[time-nuts] My NTGS50AA failed

EB4APL eb4apl at cembreros.jazztel.es
Wed Nov 12 19:33:10 EST 2014


Thank you, I found this very enlightening.  Now I have to find the 9.7 
KHz pulses, no luck so far.

Best regards,

El 12/11/2014 a las 7:34, Charles Steinmetz escribiĆ³:
> Ignacio wrote:
>> I'm not very sure that the DAC is working, I suppose that the unit 
>> doesn't measure the DAC output, it reports the DAC commands.  My 
>> voltage figures is what LH reports (so the NTGS50AA reports, probably 
>> what it is trying to do), but the frequency control pin of the 
>> oscillator is stuck at 5.02 V regardless of the supposed (intended) 
>> DAC output, it does not move at all.
> One more thing that could be helpful -- on Nov. 2, 2013 Stewart Cobb 
> posted a description of the DAC operation for a Trimble Thunderbolt 
> ("Thunderbolt tuning DAC theory of operation").  On Jan. 5, 2014 
> someone (no name) posted further information on the same thread re: 
> the Trimble/Nortel 45k.  You can find both posts in the list archives 
> (follow the link at the bottom of this post, then click "time-nuts 
> Archives" on the list home page).
> Best regards,
> Charles
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