Re: [time-nuts] SRS FS700 questions

2014-05-03 Thread GandalfG8
Hi Stan Many thanks for the advice, I was a bit concerned about making any adjustments until I'd confirmed it at least appeared to be working correctly but I've just taken another look at the manual and can't see any reason why I shouldn't. One of my reasons for concern was that although

Re: [time-nuts] SRS FS700 questions

2014-05-04 Thread GandalfG8
True, but I haven't got that far yet, I'm just trying to establish for now whether or not it's doing what it should be to start with. Regards Nigel GM8PZR In a message dated 04/05/2014 13:51:43 GMT Daylight Time, p...@phk.freebsd.dk writes: In message , gandal...@aol.com writes: >Th

[time-nuts] OT -- AOL and Yahoo Email Warning

2014-05-06 Thread GandalfG8
Apologies for the off topic post but I suspect this will affect some other list members as well as those also using Yahoo groups, so thought it worth sharing. Following some recent email spoof attacks both AOL and Yahoo have revised their DMARC settings to "Reject". For anyone not familiar

[time-nuts] Trimble NTGS50AA DAC Voltage

2014-06-11 Thread GandalfG8
I don't recall seeing this mentioned here before but if it has been, or if it's just something everyone else has always taken for granted, then apologies in advance from a comatose brain cell for the wasted bandwidth. Until today I'd not previously seen either an NTGS50AA or an NTBW50AA wher

Re: [time-nuts] 58503A date code problem

2014-06-22 Thread GandalfG8
Date: Sat, 21 Jun 2014 13:06:19 -0400 From: Daniel Burch To: time-nuts@febo.com Subject: [time-nuts] 58503A date code problem Message-ID: Content-Type: text/plain; charset=UTF-8 Hi All, I have a HP/Symm 58530A that has the correct time, but date keeps defaulting to 1994, Nov, 4 after GPS L

Re: [time-nuts] WWVB remodulator update Sent twice but never made it through ...

2014-07-04 Thread GandalfG8
Hi Paul Although I can't see any evidence of your attachment when I check the archives, I thought I'd received a copy with your messages that were forwarded from the list on both occasions you sent it, unless what you're referring to now is a different file? What I received both times as an

Re: [time-nuts] Introduction and info about a Lucent RFTG

2014-07-05 Thread GandalfG8
Hi Denver When you refer to one "side" or the other, do you have the complete RFTG unit with the two modules? I only have the internals of the Rubidium module so would hardly claim to be an expert on these, or on much else for that matter:-), but as I understand it from the documentation th

[time-nuts] AOL problems again

2014-07-05 Thread GandalfG8
I've just received another excessive bounce notification from the list, again I'm assuming because AOL has taken to rejecting any message that's forwarded such that it indicates it's still from AOL but isn't. Switching to digest and/or just reading the posts online is one fix but just wond

[time-nuts] Austron 1120 octal based oscillator

2014-07-30 Thread GandalfG8
I've recently acqured an octal based 4.096Mhz Austron 1120 oscillator that physically at least is a close match to the unit shown in the data sheet on Didier's site. However, this one, model 1120-1FWT dated 1981, which was indicated as being ex aircraft, looks to have significant connection

[time-nuts] Trimble Resolution T firmware

2013-06-17 Thread GandalfG8
In January 2010 Trimble made firmware updates available for the Resolution T as well as for several other GPS modules to accomodate some changes to the GPS signal structure. The upgrade firmware provided for the Resolution T was version 1.17 and this is still the version currently available

Re: [time-nuts] Spectracom 8164 Hack?

2013-06-26 Thread GandalfG8
Hi Perrier It's a WWVB receiver, not Loran, with a built in phase comparator, hence the strip chart, that can be used to compare its own oscillator or a local input with WWVB, and is another unit affected by the WWVB changes. Those switches on the front panel select an output frequency pro

Re: [time-nuts] Austron 2100 HPIB/GPIB/IEE-488 cards

2013-06-26 Thread GandalfG8
Hi Iain, There's probably not too many of these floating about but it's a very straightforward circuit and the Motorola ICs are still available on Ebay, albeit probably all recycled, so building one on Veroboard or similar shouldn't be difficult. There's no programmable devices in the in

Re: [time-nuts] Austron 2100 HPIB/GPIB/IEE-488 cards

2013-06-27 Thread GandalfG8
Hi Paul I'm not sure if we're talking about the same thing, on the GPIB interface schematic I'm looking at there's four 74LSxxx ICs used for address decoding and buffering followed by an MC68488P interface adapter driving a pair of MC3447P bidirectional bus transceivers and that's it. Th

[time-nuts] Language -- The eternal barrier

2013-07-01 Thread GandalfG8
Having recently bought a couple of MV89As I found listed on AmazonUK I received a feedback request a couple of days ago from the seller and took the opportunity to point out that whilst one was fine the other was much noisier than the first, and also in comparison with others I'd previo

Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB ...

