[time-nuts] SA22.c and Lady Heather

[Dave Mallery]

hi

machine shop a flake.  retrieving my stuff on monday,

sorry...  now what?

73

dave


On Fri, Sep 8, 2017 at 3:11 PM, Dave Mallery <dave.mallery at gmail.com> wrote:

> hi
>
> i got through the smoke to a machine shop today and should have an
> estimate for eight SA22.c sinks shortly.
>
> dave
>
> On Sat, Sep 2, 2017 at 2:48 PM, Dave Mallery <dave.mallery at gmail.com>
> wrote:
>
>> hi
>>
>> on the 2011 or newer items, they include this link calibration data plot.
>> <http://www.rdrelectronics.com/skip/feb/EC0329.gif>
>>
>> i received a printed one with the unit.
>>
>> dave
>>
>> On Sat, Sep 2, 2017 at 6:55 AM, Mark Sims <holrum at hotmail.com> wrote:
>>
>>> The data that RDR showed was from the SA22.c "w" command.  I think he
>>> was just using a terminal program.
>>>
>>> Attached is a screen dump of Heather doing a software disciplining
>>> algorithm on a SA22.c (using the dev board as an interface).  The 1PPS
>>> reference that I am using is the nosiest one that I had handy (LEA 5T,
>>> indoor antenna,  second 1PPS output... it has over +/- 66 ns of jitter).
>>>
>>> Heather can also calibrate the SA22 / X72 frequency output.  You apply a
>>> 1PPS input,  enter &a and a sample count (default 1800 seconds).  It then
>>> calculates the drift rate from a linear regression trend line and sets the
>>> device DDS tuning word.  The resolution of the DDS in the device is around
>>> 2.5E-12 / count.
>>> _______________________________________________
>>> time-nuts mailing list -- time-nuts at febo.com
>>> To unsubscribe, go to https://www.febo.com/cgi-bin/m
>>> ailman/listinfo/time-nuts
>>> and follow the instructions there.
>>>
>>
>>
>>
>> --
>> Dave Mallery, K5EN                 (ubuntu linux 16-10)
>> PO Box 15                              Ophir,  OR  97464
>>
>>       linux counter #64628 (since 1997)
>>
>>
>>
>>
>
>
> --
> Dave Mallery, K5EN                 (ubuntu linux 16-10)
> PO Box 15                              Ophir,  OR  97464
>
>       linux counter #64628 (since 1997)
>
>
>
>


-- 
Dave Mallery, K5EN                 (ubuntu linux 16-10)
PO Box 15                              Ophir,  OR  97464

      linux counter #64628 (since 1997)