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

[Chris Albertson]

I don't know about firmware but I do use the CR2032.   The super cap would
work too but an uncharged cap look like a short circuit.

On Fri, Mar 13, 2015 at 1:33 PM, Pete Stephenson  wrote:

> Hi all,
>
>
> 2. The two Oncores I purchased were not factory-equipped with a
> rechargeable battery. The user guide says that one can apply "Externally
> applied backup power (< +5V)" to pin #1 in order to maintain data in RAM
> in case the main power is interrupted.
>
> Can one use a common non-rechargeable coin-cell battery like a CR2032 to
> provide this backup power, or does it need to be a rechargeable battery?
> Will a CR2032 or the Oncore itself be damaged if such a cell is used?
>
> 3. Tom says at
>  that
> in addition to being an input for external backup power, pin #1 on the
> Oncore provides current-limited 5V for battery/supercapacitor charging.
>
> Is this true for Oncore receivers that were not factory-equipped with a
> rechargeable battery? 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?
>
> If pin #1 can supply power and I wanted to charge a supercapacitor from
> that pin, would I also need to include a current-limiting resistor to
> prevent the Oncore from sourcing too much current?
>
> I could find nothing in the user guide that says that pin #1 can be used
> for charging a battery.
> <
> http://www.synergy-gps.com/images/stories/ShopTalk/9backup_battery_considerations.pdf
> >
> is unclear on whether or not pin #1 can be used for charging batteries,
> or if it's safe to use non-rechargeable cells like a CR2032 coin-cell
> battery.
> 4. The user manual and the battery backup considerations document says
> that the Oncore UT+ draws 5-100 uA (15uA typical) from the backup power
> source. Is this a constant draw, even when the main 5V power is being
> supplied to the unit, or does the unit only draw current from the
> battery when the main power is interrupted?
>
> I'd measure it directly, but none of my multimeters are able to
> accurately measure microamperes.
>
> Thank you all for your time and assistance. If any other time-nuts
> happen to make it to Bern, Switzerland in the next few years, please let
> me know and drinks are on me.
>
> Cheers!
> -Pete
> ___
> 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.
>



-- 

Chris Albertson
Redondo Beach, California
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Re: [time-nuts] Opamp datasheet noise specs and their relation to phase noise

[Charles Steinmetz]

Stephan wrote:


Any good texts on the subject that you can recommend?


I don't own any texts with comprehensive discussions of AM to PM 
conversion or low-PN design.  The best sources will most likely be 
papers.  Some good search terms are "AM to PM conversion" (or "AM/PM 
conversion") and "low phase noise design" (or "low PN design").


Here are a few to get you started:

The Art of Phase Noise Measurement (Scherer, Hewlett Packard, 
1985)  


Phase Noise and AM Noise Measurements in the Frequency Domain (Lance, 
et al., 1984) 


RF and Microwave Phase Noise Measurement Seminar (HP, 1985) 



Phase Noise Measurement Using the Phase Lock Technique (Motorola 
AN1639, 1999) 


Phase Noise in RF and Microwave Amplifiers (Boudot, Rubiola, 2010) 



Origin of 1/f PM and AM Noise in Bipolar Junction Transistor 
Amplifiers  


Guidelines for designing BJT Amplifiers with Low 1/f PM and AM 
Noise  


PM Noise Generated by Noisy 
Components  



Best regards,

Charles



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

[Mike Cook]

> Le 13 mars 2015 à 21:33, Pete Stephenson  a écrit :
> 
> Hi all,
> 
> After a few years of using a Garmin GPS 18x LVC for timekeeping, my
> budget now allows for some upgrades and I had a small field day on eBay:
> I acquired a Trimble Thunderbolt, two Trimble Resolution Ts, and two
> Motorola Oncore UT+s (seconds purchased for spares and testing).
> 
> The documentation for the Trimbles is clear, but I had several questions
> regarding the Oncores that I was unable to find clear answers to online.
> I would be very much obliged if the folks here might be able to help.
> 
> 1. Is it possible to upgrade the firmware on the Oncore UT+? If so,
> where can one acquire the latest firmware (3.2, I believe) files and how
> would go one about installing it? Is this something WinOncore can do? I
> ask because the receivers on eBay are of varying vintage and may not be
> fully upgraded.
> 

The WinOncore12 application has an option to download firmware but I have not 
been able to find a source of firmware. 