2013-07-06 Thread GandalfG8
As per my reply to the same question on the HP group, you've identified the problem so just go for a reasonably close-ish equivalent and replace it! Regards Nigel GM8PZR In a message dated 06/07/2013 12:18:44 GMT Daylight Time, ma...@non-stop.com.au writes: C3 (17000uf @ 10v) is open

Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB ...

2013-07-06 Thread GandalfG8
Running load might not be quite as bad as you'd expect, switching them all on at exactly the same time would probably cause a nice fat pulse but perhaps that's a bit extreme:-), allowing an adequate margin though is always a good idea. If you could tap into the supply and get an idea of ru

Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB ...

2013-07-06 Thread GandalfG8
You wouldn't even need a UPS, check Google for mains voltage conditioners. APC's kit, for example, should be available worldwide and they make a range that, here in the UK anyway, starts for under 50 GBP. Regards Nigel GM8PZR In a message dated 06/07/2013 13:26:06 GMT Daylight Time,

Re: [time-nuts] Rockwell/Conexant Jupiter(?) 10kHz Output Off Frequency

2013-07-28 Thread GandalfG8
Hi David Aside from in the Jupiter itself the Zodiac chipset was widely used in GPS navigational receivers and, just for example there's one that's possibly similar to yours, albeit marked ZOD1, shown here http://www.gpsnuts.com/mygps/gps/hardware%20reviews/randmcnally/rand_mcnally _gps

[time-nuts] Trimble Nortel GPSTM Boards

2013-07-31 Thread GandalfG8
Having stuck a late bid on a recent auction for what I'd assumed was a Trimble Nortel NTGS50AA I then realised I'd just bought the single board version, part number 4500-00-CH with the Trimble 49422-CR OCXO. That in itself wasn't a problem, except perhaps the doubts cast over my sanity:-),

Re: [time-nuts] Trimble Nortel GPSTM Boards

2013-08-01 Thread GandalfG8
Hi Bob It's certainly very much from the same family, these seem to be a couple of years more recent but obviously aimed at the same spec, and I don't doubt they're going to behave in basically the same way, but given that such things are firmware driven that doesn't exclude possible quirks

Re: [time-nuts] Trimble Nortel GPSTM Boards

2013-08-01 Thread GandalfG8
Hi Charles Thanks for your comments, the surveyed position on this is looking pretty good but what I have now realised is that the severity of the jumps seems very much related to the number of sattelites being tracked. Switching from 8 to 7, or 7 to 8, sats seems to produce the biggest st

Re: [time-nuts] Trimble Nortel GPSTM Boards

2013-08-05 Thread GandalfG8
Many thanks to those who commented on this and apologies for the delayed response, having spent a few days in an internet free zone I've also had to contend with a couple of power failures since returning but am just about getting back to normal again, whatever normal might be:-) As suggest

Re: [time-nuts] Trimble Nortel GPSTM Boards

2013-08-06 Thread GandalfG8
Hi Jim, Yes I did, no value was perfect in this respect, ie as affecting the DAC steps, so settled on 20 as a bit of a compromise. The number of sats being tracked still seems to be a factor in the equation, setting an elevation angle of 20 degrees had quite a smoothing effect last night, t

Re: [time-nuts] Trimble Nortel GPSTM Boards

2013-08-06 Thread GandalfG8
Hi Bjorn, Many thanks for the tip, I'd seen discussions on the two part boards, NTGS50AA, but hadn't realised the extent to which this version had also been mentioned. Given that it was discussed as recently as early July, including comments on the wheel I've just reinvented, and that I did

Re: [time-nuts] Trimble Nortel GPSTM Boards

2013-08-06 Thread GandalfG8
Thanks Mark I'll start over and will do as you suggest. I'm sure you'll have been told this many times before but Lady Heather is an amazing piece of software, thank you, even if I do feel at times that I'm suffering from severe information overload:-) I guess this might be more a questio

Re: [time-nuts] motorola GPS antenna connector

2013-08-06 Thread GandalfG8
My records show the B1121P1114 as a 6 channel Oncore VP, which means it should be the same receiver as used in the Z3801A although I haven't looked to check that. The standard connector on these was what's known as an "OSX" Regards Nigel GM8PZR In a message dated 06/08/2013 10:25:27 G

