From XTOncore Engineering Note "Keep Alive" BATT Power . 4.75 - 16 Vdc; 0.3 mA (max) or . 3V onboard battery; 15 uA typ., 60 uA max.
From UT Plus Backup Power Externally applied backup power Voltage 2.5V to 5.25V Current 5 μA typical @ 2.5 V 100 μA typical @ 5.0 V Optional Lithium Battery Onboard rechargeable cell is charged when main power is on Voltage 3 V Capacity 15 mAh approximately 3 months between charges Recharge approximately 8 hours for a full charge From GT . External 2.5 Vdc to 5.25 Vdc; 5 mA (typ.) @ 2.5 Vdc On 4/6/2011 2:51 PM, paul swed wrote:
Really have to open the 3801 up and go find the magical header. 2011/4/6 Greg Broburg <[email protected] <mailto:[email protected]>> I would vote for a lithium AA. Something like a Tadiran TL5104 3V6 @ 2A10 hrs Greg On 4/6/2011 2:43 PM, Chris Albertson wrote: I remember reading in one of the docs I have for the Oncore that Motorolla recommended a battery over a cap mainly for practical reasons. But now all I can find is some basic specs for what you need to conect to pin-1 on the header BATTERY (Externally applied backup power) Voltage: 2.5 V to 5.25 V Current: 5 μA typical @ 2.5 V 100 μA typical @ 5.0 V On Wed, Apr 6, 2011 at 12:54 PM, Joseph Gray<[email protected] <mailto:[email protected]>> wrote: Yes, a UPS isn't the most efficient method of running the GPSDO. It was an expedient until the day I run it on batteries. As for backing up the Oncore, power outages are not the only reason. I may need to power down the GPSDO to add mods or other reasons may arise. Having the almanac stored will help. I would still like to know if using a supercap is ok. They are made for memory backup, so why couldn't I use one for the Oncore? I have a few different values on hand. Joe Gray W5JG _______________________________________________ time-nuts mailing list -- [email protected] <mailto:[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] <mailto:[email protected]> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
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