Re: [time-nuts] Austron 2100R Manual? Or Info?
Hi John, I'll have a look. In process of moving house so most of my stuff is boxed and ready to go, but I do believe that there is a 2100R manual lurking around amongst the mess. Will get back to you shortly. Rob K - Original Message - From: John Ackermann N8UR [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Tuesday, July 25, 2006 11:46 PM Subject: [time-nuts] Austron 2100R Manual? Or Info? I picked up a 2100R Loran receiver at the Dayton Hamvention this year for a really good price, and now I'm trying to do something with it. I had thought it was simply a GPIB-controlled-only version of the 2100F, but a couple of references I found on the web make me think there may be other differences. Does anyone have a 2100R manual, or failing that, any more detailed info about it? Thanks, John ___ 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] Austron 2100R Manual? Or Info?
Hi John, Sorry, had a look in the boxes, and can't find anything. From memory (and going back 20 years here!), 2100R uses same guts as 2100F, but was a cut down version for remote system use. Where the 2100F had keypad and display, the 2100R had switches (behind front panel??) and remote I/O to set GRI. If you have or can get a 2100F manual, it may help you. Good luck Rob K - Original Message - From: John Ackermann N8UR [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Tuesday, July 25, 2006 11:46 PM Subject: [time-nuts] Austron 2100R Manual? Or Info? I picked up a 2100R Loran receiver at the Dayton Hamvention this year for a really good price, and now I'm trying to do something with it. I had thought it was simply a GPIB-controlled-only version of the 2100F, but a couple of references I found on the web make me think there may be other differences. Does anyone have a 2100R manual, or failing that, any more detailed info about it? Thanks, John ___ 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] Austron 2100R Manual? Or Info?
John, Just seen this on Google http://www.yourmanualsource.com/index.cfm/fuseaction/product.display/product_id/168336/index.cfm 2100R Manual for hire $25 Rob K - Original Message - From: John Ackermann N8UR [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Tuesday, July 25, 2006 11:46 PM Subject: [time-nuts] Austron 2100R Manual? Or Info? I picked up a 2100R Loran receiver at the Dayton Hamvention this year for a really good price, and now I'm trying to do something with it. I had thought it was simply a GPIB-controlled-only version of the 2100F, but a couple of references I found on the web make me think there may be other differences. Does anyone have a 2100R manual, or failing that, any more detailed info about it? Thanks, John ___ 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
[time-nuts] Update on HP-5345A (long!)
Good morning! Following this comment I made some days ago: Well, yesterday I was lucky enough to buy an HP-5370A in unworking condition (just lights POWER led) for the princely sum of 57.50 Euro (and NO shipping as it is a local buy :-) ). From same seller I got an unworking (but complete!) 5345A for 37 Euro. And also a paper 5370A service manual (14.59 Euro). And some other cheap HP things... I have some news. As you know, I got the 5370A working as it had just a shorted tantalum and an open fuse resistor. So yesterday I went for the 5345A. I have a working unit and also a box of parts I got from the shipment-damaged unit (the one pictured here http://jvgavila.com/hp5345a.htm) First than anything else, I opened the unit to find it was missing the fan, and fan wires (which have on them 115Vac when powered!) were hanging around, touching some cards!. I was lucky to open it BEFORE powering on, as I could have ruined the unit. Hint: ALWAYS take a look inside units BEFORE powering on! My 5345A stack of parts included the fan and all needed hardware to fix it on place so I did it. Unit seemed complete except for the HPIB card empty space (unit had not that option; if somebody has an spare, I would love to buy it). One curious thing is that the ovenized oscillator is not HP but another brand. I guess it is a cheaper unit. Date on it is 1986 whilst this 5345A seems to have been made around 1982 so it appears to be as a later