Re: [time-nuts] motorola GPS antenna connector

2013-08-06 Thread GandalfG8
Ah, yes, sorry I forgot that, it's the same thing. Regards Nigel GM8PZR In a message dated 06/08/2013 11:20:26 GMT Daylight Time, ma...@non-stop.com.au writes: Can't seem to find anything in Aussie that is Called OSX connector. Could they be called MCX connector? We got some of those

Re: [time-nuts] Rb video

2013-08-07 Thread GandalfG8
Look again, the fully loaded -3dB bandwidth is specified as 300MHz:-) Regards Nigel GM8PZR In a message dated 08/08/2013 03:06:57 GMT Daylight Time, ma...@non-stop.com.au writes: Seems they are rated to 5MHz according to the manufacturer.. They ebay item number is 161081736069. --marki

Re: [time-nuts] 9390-55108 IRIG

2013-08-09 Thread GandalfG8
Didier has the 9390-6000 manual that has details of the IRIG ouputs for that, I wouldn't expect there to be too much difference, if any _http://www.ko4bb.com/manuals/index.php?dir=05%29_GPS_Timing/Datum_ (http://www.ko4bb.com/manuals/index.php?dir=05)_GPS_Timing/Datum) Regards Nigel G

Re: [time-nuts] strange hp 5345A option C19

2013-08-21 Thread GandalfG8
Hi Luca There are other items of HP equipment fitted with Ref Out and Ref In terminals joined by an external link, with the intention that the link is removed to connect an external standard to the Ref In terminal, but in a "normal" 5345A the external reference is used to phase lock the i

Re: [time-nuts] strange hp 5345A option C19

2013-08-22 Thread GandalfG8
Hi Luca The earlier 5345As were fitted with the 10544A oscillator, I've seen units with both that and the later 10811, so it could indeed be the original oscillator. If your 10544A has the PCB edge connector and is installed in the usual place then without seeing what's actually been done

Re: [time-nuts] strange hp 5345A option C19

2013-08-24 Thread GandalfG8
Hi Luca I'm sorry to hear that, there's not much satisfaction in being right when it comes with such news attached:-( The mod I devised was just a simple single link, totally reversible, that allowed testing, and use if required, of the counters without the internal reference. It's been a

Re: [time-nuts] New NTBW50AA

2013-09-08 Thread GandalfG8
Hi Dave, Just taking a short break from a major data recovery exercise to add a couple of comments to the replies you've already received. The part number for the DC to DC convertor should be written on the side of it, although it might be awkward to see if facing the inside of the case. On

Re: [time-nuts] New NTBW50AA

2013-09-08 Thread GandalfG8
Whoops, you're quite right !! The figures I quoted were the maximum taken straight from the manual, as I happened to have it open anyway, and whilst I did think the startup current seemed rather high didn't stop to check my own notes as I was in a bit of a rush, that'll teach me:-) Checki

[time-nuts] NTBW50AA Power Consumption

2013-09-10 Thread GandalfG8
I've monitored the power input against voltage for a couple of the uncased versions of these units, both fitted with Datel TPB-5/5-12/1-Q48 power converters and both well "warmed up", and it does increase somewhat with increasing input voltage. On both units the input power to the DC to DC

Re: [time-nuts] New NTBW50AA

2013-09-10 Thread GandalfG8
Hi Mark I'm currently monitoring two of these units with LH running on two separate PCs and temperature for each is being reported to six decimal places, does this mean LH is in some way interpolating the higher resolution readings? Regards Nigel GM8PZR In a message dated 10/09/2013 1

Re: [time-nuts] New NTBW50AA

2013-09-10 Thread GandalfG8
Re the time constant, the only way of changing it I'm aware of is with the & command, have you tried "e" to save the current configuration? Regards Nigel GM8PZR In a message dated 10/09/2013 16:19:00 GMT Daylight Time, quart...@hughes.net writes: Mine's reporting 6 places too. I get

Re: [time-nuts] ThunderBolt Display - Update

2013-09-12 Thread GandalfG8
Oh dear, was it something you said? In a message dated 12/09/2013 21:01:42 GMT Daylight Time, robert8...@yahoo.co.uk writes: Hi Adam, I have copied this to our outmoded reflector. At least it's low noise and high quality. Sorry but dispite having been a licenced amateur for 35 years,

