[time-nuts] FE-5860A - R232 working but S type commands don't work.

[Bob Camp]

Hi

The 5680 series has some "interesting" firmware for temperature compensation. If you are at one temperature, they are very stable. Move the temperature up or down an bit and the stability is much worse. It appears they aren't very smart about hysteresis in the temp comp code.

Bob

On Jun 23, 2013, at 9:02 AM, Magnus Danielson <magnus at rubidium.dyndns.org> wrote:

> Hi Mark,
> 
> On 06/23/2013 12:15 PM, Mark C. Stephens wrote:
>> The Program, comm_5680.exe is nothing shorter than awesome.
>> I was trying to work out the offset and checksum manually until I came across this program.
>> 
>> I now have my Hadamard Deviation down from 1.15E-10 to 2.75E-12 @100 Seconds.
>> 
>> For me I think is pretty close to as low as I can measure.
> 
> Uhm. What would make the Hadamard change like that? Frequency offset doesn't, linear drift doesn't (since it is Hadamard, first degree drift is canceled anyway) so what mechanism got banged to reduce the Hadamard?
> I'm really curious!
> 
>> To whomever wrote this software, you have my eternal thanks :)
> 
> There are some good software out there, aiding us all. :)
> 
> Cheers,
> Magnus
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