[time-nuts] NTGS50AA, better than Thunderbolt

Bruce Griffiths bruce.griffiths at xtra.co.nz
Sun May 20 19:29:41 UTC 2012


Mark Sims wrote:
> It appears to be the same as the other one (which has an unreadable label).  This one is marked Trimble 0001-262T  34310-T2.
>
> So far it appears to be oblivious to external temperature changes.  I don't know about its phase noise.   The other unit had been running 24/7 for several weeks.  It settled in to a VERY flat line aging curve...  like pretty much zero aging and zero temp coefficient.
>
> The Trimble oscillator in a Tbolt has a horrendous temperature coefficient (DAC voltage tracks the temp sensor reading very closely) and a rather pronounced aging curve (DAC voltage plot is sloped... very constant slope when active temperature control is used)
> ---------------------
> Which OCXO did you get in this one? 		 	   		
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>    
Which version of the TBolt?
The one with the 37265 OCXO ?

Bruce




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