO detects gravitational waves

I am curious about the final stages. When they are far apart they are outside of each others event horizon (the boundary from which nothing can escape). As they wind down the event horizons will merge but not be spherical. They are hot spherical since the two singularities at their center

Re: [time-nuts] Trimble Thunderbolt error

Same here for me in central California near the coast(SLO county). My Tbolt lost all satellites all at the same time, for 100 min @ ~5:30 PM PST. Then just as suddenly all came back on line, with no input from me. A truly unique experience for this Tbolt which runs pretty much continuously. LH