Re: [time-nuts] VIGO time interval devices
What about the Racal Instruments (Racal Dana) 2351 8pS, 300MHz? Yes, it is VXI but 8pS one-shot seems interesting... On Mon, Oct 31, 2011 at 10:24 PM, Arthur Dent golgarfrinc...@yahoo.comwrote: Has anyone looked into the Picotest (also sold as Array) U6200A TIC? Looks like DC-6Ghz with 12 digits/sec and 40ps resolution. Check the specs at: http://www.picotest.com.tw/product02.html One seller on the popular auction site has them for $1270 (with shipping). http://www.ebay.com/itm/New-Universal-Frequency-Counter-meter-ARRAY-U6200A-/270788500453 -Arthur ___ 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] Z3801 EFC error
Joe, Good guess. It's a 10811 with an additional oven wrapped around it for better thermal control. I'll check it in a couple days when I get home. Is this thermal fuse on the outside? Anyone have a schematic of this unit? Bob - Original Message - From: J. L. Trantham jlt...@att.net To: 'Discussion of precise time and frequency measurement' time-nuts@febo.com Sent: Tuesday, November 01, 2011 12:21 AM Subject: Re: [time-nuts] Z3801 EFC error I think it uses a 10811 OCXO. See if it is warm. If not, perhaps the 'thermal fuse'? Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Sent: Monday, October 31, 2011 11:17 PM To: time-nuts@febo.com Subject: [time-nuts] Z3801 EFC error Hi, My Z3801 just crapped out. It seems that the DAC has ramped up to the rails, 1048560, and I'm getting an EFC fault. Any tips before I open the unit and start poking around? The oscillator is running and pretty close to 10MHz, I don't have any reference accurate enough to check it. Any trends here, is it the EFC in the oscillator or is it the DAC and following amplifiers? Thanks, Bob ___ 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] VIGO time interval devices
The specs for the Racal 2351 indicate it might take 16.6 minutes to attain 8ps resolution, if I understand the specs correctly. Check under resolution mode vs max. sample rate, meas. time under input characteristics on the spec sheet. http://www.testequipmentconnection.com/tecspecs/Racal_Instruments_2351.PDF -Arthur ___ 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] Z3801 EFC error
Bob, The thermal fuse is inside the OCXO which is inside the outer oven. There was a recent (past week or so) thread on this list about a thermal fuse failure including pictures of the inside where the fuse is located. This, however, was for the 'non' wrapped version of the 10811. The problem will be getting past the outer oven. I've never tried that though I have replaced the thermal fuse on the 'non' wrapped 10811. That was really straight forward. I don't recall seeing a manual specifically for the 'wrapped' version of the 10811 but the manual for the 'non' wrapped version is available on the internet. I think one is on Didier's site. The trouble shooting guide is very helpful in finding out if the thermal fuse is the problem. Just measure the heater circuit current for the inner oven. If zero, the thermal fuse is the place to start. The outer oven, though, I think is separate. If your Z3801A is used indoors, I suspect the outer oven is probably not needed. Good luck. Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Robert Benward Sent: Tuesday, November 01, 2011 8:00 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Z3801 EFC error Joe, Good guess. It's a 10811 with an additional oven wrapped around it for better thermal control. I'll check it in a couple days when I get home. Is this thermal fuse on the outside? Anyone have a schematic of this unit? Bob - Original Message - From: J. L. Trantham jlt...@att.net To: 'Discussion of precise time and frequency measurement' time-nuts@febo.com Sent: Tuesday, November 01, 2011 12:21 AM Subject: Re: [time-nuts] Z3801 EFC error I think it uses a 10811 OCXO. See if it is warm. If not, perhaps the 'thermal fuse'? Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Sent: Monday, October 31, 2011 11:17 PM To: time-nuts@febo.com Subject: [time-nuts] Z3801 EFC error Hi, My Z3801 just crapped out. It seems that the DAC has ramped up to the rails, 1048560, and I'm getting an EFC fault. Any tips before I open the unit and start poking around? The oscillator is running and pretty close to 10MHz, I don't have any reference accurate enough to check it. Any trends here, is it the EFC in the oscillator or is it the DAC and following amplifiers? Thanks, Bob ___ 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] C-Max Receiver Experiment
There's a nice set of WWVB 'scope traces here: http://leapsecond.com/pages/sony-wwvb/ /tvb ___ 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] VIGO time interval devices
There seems to be a deluge of these OEM counters, mimicking the 53132 operation, with a bit better specs and built-in 3rd channel. Berkeley Nucleonics has them, Keithley has them, they all must come from the same Chinese OEM. Maybe the quality is good, maybe the specs are honest and apples to apples. Or maybe not. The only experience I had was with another Agilent knock-off, the BNC-branded arb generator model 645, which was cheaper than the Agilent, with a higher frequency capability (50MHz compared to 20MHz) and SCPI compatible. Didn't check side by side on a spectrum analyzer, but for the application I had it worked fine. As a plus, it had also digital output on the back (16 bits) so it doubled as a cheap word generator. It would be nice for a real time nutter to get one (BNC often offered 1 month loaners) and measure the actual performance. One thing we will only know 10 years from now is if they last as long as the HPs - or if the manufacturer will still exist. BNC has a comparison to Agilent and Pendulum on their site. Caveat Emptor. http://www.berkeleynucleonics.com/Comp/1105/1105_comp_chart.htm Jose -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Arthur Dent Sent: Monday, October 31, 2011 2:25 PM To: time-nuts@febo.com Subject: [time-nuts] VIGO time interval devices Has anyone looked into the Picotest (also sold as Array) U6200A TIC? Looks like DC-6Ghz with 12 digits/sec and 40ps resolution. Check the specs at: http://www.picotest.com.tw/product02.html One seller on the popular auction site has them for $1270 (with shipping). http://www.ebay.com/itm/New-Universal-Frequency-Counter-meter-ARRAY-U6200A-/ 270788500453 -Arthur ___ 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.