add-on. Anyway, I have also an spare from the parts-unit so it could be replaced if needed. Once I had visually checked the unit and replaced the missing fan, I powered the unit. All I got was fan noise (these units do really generate a _bit_ of noise!) and all '0' digits (not really; one position had a faulty segment; I swapped the 7-segment unit with the first one, which only uses the center segment). Of course, counter function didn't work. Well, at least there was no smoke! I had not opened bottom cover and I did it... to find a nice metal part loose on the bottom cover. Hint #2: open ALSO bottom cover to check for weird things! And then, checking from the bottom side, I found a suspicious thing: one connector to the input assembly was semi-unplugged!. Somebody else had obviously been there before and had tried to fix the unit (without success, I must add). So I connected it and after some vacuum-cleaner work (there were some spider rests around), I powered the unit again. This time I got a promising display, showing the ARMED sign, '*' and all '0's. Good!. So I put a 10MHz signal on INPUT A... and got a 99.xx mHz indication. So, obviously, there were some other faults on the unit. I took the Service Manual (also in paper form, which is VERY convenient to work on large foldouts) and started the troubleshooting procedure. It is curious but all my previous works on HP gear didn't need of any 'special' thing. But in the 5370A there was even an special card (I was quoted US$250 and US$1490 from two sellers for the repair kit). And in the 5345A there is lots of logic analyzer work... but, as I had a complete parted-out unit, I was confident I could fix it the fast way (i.e. replacing modules) and then perhaps working on the faulty assembly. As I wanted to check if the spare cards I had were good, I began replacing them from left to right and checking each time if there was any change in the counter operation. I put it on the CHECK position, waiting for the 100 MHz display... First six cards I had, except one, worked same way as original ones. The other one just didn't work, so I replaced it with original unit, hoping it was not the faulty card. And then, replacing next one (A9 MAIN GATE ASSEMBLY), I got the counter working :-)!!!. I checked it also with an external signal and it went right up to 500MHz with good sensitivity. NICE!!! I swapped all the cards for the original units, except A9, and counter continued to work. So I have a good set of spares (except one), just in case. Once unit was working, I looked at the poor front panel. It seems unit had been stored and transported without care and it was badly scratched. Fortunately, my parts unit front panel was very nice looking. But as it was an older version, it was not directly compatible, as power connector was completely different. Also, it had sustained some frame damage. So I took out all the knobs and nuts in both and got the aluminum plate swapped among units. Once the knobs were carefully cleaned, 'new' front panel looked really good. So this is the end of this long post (hope somebody arrives to this point ;-)!) All in all, from the three large HP units I got last Friday (5370A, 5345A, 8660B), I have already fixed two :-). The other one (8660B) has some missing parts and will sure take a lot more time (BTW, does somebody on the List have an 8660B parts-unit?) Hard work begins now... I need to fit the units in my crowded workbench :-)! Best regards, JOSE
Re: [time-nuts] Z3801 saga
From: Richard H McCorkle [EMAIL PROTECTED] Subject: Re: [time-nuts] Z3801 saga Date: Tue, 25 Jul 2006 19:46:33 -0800 Message-ID: [EMAIL PROTECTED] For a schematic of the Z3801A outer oven controller try here: http://homepage.sunrise.ch/mysunrise/shegnauer/Z3801A/Outer%20Oven%20Controller/z3801a_outer_oven_description.htm Hope this helps. Thanks! Beside it there is also the PSU schematic (for those that don't know): http://homepage.sunrise.ch/mysunrise/shegnauer/ Cheers, Magnus ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
[time-nuts] Interference effects to GPS timing
