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 <tmiller11...@verizon.net> wrote:
I thought so too. There is an ultracap in each unit.
Tom
----- Original Message ----- From: "Mike Seguin" <n1...@burlingtontelecom.net>
To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com>
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 <ar...@antamy.com>
To: Discussion of precise time and frequency measurement <time-nuts@febo.com>
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 -- time-nuts@febo.com
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 -- 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.
_______________________________________________
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.
