Hi I sort of doubt that a GPS aux supply is quite that low current. I have seen some RTC’s that won’t last a month on a coin cell. My recollection is that the Oncore backup is closer to that category than the “many years on a cap” group.
Bob > On Oct 31, 2014, at 9:26 PM, Brooke Clarke <[email protected]> wrote: > > Hi Bob: > > When HP came out with the 300 series Rocky Mountain Basic computers they were > fitted with a super cap to power the RTC. > I will keep time for some months. > http://www.prc68.com/I/HPIB.shtml#300 > > Mail_Attachment -- > Have Fun, > > Brooke Clarke > http://www.PRC68.com > http://www.end2partygovernment.com/2012Issues.html > http://www.prc68.com/I/DietNutrition.html > Bob Camp wrote: >> Hi >> >> The ultra cap is a pretty small one (physical small). You might be able to >> find a larger (more farads) one that would fit in the same space. It’s not >> going to help for a hours and hours sort of outage. It might get you from >> dying in 15 minutes to dying in a half hour. >> >> Bob >> >>> On Oct 31, 2014, at 12:42 PM, Tom Miller <[email protected]> wrote: >>> >>> I thought so too. There is an ultracap in each unit. >>> >>> >>> Tom >>> >>> ----- Original Message ----- From: "Mike Seguin" >>> <[email protected]> >>> To: "Discussion of precise time and frequency measurement" >>> <[email protected]> >>> Sent: Friday, October 31, 2014 12:19 PM >>> Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, >>> Z3811A, Z3812A GPSDO system >>> >>> >>>> I have both of my units sitting on the bench. I found that I needed to >>>> connect them together to get the REF1 unit to come out of standby. >>>> >>>> I am using GPSCon to monitor and it appears to work fine. >>>> >>>> One thing on my units, when I power cycled them, it started a 'survey' >>>> over! I didn't expect that. Are others seeing this. There must be a way to >>>> store the surveyed position.... >>>> >>>> Tnx, >>>> Mike >>>> >>>> On 10/30/2014 3:59 PM, Bob Stewart wrote: >>>>> Hi Anthony, >>>>> Did you power cycle both units as part of connecting them together at J5 >>>>> to J5? And can you remind me whether you are using the supplied >>>>> interface cable, or are you using something else? After warmup, the ON >>>>> light is on for the REF-0 unit and the STBY light is on for the REF-1 >>>>> unit. While running, there is no output from J8 on the unit marked STBY. >>>>> J8 works on the unit marked ON. There is a timestamp coming from J6, and >>>>> I think a 1PPS signal on some pin or other. >>>>> >>>>> Bob From: Anthony Roby <[email protected]> >>>>> To: Discussion of precise time and frequency measurement >>>>> <[email protected]> >>>>> Sent: Thursday, October 30, 2014 2:24 PM >>>>> Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, >>>>> Z3811A, Z3812A GPSDO system >>>>> >>>>> I'm still having no luck with mine. When I power on, the LEDs cycle, the >>>>> Fault light is on and the No GPS and Standby lights flash. When I >>>>> connect my GPS antenna, the No GPS light stops flashing and stays on. >>>>> After several minutes only the Standby light is on. >>>>> >>>>> When I connect both the Ref1 and Ref0 together with the interface cable, >>>>> the Fault lights on both units are illuminated. >>>>> >>>>> Do you see the same? I don't know what to infer from the Fault light >>>>> since there is no supplemental data to work from. >>>>> >>>>> Anthony >>>>> >>>>> >>>>> _______________________________________________ >>>>> time-nuts mailing list -- [email protected] >>>>> To unsubscribe, go to >>>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>>> and follow the instructions there. >>>>> >>>> -- >>>> >>>> 73, >>>> Mike, N1JEZ >>>> "A closed mouth gathers no feet" >>>> _______________________________________________ >>>> time-nuts mailing list -- [email protected] >>>> To unsubscribe, go to >>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>> and follow the instructions there. >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