Hi, Thankyou for your responce. My main prob is not to avoid interference but to see how does a GPS timing rcvr behaves in the interferece environment. I have tried to search for articles/papers on interference effects on GPS timing rcvrs, but was unable to find any good stuff. Although GPS timing is in use for last 16 - 17 years, but it seems that ppl take this thing for-granted. could you locate me any such information? Regards Faisal A. Khan - Yahoo! Messenger with Voice. Make PC-to-Phone Calls to the US (and 30+ countries) for 2¢/min or less. ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Interference effects to GPS timing
On Wed, July 26, 2006 10:42, Phaysal Khan said: I have tried to search for articles/papers on interference effects on GPS timing rcvrs, but was unable to find any good stuff. I know of one report made a year ago, or so. Do not know if its available. Will check, and let you know. It might take a few weeks though, since its vacation time here. Although GPS timing is in use for last 16 - 17 years, but it seems that ppl take this thing for-granted. could you locate me any such information? Or, maybe interference/jamming studies are mostly funded by organisations that might classify the results... btw, did you read pages around 3.11 in chapter 3 of the oncore documentation that was posted a link to here a few days ago? br, Björn ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] GPS Timing in Interference Environment
I want to see Effects of Interference(CW) on GPS timing receivers. At this stage I am mainly interested on what will happen to the timing receiver itself when effected by CW interference and the next stage will be to find out how this effect could be mitigated. Faisal, See also the 7 messages in this thread; someone working on the same problem as you: http://www.febo.com/pipermail/time-nuts/2006-May/020693.html http://www.febo.com/pipermail/time-nuts/2006-May/thread.html /tvb ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Interference effects to GPS timing
Faisal, I found the following Googling:- They may provide further useful information or leads to specific sources of data. http://www.its.bldrdoc.gov/pub/ntia-rpt/01-384/chap1.pdf http://www.mwrf.com/Articles/Index.cfm?Ad=1ArticleID=5538 http://www.gmat.unsw.edu.au/snap/publications/asghar_etal2005a.pdf http://www.chips.navy.mil/archives/02_spring/index2_files/GPS.htm http://w3.antd.nist.gov/wctg/manet/docs/uwbgpsprop.pdf Rob Kimberley - Original Message - From: Phaysal Khan [EMAIL PROTECTED] To: time-nuts@febo.com Sent: Wednesday, July 26, 2006 9:42 AM Subject: [time-nuts] Interference effects to GPS timing Thankyou for your responce. My main prob is not to avoid interference but to see how does a GPS timing rcvr behaves in the interferece environment. I have tried to search for articles/papers on interference effects on GPS timing rcvrs, but was unable to find any good stuff. Although GPS timing is in use for last 16 - 17 years, but it seems that ppl take this thing for-granted. could you locate me any such information? Regards Faisal A. Khan - Yahoo! Messenger with Voice. Make PC-to-Phone Calls to the US (and 30+ countries) for 2¢/min or less. ___ 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] Interference effects to GPS timing
Hi Faisal: There have been two articles in GPS World within the last year about this. One case was about Santa Cruz harbor in California being jammed by a malfunctioning active antenna on a boat. The Naval Postgraduate School in Monterey was involved in tracking down the problem. Another case has to do with the radar on military ships burning out GPS receivers on nearby ships, including other military ships. Have Fun, Brooke Clarke -- w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Phaysal Khan wrote: Hi, Thankyou for your responce. My main prob is not to avoid interference but to see how does a GPS timing rcvr behaves in the interferece environment. I have tried to search for articles/papers on interference effects on GPS timing rcvrs, but was unable to find any good stuff. Although GPS timing is in use for last 16 - 17 years, but it seems that ppl take this thing for-granted. could you locate me any such information? Regards Faisal A. Khan - Yahoo! Messenger with Voice. Make PC-to-Phone Calls to the US (and 30+ countries) for 2¢/min or less. ___ 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] Austron 2100R Manual? Or Info?