[time-nuts] Pendulum CNT91 with TimeLab

2013-10-09 Thread GandalfG8
Has anybody had any success setting up the Pendulum CNT91, or the Tektronix rebadged equivalent FCA3100, to run with TimeLab? It was suggested here some time ago that it should be possible to achieve this by running the counter in talk only mode but so far I've had no luck with the FCA3100

Re: [time-nuts] Pendulum CNT91 with TimeLab

2013-10-09 Thread GandalfG8
Hi John Thanks for your reply. If I configure the counter for compatible mode, then set it up to measure frequency as a 53131/53132 from the "Acquire" menu and press the "Monitor" button, TimeLab displays the actual instrument name and then follows this with line after line of frequency

Re: [time-nuts] Pendulum CNT91 with TimeLab

2013-10-09 Thread GandalfG8
Hi Magnus, It certainly supposed to be there, I've just not been very good at finding it so far:-) Regards Nigel GM8PZR In a message dated 10/10/2013 00:33:15 GMT Daylight Time, mag...@rubidium.dyndns.org writes: Hi John, On 10/09/2013 11:48 PM, John Miles wrote: > TimeLab will ca

Re: [time-nuts] Pendulum CNT91 with TimeLab

2013-10-09 Thread GandalfG8
Considering that I now know there is data coming through I'm wondering if I'm still misinterpreting that error message. I was assuming that the ID string was what TimeLab was claiming to be an invalid frequency but it occurs to me that it might also mean "I'm getting invalid frequency data an

Re: [time-nuts] Pendulum CNT91 with TimeLab

2013-10-10 Thread GandalfG8
Hi John That's fixed it, great big happy grin here:-), thank you. I did find that unzipping the files into the "drivers" sub folder didn't have any effect, on my Win7 installation anyway, but then noticed the original .TLL files were in the TimeLab folder iteslf so tried overwriting those

Re: [time-nuts] Pendulum CNT91 with TimeLab

2013-10-10 Thread GandalfG8
Hi John Just as a quick follow up, I'm still intrigued as to why I've been seemingly unable to get the CNT91/FCA3100 to run in talk-only mode and might well come back to that when I have a bit more time but, from a TimeLab point of view, with the HP emulation up and running would there act

Re: [time-nuts] Pendulum CNT91 with TimeLab

2013-10-11 Thread GandalfG8
Hi John I can assure you that "helped" is very much an understatement:-), and again many thanks. Thanks too for your comments re talk-only vs native drivers, I understand better now and will keep those archived for future reference. There's certainly a lot less incentive now to further i

Re: [time-nuts] Pendulum CNT91 with TimeLab

2013-10-15 Thread GandalfG8
Hi Matthieu I don't know if anybody else can help, but although I do have an older copy of Labview it's been a while since I've used it and don't think I've even tried it with the FCA3100. I have tried activating talk-only mode using the NI-Max interface but didn't have any sucess with that

Re: [time-nuts] Need a schematic of Trimble 2003 era Thunderbolt RX

2013-10-23 Thread GandalfG8
Hi Bob As far as I'm aware there is no schematic available for the Thunderbolt, I'm pretty sure it would have been shouted here with glee is anyone had found one:-) If your specific requirement though is to monitor for failure of the 10MHz output then monitoring the DC conditions before a

Re: [time-nuts] The 5MHz Sweet Spot

2013-11-03 Thread GandalfG8
Hi Bob I've seen this topic discussed here before and it does seem to raise some quite strong emotions and there does seem to be some confusion. I can remember quite clearly, historically at least, 5MHz being commonly promoted as the optimum frequency for crystal oscillators on the basis t

[time-nuts] 3GHZ Extender for HP 53131A and 53132A

2013-11-08 Thread GandalfG8
I suppose this might be a bit off topic, but for those of us with these HP counters there's been very good deal running on 3GHz extender boards on Ebay for the past few weeks. These aren't HP originals but they are new plug 'n play alternatives, certainly a very good clone, and excellent va

Re: [time-nuts] 3GHZ Extender for HP 53131A and 53132A

2013-11-08 Thread GandalfG8
Hi Rick As far as I'm aware this is pretty much a copy of the HP original which used a Fujitsu, or similar, MB510-PF prescaler, so a sort of "what you see is what you get" situation:-) Regards Nigel GM8PZR In a message dated 09/11/2013 00:03:58 GMT Standard Time, rich...@karlquist

