[time-nuts] FE-.5680A trimming resolution

Bob Camp lists at rtty.us
Sun Jan 29 15:41:50 EST 2012


Hi

If you try to do full scale, check the range of your VCXO first. The digital test is much easier if you already know where your VCXO stops tuning.

Bob



On Jan 29, 2012, at 1:45 PM, Javier Herrero <jherrero at hvsistemas.es> wrote:

> I'm now gathering the unit self-updating of DDS data, that will take somewhat long... so I will try later or tomorrow. Since we have seen that the DDS values are reported back in a response to a command, it is easy to do without the need to have anything hooked to the SPI bus :)
> 
> Regards,
> 
> Javier
> 
> El 29/01/2012 19:37, Scott Newell escribió:
>> At 05:45 AM 1/29/2012, Javier Herrero wrote:
>> 
>>> For example, the following data has been gathered:
>>> 
>>> Serial offset 00 00 00 00
>>> DDS A word: 44 02 62 F6 = 1141007094 = 5 313 228.32219 Hz
>>> DDS B word: 43 FD CC 8E = 1140706446 = 5 311 828.32085 Hz
>> 
>> Can you do a test at +/- fullscale offset as well?
>> 
>> This is a very exciting discovery.  Nice work!
>> 
> 
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