Thanks for the pointer, Rob. I'll order this from the guy when I get back from vacation after next week. The guy who had it before me installed his own OCXO inside, and I haven't opened the box yet to figure out how he routed that signal. As it is now, the GRI is set correctly but I'm getting a blinking red alarm LED. I suspect I may need to loop the OCXO into the rear panel input. Thanks! John Rob Kimberley wrote: John, Just seen this on Google http://www.yourmanualsource.com/index.cfm/fuseaction/product.display/product_id/168336/index.cfm 2100R Manual for hire $25 Rob K - Original Message - From: John Ackermann N8UR [EMAIL PROTECTED] To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Tuesday, July 25, 2006 11:46 PM Subject: [time-nuts] Austron 2100R Manual? Or Info? I picked up a 2100R Loran receiver at the Dayton Hamvention this year for a really good price, and now I'm trying to do something with it. I had thought it was simply a GPIB-controlled-only version of the 2100F, but a couple of references I found on the web make me think there may be other differences. Does anyone have a 2100R manual, or failing that, any more detailed info about it? Thanks, John ___ 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 ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Interference effects to GPS timing
Hi BJörn: Yes, the articles are about GPS in general, but I'm sure that if there's a problem that keeps a general purpose GPS receiver from working a GPS timing receiver will also suffer. Have Fun, Brooke [EMAIL PROTECTED] wrote: On Wed, July 26, 2006 18:23, Brooke Clarke said: Hi Faisal: There have been two articles in GPS World within the last year about this. One case was about Santa Cruz harbor in California being jammed by a malfunctioning active antenna on a boat. The Naval Postgraduate School in Monterey was involved in tracking down the problem. Another case has to do with the radar on military ships burning out GPS receivers on nearby ships, including other military ships. Do not remember any of those to be about the timing receiver aspects of interference/jamming. Interesting about the military ship radar buring out unconnected brand new antennas beeing shipped in with helicopters... The antennas would have needed the tin foil hats! -- BJörn ___ 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
Re: [time-nuts] time-nuts Digest, Vol 24, Issue 47
Hi Jose. I have an 8660C unit. There is a lot in it that is similar to the B version. It might be cheaper on the shipping if you can find one of the guys in Europe that has one. If not, let me know. Chuck Norton Frequency Standards Services 2727 E. Palmer Park Blvd. Ste 100 Colorado Springs, CO. 80909-5068 ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] time-nuts Digest, Vol 24, Issue 47
Hi, Thats a good stuff grp. I will going thru these and get back to u soon. by the way... i will be doing some experiments with some GPS rcvrs today as well. Regards Faisal - Talk is cheap. Use Yahoo! Messenger to make PC-to-Phone calls. Great rates starting at 1¢/min. ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] HP 5370A manual
Joseph Gray wrote: Yes, that may have been me. I was looking for an A manual some months ago and could only find the B manual. Thanks for having that A manual. You are welcome. I scanned the B manual myself, but I can't recall where I got the A one from. The manual on the B is the latest release - I have no idea about that on the A. A few days ago, I let Dave Cunningham at Agilent know that you had it and today he sent me an email saying that he was putting a copy on the Agilent site. Perhaps if you notice it appear on the Agilent site you can drop me a email. Then I'll remove it from my site, as I need to free up some disk space. But until it actually appears, I'll keep it here. -- Dr. David Kirkby ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] time-nuts Digest, Vol 24, Issue 47
Hello Faisal, a small annecdote about GPS jamming from the design of our FireFox GPS Disciplined synthesizers: We have a broadband synthesizer driven by a GPSDO on the same PCB. This synthesizer would completely swamp out the GPS receiption if you set it to 1574MHz CW output, the on-board noise was so powerfull (the output of the unit can be set from DC to 1640MHz). Our output can go up to +18dBm, millions of times more power than the GPS signal itself... The effect was that the M12+ receiver would just loose lock within a +-5 - 10MHz bandwidth around the GPS carrier. The receiver would show 0 sattelites being received. As soon as you set the frequency outside of this band, everything was fine. We improved this by putting the GPS board into a metal shield. So the effect of noise generated inside the enclosure was greatly mitigated. But the CW power radiated by the BNC connector itself on the unit is still enough to find its way to the antenna 10 meters away and about 3m above it, and swamp the signal! Putting a small paperclip into the BNC RF output connector at +18dBm at 1574MHz would probably cause a couple of blocks in our neighbourhood to loose GPS lock :) Never tried this and never will of course. bye, Said ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