Re: [time-nuts] 3GHZ Extender for HP 53131A and 53132A

2013-11-08 Thread GandalfG8
In a message dated 09/11/2013 01:30:14 GMT Standard Time, hmur...@megapathdsl.net writes: rich...@karlquist.com said: > This high sensitivity is probably a bad thing, not a good thing. It is > indicative of a dynamic divider. For a frequency counter prescaler, you > want a static divider,

Re: [time-nuts] 3GHZ Extender for HP 53131A and 53132A

2013-11-09 Thread GandalfG8
Hi Rick Thanks for the clarification. I'd thought at first you were suggesting these replacements were somehow at fault in comparison with the original design, which was the bit I couldn't understand since they seemed to be virtually identical, rather than commenting on the original desig

Re: [time-nuts] national nc2001 atomic clock on eBay

2013-11-18 Thread GandalfG8
Extract and rebuild in Acrobat... on it's way back to you:-) Regards Nigel GM8PZR In a message dated 18/11/2013 09:44:38 GMT Standard Time, drkir...@gmail.com writes: Anyone know a quick way of reversing the order of the pages in a document?

Re: [time-nuts] 3GHZ Extender for HP 53131A and 53132A

2013-11-19 Thread GandalfG8
Hi Arnold, I was just about to reply to your first message and ask at what frequency you'd measured the sensitivity, but then found your follow up:-) I was very happy with the first one so bought a second one for my other HP counter and both seem to be very similar. I've just checked the 53

Re: [time-nuts] Trimble Studio, what is it?

2014-01-12 Thread GandalfG8
In a message dated 11/01/2014 19:35:05 GMT Standard Time, paul.alfi...@gmail.com writes: I take it you found the URL: http://trl.trimble.com/dscgi/ds.py/Get/File-674264/TrimbleStudio.exe -- it's not that obvious on the website. For me: "New Connection..." from the button bar com2 GPS Receiv

Re: [time-nuts] Trimble "Resolution SMTx" GPS Timing Receiver:

2014-01-14 Thread GandalfG8
Hi Zim Your project's looking good, but given that your next step is to design a board for it I'm intrigued as to why you didn't just go for the Trimble version on a carrier board? Have you seen the PPS-Piggy from Michael Tharp, another list member, it mates with the Resolution T and SMT

Re: [time-nuts] Lady Heather and the NTGS50AA

2014-01-18 Thread GandalfG8
Hi Ignacio I'm not familiar with the GPSTM tool, trying to run it here generates exception errors, but from what I see when it's trying to boot it's much the same format as Trimble's various other offerings. If you run Trimble GPS Monitor though, version 1.6 was the latest but 1.05 is fin

Re: [time-nuts] Lady Heather and the NTGS50AA

2014-01-19 Thread GandalfG8
Hi Ignacio Your mention of the lights control had me confused for a minute, probably not that difficult these days:-), because I do remember seeing that so was wondering if the GPSTM tool had worked for me at one time after all. However, a search through the various trimble programs reminde

Re: [time-nuts] Lady Heather and the NTGS50AA

2014-01-19 Thread GandalfG8
Whoopswill now write 1000 times..."I must pay more attention":-) I see you've already tried Tboltmon, so I presume there must be a bit more to GPSTM monitor than is obvious from my quick glimpses before it crashes. Let's see if it will run under Win98.. Regards Nigel GM8PZR

Re: [time-nuts] Lady Heather and the NTGS50AA

2014-01-19 Thread GandalfG8
Oh well, 0230 is probably as good a time as any to call it quits for the day:-) I've now tried Win98 and even loaded Win95 on to an old laptop as that and NT was what the GPSTM tool was originally intended to run under and it's still not happy, so it does look to be a non starter, in more w

Re: [time-nuts] Nortel GPSDO osc age alarm

2014-01-24 Thread GandalfG8
Hi Volker One possibility, as I found with one of these recently, is that your oscillator has aged such that the required EFC voltage for 10MHz output is now outside the range provided by the board. The EFC behaviour can be tracked if Lady Heather is enabled from switch on and the DAC vol

Re: [time-nuts] Nortel GPSDO osc age alarm

2014-01-24 Thread GandalfG8
Whilst on second thoughts it does seem a bit odd that this oscillator has passed 10MHz and still not locking this might be linked to the alarms being generated at around 5.6 volts as per my previous comment, even though the EFC voltage at the extreme does, theoretically at least, seem to be e

Re: [time-nuts] Nortel GPSDO osc age alarm

2014-01-24 Thread GandalfG8
In a message dated 24/01/2014 17:06:43 GMT Standard Time, ail...@t-online.de writes: Thanks so much, Nigel, for this very interesting mail. Yes, the voltages are exactly as my ones. And yes, I've removed the oscillator, already. I then removed the thermal isolation from the osc, as well as