> Since Motorola exited the GPS business a relatively long time ago,
> firmware updates and directions have proven difficult (impossible so
> far) for me to find.
> 
> 2. The two Oncores I purchased were not factory-equipped with a
> rechargeable battery. The user guide says that one can apply "Externally
> applied backup power (< +5V)" to pin #1 in order to maintain data in RAM
> in case the main power is interrupted.
> 
> Can one use a common non-rechargeable coin-cell battery like a CR2032 to
> provide this backup power, or does it need to be a rechargeable battery?
> Will a CR2032 or the Oncore itself be damaged if such a cell is used?
> 
> 3. Tom says at
>  that
> in addition to being an input for external backup power, pin #1 on the
> Oncore provides current-limited 5V for battery/supercapacitor charging.
> 
> Is this true for Oncore receivers that were not factory-equipped with a
> rechargeable battery?

I don’t recall detecting any voltage on that pin.

> 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.

> 
> If pin #1 can supply power and I wanted to charge a supercapacitor from
> that pin, would I also need to include a current-limiting resistor to
> prevent the Oncore from sourcing too much current?
> 
> I could find nothing in the user guide that says that pin #1 can be used
> for charging a battery.
> 
> is unclear on whether or not pin #1 can be used for charging batteries,
> or if it's safe to use non-rechargeable cells like a CR2032 coin-cell
> battery.
> 4. The user manual and the battery backup considerations document says
> that the Oncore UT+ draws 5-100 uA (15uA typical) from the backup power
> source. Is this a constant draw, even when the main 5V power is being
> supplied to the unit, or does the unit only draw current from the
> battery when the main power is interrupted?

Unknown.

> 
> I'd measure it directly, but none of my multimeters are able to
> accurately measure microamperes.
> 
> Thank you all for your time and assistance. If any other time-nuts
> happen to make it to Bern, Switzerland in the next few years, please let
> me know and drinks are on me.
> 
> Cheers!
> -Pete
> ___
> 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.
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Re: [time-nuts] Lady Heather

[Adrian Godwin]

The ttyS* devices should be owned by root and be in the dialout group, eg

crw-rw---T 1 root dialout 4, 64 Feb 28 08:31 /dev/ttyS0
crw-rw---T 1 root dialout 4, 65 Feb 28 08:31 /dev/ttyS1
crw-rw---T 1 root dialout 4, 66 Feb 28 08:31 /dev/ttyS2
crw-rw---T 1 root dialout 4, 67 Feb 28 08:31 /dev/ttyS3

Rather than chowning them to your username, put your user in the dialout
group.





On Fri, Mar 13, 2015 at 8:47 PM, Dave Mallery 
wrote:

> Lady Heather lives on linux (ubuntu 14-10,  amd64)!
>
> as usual, the serial line connection to COM1 lived up to its reputation for
> stubbornness.
> i have to change the ownership of /dev/ttyS0 back to my username after
> every boot.
>
> previously, i had one of those lil 2-line displays from china.  now i am
> drowning in numbers.
>
>
> did anyone ever document the screen?
>
> many thanks
>
> dave k5en
>
> On Wed, Mar 11, 2015 at 9:07 PM, Dave Mallery 
> wrote:
>
> > thanks Chuck!
> >
> > i will continue the installation process (new machine with quirks).
> >
> >
> >
> > On Wed, Mar 11, 2015 at 7:11 PM, Chuck Harris 
> wrote:
> >
> >> I Do.  She works with wine on linux, and likes it!
> >>
> >> -Chuck Harris
> >>
> >> Dave Mallery wrote:
> >>
> >>> hi
> >>>
> >>> does anyone have the lady running on WINE under Linux??
> >>>
> >>> On Wed, Mar 11, 2015 at 6:13 PM, Paul Berger 
> wrote:
> >>>
> >>>  I have also used LH with a Thunderbolt 'E' and did not have any
> issues,
>  however I have not turned on the E for some time now.
> 
>  Paul
> 
> >>> ___
> >> 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.
> >>
> >
> >
> >
> > --
> > Dave Mallery, K5EN (ubuntu linux 14.10)
> > PO Box 15  Ophir,  OR  97464
> >
> > no gates...
> >   no windows!
> > free at last!
> >   linux counter #64628 (since 1997)
> >
> > "People aren't as dumb as Microsoft needs them to be."
> > --PJ, May 2007
> >
>
>
>
> --
> Dave Mallery, K5EN (ubuntu linux 14.10)
> PO Box 15  Ophir,  OR  97464
>
> no gates...
>   no windows!
> free at last!
>   linux counter #64628 (since 1997)
>
> "People aren't as dumb as Microsoft needs them to be."
> --PJ, May 2007
> ___
> 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.
>
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Re: [time-nuts] Motorola Oncore UT+ firmware upgrade & backup power questions

