[time-nuts] ***SPAM*** Re: ***SPAM*** Motorola Oncore UT+ firmware upgrade & backup power questions

Mike Cook michael.cook at sfr.fr
Sun Mar 15 02:36:28 EDT 2015



> Le 14 mars 2015 à 19:01, Pete Stephenson <pete at heypete.com> a écrit :
> 
> On Sat, Mar 14, 2015 at 12:56 PM, Mike Cook <michael.cook at sfr.fr> wrote:
>> 
>> 
>>>> If true, what is the maximum current that can be
>>>> safely supplied by the pin? As above, is it safe to use a
>>>> non-rechargeable battery like a CR2032?
>>> 
>>> I have a couple of UT+ receivers which were not equipped with batteries and I used a CR2032 for backup without any issue. They were disconnected sometimes for considerable periods on a number  of occasions and the saved data was always accessible on power up.  I don’t know how long a battery like that lasts. I have one, powered off, still with the battery in circuit that I pulled in 12/2010. Hmmm. might be worth powering it on to see.
>>> 
>> 
>>  Well, I dug it out and checked the voltage across the CR2032. Down to 2.8volts after 4yrs 3mths. Connected up the receiver ad powered up.
>> It came up in position hold mode with the coordinates that were stored in 2010. 1PPS is on but I am only seeing 2 sats and am not to sync’d to UTC. I think the almanac may be no good. I’ll leave it a while and see if t recovers.
>> 
>> Anyway. Using a CR2032 is OK, at least with my hardware and you get backup for at least 4 years.
> 
> Fantastic. Just what I wanted to hear. Thanks for checking.

  Probably was a bad almanac . Maybe in testing, Motorola hadn’t figure the receiver could be off for years . I had to reset the receiver. 
But OK after that. BTW that was firmware 3.2. 

> 
> Also, my apologies for sending a blank reply to the list a moment ago.
> 
> -- 
> Pete Stephenson
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.


More information about the time-nuts mailing list