Re: [time-nuts] Nortel GPSDO osc age alarm

2014-01-24 Thread GandalfG8
In a message dated 24/01/2014 21:48:27 GMT Standard Time, ail...@t-online.de writes: New ways of RF design - see photo ;-) - Definitely the last word in high rise developments:-) And glad to hear you got it sorted. Ok, I put three 1N4148 in series between D

Re: [time-nuts] EFC divider resistors

2014-01-31 Thread GandalfG8
The problem is certainly real enough. What you're seeing is a drift of approx 2500ppm, and Vishay shows the temperature coefficient of their standard carbon film resistor, for example, to be approx 200ppm per degree C for a value of 20K. If yours is carbon film this would imply your measur

Re: [time-nuts] EFC divider resistors

2014-01-31 Thread GandalfG8
It's hard to be sure without knowing the characteristics of the DAC ouput and the oscillator EFC, but if you're only making a one off I wonder if it might perhaps be possible to simplify that arrangement to just a potential divider using selected values and being fed from the DAC and tapped

Re: [time-nuts] EFC divider resistors

2014-01-31 Thread GandalfG8
Is the op amp just a unity gain buffer or does it have any gain setting resistors that might be adjusted? I'm just wondering if you could tailor the gain to reduce the swing rather than require the oscillator to effectively require a larger swing. The 344310-T is likely to have come from a

Re: [time-nuts] New Acquisition: HP-53132A

2014-02-02 Thread GandalfG8
I'm not sure I'd want to go quite this far, but here's one option.. http://gerrysweeney.com/hp-53131a-hard-power-switch-modification/ Regards Nigel GM8PZR In a message dated 02/02/2014 03:50:56 GMT Standard Time, stanw...@verizon.net writes: Hello The Net, I just got in the

Re: [time-nuts] BC637PCI and OCXO

2014-02-07 Thread GandalfG8
I played with this around five or six years ago but unfortunately my notes from that time are likely to be buried somewhere still waiting to be scanned or indexed. All the necessary information though is in the user and SDK manuals, connections for the 10MHz external input and EFC output

Re: [time-nuts] BC637PCI and OCXO

2014-02-07 Thread GandalfG8
Whilst sorting through my BC637PCI files earlier I realised for the first time that an ISO file I'd downloaded in 2010, described by Symmetricom as "BC635/637 driver", is actually a full software and documentation CD, presumably what was then being supplied with new hardware. Ether that or I

Re: [time-nuts] BC637PCI and OCXO

2014-02-07 Thread GandalfG8
The information you need is more in the description of the software commands, this will tell you how to switch between the internal and external oscillators and how to vary the conditioning parameters and I'm pretty sure, although it's been a while so might be wrong, that some of the softwa

Re: [time-nuts] BC637PCI and OCXO

2014-02-07 Thread GandalfG8
My first card at least is a Datum card so quite old now, and that was fine doing what you want to do.. You really will need to read the manuals in some detail and I do suggest downloading the larger of the two files I uploaded, that will give you the latest versions of the Demo programs tha

Re: [time-nuts] BC637PCI and OCXO

2014-02-07 Thread GandalfG8
Sounds like you cracked it, and beat me to it:-) I just dug out a PCI expansion chassis, the quickest option for now, and have one card up and running but have discovered, as a left over from my playing earlier, that installing the later software, what Symmetricom calls its "BC635/637 confi

Re: [time-nuts] BC637PCI and OCXO

2014-02-08 Thread GandalfG8
Following my earlier post with download links for the Symmetricom software and documentation CD TVB was kind enough to send me this Symmetricom link.. http://www.symmetricom.com/bus-level-timing-sdk-and-driver-downloads/ I've verified that the two Windows archives there for the BC635/63

[time-nuts] BC637PCI 1024 week rollover

2014-02-09 Thread GandalfG8
Oh well, full credit to Mr Trimble for getting it right, he does bake exceedingly nice GPS modules and the Ace3 doesn't have a rollover issue and it does report the date correctly. Unfortunately, as far as I can tell anyway, the BC637PCI takes the raw GPS time data from the Ace3 and perform

Re: [time-nuts] BC637PCI 1024 week rollover

2014-02-09 Thread GandalfG8
In a message dated 09/02/2014 15:31:47 GMT Standard Time, mag...@rubidium.dyndns.org writes: On 09/02/14 12:56, gandal...@aol.com wrote: > Oh well, full credit to Mr Trimble for getting it right, he does bake > exceedingly nice GPS modules and the Ace3 doesn't have a rollover issue and it >