[Rex]

On UT+ firmware update. I don't think it is possible to update the 
firmware in a UT+.


Back in 2006, time-nuts had a member, Randy Warner, who worked at 
Synergy. In the message linked here

http://www.mail-archive.com/time-nuts%40febo.com/msg02684.html

He describes the firmware update as a factory-only process that could be 
done then for $25. Now I doubt there is any way to get it done. I have 
never heard of any way to accomplish it without unobtanium factory tools 
and images.


If you search in that mail-archive time-nuts section (linked above), for 
the subject "Oncore GPS models", you may find some more information.



On 3/13/2015 1:33 PM, Pete Stephenson wrote:

Hi all,

After a few years of using a Garmin GPS 18x LVC for timekeeping, my
budget now allows for some upgrades and I had a small field day on eBay:
I acquired a Trimble Thunderbolt, two Trimble Resolution Ts, and two
Motorola Oncore UT+s (seconds purchased for spares and testing).

The documentation for the Trimbles is clear, but I had several questions
regarding the Oncores that I was unable to find clear answers to online.
I would be very much obliged if the folks here might be able to help.

1. Is it possible to upgrade the firmware on the Oncore UT+? If so,
where can one acquire the latest firmware (3.2, I believe) files and how
would go one about installing it? Is this something WinOncore can do? I
ask because the receivers on eBay are of varying vintage and may not be
fully upgraded.

Since Motorola exited the GPS business a relatively long time ago,
firmware updates and directions have proven difficult (impossible so
far) for me to find.




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[time-nuts] Centennial Pi Day

[Rex]

This is somewhat time related, so...

Tomorrow is a centennial Pi Day, since the year is 15. Major local 
observation times are just before 9:27 AM or PM.


3-14-15 9:26:54 or for time-nuts 9:26:53.589793... (take it as far as 
you like)


Here's one Pi Day web page,
http://www.chiff.com/home_life/holiday/pi-day.htm

There's also a Wiki page with history, and a search on Pi Day will find 
many more.


Note to Europeans, etc. You have to accept the US-style date format 
(m/dd/yy) or this doesn't work.


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Re: [time-nuts] Lady Heather

[Dave Mallery]

Lady Heather lives on linux (ubuntu 14-10,  amd64)!

as usual, the serial line connection to COM1 lived up to its reputation for
stubbornness.
i have to change the ownership of /dev/ttyS0 back to my username after
every boot.

previously, i had one of those lil 2-line displays from china.  now i am
drowning in numbers.


did anyone ever document the screen?

many thanks

dave k5en

On Wed, Mar 11, 2015 at 9:07 PM, Dave Mallery 
wrote:

> thanks Chuck!
>
> i will continue the installation process (new machine with quirks).
>
>
>
> On Wed, Mar 11, 2015 at 7:11 PM, Chuck Harris  wrote:
>
>> I Do.  She works with wine on linux, and likes it!
>>
>> -Chuck Harris
>>
>> Dave Mallery wrote:
>>
>>> hi
>>>
>>> does anyone have the lady running on WINE under Linux??
>>>
>>> On Wed, Mar 11, 2015 at 6:13 PM, Paul Berger  wrote:
>>>
>>>  I have also used LH with a Thunderbolt 'E' and did not have any issues,
 however I have not turned on the E for some time now.