Re: [time-nuts] BC637PCI 1024 week rollover

2014-02-09 Thread GandalfG8
It may be that your onboard batteries are in better health than mine are, although mine might have been disabled using the software, as I tried booting up without an antenna this evening and got the right year this time but twith he date as 1st January:-) What I found when running in GPS m

Re: [time-nuts] BC637PCI 1024 week rollover

2014-02-10 Thread GandalfG8
That's the document I was refering to when I said earlier that I'd seen written confirmation from Trimble that they weren't expecting any rollover problems with the Ace3, I didn't mention the "through the year 2015" comment as we haven't actually got there yet:-) That may indeed be an issue

Re: [time-nuts] BC637PCI 1024 week rollover

2014-02-10 Thread GandalfG8
Ah, I took 1999 as I thought that was the only relevant date for another 1024 weeks, I'm not familiar with the shifted 1024 week period so will take a look at that. Does "shifted" imply a shift at the whim of the manufacturer, ie could it explain why these boards might have been ok a few ye

Re: [time-nuts] BC637PCI 1024 week rollover

2014-02-10 Thread GandalfG8
In a message dated 10/02/2014 21:56:25 GMT Standard Time, mag...@rubidium.dyndns.org writes: On 10/02/14 11:15, gandal...@aol.com wrote: > Ah, I took 1999 as I thought that was the only relevant date for another > 1024 weeks, I'm not familiar with the shifted 1024 week period so will take a

Re: [time-nuts] BC637PCI 1024 week rollover

2014-02-11 Thread GandalfG8
Ah, sorry, when you commented before about modifying the demo software it obviously didn't register with me quite what you were trying to do. In the BC637PCI Demo software, I'm using version 7.0.0, under the "Help" menu, one item is Receiver Firmware Version and this returns the Packet 45 dat

Re: [time-nuts] BC637PCI 1024 week rollover

2014-02-11 Thread GandalfG8
Ah, now I understand:-) All I'm using at the moment though is a small Trimble patch mounted indoors and although it does drop out occasionally most of the time it's ok, have you checked your satellite signal levels as reported by the BC637 software? Although my own interest is really only i

Re: [time-nuts] BC637PCI 1024 week rollover

2014-02-13 Thread GandalfG8
You've lost me, what code are you modifying at the moment, is it the actual Datum demo software? Regards Nigel GM8PZR In a message dated 12/02/2014 03:48:12 GMT Standard Time, t...@patoka.org writes: You are right ! Now I am going to modify the code a lit bit. Each time as we call

[time-nuts] BC637PCI Flash Memory Dump

2014-02-15 Thread GandalfG8
I've downloaded the flash memory contents from a BC637PCI card, it's a 128K file but also had to save it as 64K to please the disassemblers I found online. That didn't look to be an issue, as far as I can tell only 64K is used anyway. The memory chip is a CAT28F010, as opposed to a 29F010 s

Re: [time-nuts] Different breed of time nuttery

2014-02-24 Thread GandalfG8
A triumph of matter over mind. In a message dated 24/02/2014 04:35:21 GMT Standard Time, dmend...@gmail.com writes: This is a different breed of time nuttery than usual in this list but i think that at least some of you will enjoy it: http://www.behance.net/gallery/FLUX-1440/2420150 F

Re: [time-nuts] Another "atomic" clock question

2014-03-02 Thread GandalfG8
In a message dated 02/03/2014 02:07:05 GMT Standard Time, bob91...@yahoo.com writes: All this is very interesting. However, my interest is frequency. In other words, I want to know that my standard oscillators are as close to desired frequency as possible, and how close that turns out to

Re: [time-nuts] Another "atomic" clock question

2014-03-02 Thread GandalfG8
In a message dated 02/03/2014 16:06:49 GMT Standard Time, bob91...@yahoo.com writes: Yes Nigel, it's a waste of time but so are computer games and going to Disneyland and such. We do it because we get pleasure, and nobody can criticize that. - Hi Bob, I'm not sure

Re: [time-nuts] Why using HP5370 ext-ref is (maybe) a bad idea

2014-03-03 Thread GandalfG8
What about replacing the 3336 external reference with something like an HP 10811 and checking what difference, if any, that makes? Regards Nigel GM8PZR In a message dated 03/03/2014 13:42:33 GMT Standard Time, p...@phk.freebsd.dk writes: In message , Bob Camp writes: >The likely an

Re: [time-nuts] Why using HP5370 ext-ref is (maybe) a bad idea

2014-03-03 Thread GandalfG8
Sorry, I must have missunderstood. I realise the internal reference is already a 10811, but I thought there was some concern that just the use of the external reference facility might be in some way responsible, so if that was the case then perhaps using an external 10811 might also be expe

Re: [time-nuts] GPSDO module connections

2014-03-03 Thread GandalfG8
It might also be worth noting that whilst manufacturers such as Trimble do recommend the use of RG59 or similar 75 ohm cable for GPS module antenna connections this is based on its lower loss compared with 50 ohm equivalents such as RG58. The connector itself on the GPS module, in most case

Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812...

2014-10-21 Thread GandalfG8--- via time-nuts
It seems from the auction revision table that this seller has been offering these for some time, so perhaps another "hidden" gem:-), but it's perhaps also worth noting that if this system functions on similar principles to earlier RFTG kit then the GPS conditioning is only applied to the unit

Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812...

2014-10-22 Thread GandalfG8--- via time-nuts
Hi Stewart Yup, I was certainly wrong re the conditioning, sorry about that and thanks for the correction. I was under the impression from way back that in the original RFTG setup it was only the OCXO that was GPS conditioned but see now the manual, that I've also had from way back, confi

Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812...

2014-10-22 Thread GandalfG8--- via time-nuts
32 GMT Daylight Time, golgarfrinc...@gmail.com writes: GandalfG8 at aol.com GandalfG8 at aol.com Wed Oct 22 04:35:40 EDT 2014 "Similarly, with this RFTG-u kit I'd be more inclined to look for ways of routing the native 5MHz from the GPS conditioned Milliren 260 series oscillator to the outsid

Re: [time-nuts] Z38xx rack mounts

2014-10-22 Thread GandalfG8--- via time-nuts
Hi Dave Many thanks for the MTI260 data, that's very useful and much appreciated. As regards the the Z38xx modules, my Z3801As actually measure 10 9/16 between the front panel edges but obviously still too much to fit two like that into a standard 19 inch rack. I've considered two optio

Re: [time-nuts] Z38xx rack mounts

2014-10-22 Thread GandalfG8--- via time-nuts
Plan B and a half. or C and three quarters or whatever:-) I just measured a Z3801A case, can't speak for any others in the series, and that measures 9 1/4 inches from one outside edge of the front panel to the opposite side of the box itself. Cutting off opposing edges from two front

Re: [time-nuts] Z38xx rack mounts

2014-10-22 Thread GandalfG8--- via time-nuts
L On Wed, Oct 22, 2014 at 5:53 PM, GandalfG8--- via time-nuts <_time-nuts@febo.com_ (mailto:time-nuts@febo.com) > wrote: Plan B and a half. or C and three quarters or whatever:-) I just measured a Z3801A case, can't speak for any others in the series, and that measures 9 1

Re: [time-nuts] Z38xx rack mounts

2014-10-23 Thread GandalfG8--- via time-nuts
nger piece mount in the slots in the side of the front bezel and lock together. The lock pieces strap the rear square frame posts together. Add the 2U (each 'U' is 1-3/4") rack mount flanges and you're good to go. Mike On 10/22/2014 4:26 PM, GandalfG8--- via time-

Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812...

2014-10-23 Thread GandalfG8--- via time-nuts
n the road, someone will come up with the mods to convert a REF-1 into a REF-0, and vice versa, unless the firmware prevents that. Bob From: GandalfG8--- via time-nuts To: time-nuts@febo.com Sent: Tuesday, October 21, 2014 5:59 AM Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z

Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812...

2014-10-23 Thread GandalfG8--- via time-nuts
;m just as happy to have bought both units at this point. Maybe, down the road, someone will come up with the mods to convert a REF-1 into a REF-0, and vice versa, unless the firmware prevents that. > > Bob > From: GandalfG8--- via time-nuts > To: time-nuts@febo.com >

Re: [time-nuts] Some specs for MTI Millren 260 OXCOs

2014-10-23 Thread GandalfG8--- via time-nuts
More than one way to skin an egg, or something like that anyway:-) A Google search on Vaish Milliren turned up this paper and another on the 260. _www.mti-milliren.com/MTIPapers/Rubidium_Perf_in_260.pdf_ (http://www.mti-milliren.com/MTIPapers/Rubidium_Perf_in_260.pdf) _www.mti-millire

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