 Paul

>>> ___
>> 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.
>>
>
>
>
> --
> Dave Mallery, K5EN (ubuntu linux 14.10)
> PO Box 15  Ophir,  OR  97464
>
> no gates...
>   no windows!
> free at last!
>   linux counter #64628 (since 1997)
>
> "People aren't as dumb as Microsoft needs them to be."
> --PJ, May 2007
>



-- 
Dave Mallery, K5EN (ubuntu linux 14.10)
PO Box 15  Ophir,  OR  97464

no gates...
  no windows!
free at last!
  linux counter #64628 (since 1997)

"People aren't as dumb as Microsoft needs them to be."
--PJ, May 2007
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[time-nuts] Motorola Oncore UT+ firmware upgrade & backup power questions

[Pete Stephenson]

Hi all,

After a few years of using a Garmin GPS 18x LVC for timekeeping, my
budget now allows for some upgrades and I had a small field day on eBay:
I acquired a Trimble Thunderbolt, two Trimble Resolution Ts, and two
Motorola Oncore UT+s (seconds purchased for spares and testing).

The documentation for the Trimbles is clear, but I had several questions
regarding the Oncores that I was unable to find clear answers to online.
I would be very much obliged if the folks here might be able to help.

1. Is it possible to upgrade the firmware on the Oncore UT+? If so,
where can one acquire the latest firmware (3.2, I believe) files and how
would go one about installing it? Is this something WinOncore can do? I
ask because the receivers on eBay are of varying vintage and may not be
fully upgraded.

Since Motorola exited the GPS business a relatively long time ago,
firmware updates and directions have proven difficult (impossible so
far) for me to find.

2. The two Oncores I purchased were not factory-equipped with a
rechargeable battery. The user guide says that one can apply "Externally
applied backup power (< +5V)" to pin #1 in order to maintain data in RAM
in case the main power is interrupted.

Can one use a common non-rechargeable coin-cell battery like a CR2032 to
provide this backup power, or does it need to be a rechargeable battery?
Will a CR2032 or the Oncore itself be damaged if such a cell is used?

3. Tom says at
 that
in addition to being an input for external backup power, pin #1 on the
Oncore provides current-limited 5V for battery/supercapacitor charging.

Is this true for Oncore receivers that were not factory-equipped with a
rechargeable battery? 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?

If pin #1 can supply power and I wanted to charge a supercapacitor from
that pin, would I also need to include a current-limiting resistor to
prevent the Oncore from sourcing too much current?

I could find nothing in the user guide that says that pin #1 can be used
for charging a battery.

is unclear on whether or not pin #1 can be used for charging batteries,
or if it's safe to use non-rechargeable cells like a CR2032 coin-cell
battery.
4. The user manual and the battery backup considerations document says
that the Oncore UT+ draws 5-100 uA (15uA typical) from the backup power
source. Is this a constant draw, even when the main 5V power is being
supplied to the unit, or does the unit only draw current from the
battery when the main power is interrupted?

I'd measure it directly, but none of my multimeters are able to
accurately measure microamperes.

Thank you all for your time and assistance. If any other time-nuts
happen to make it to Bern, Switzerland in the next few years, please let
me know and drinks are on me.

Cheers!
-Pete
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Re: [time-nuts] Seeking Racal 9480 Manuals

[Didier Juges]

Not at home right now but if you send me an email with what needs to be done, 
I'll be glad to do it.

Didier KO4BB


On March 12, 2015 6:54:06 PM CDT, Dan Rae  wrote:
>On 3/12/2015 1:47 PM, George Atkinson wrote:
>> Done.
>>
>But you might want to get Didier to correct the file names, they show
>as 
>9840...
>
>Dan
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-- 
Sent from my Motorola Droid Razr HD 4G LTE wireless tracker while I do other 
things.
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