The temperature is the electronics temperature. When I put the cover on my red-boxed unit, the temperature went up about 8 C. This would not have happened if them temp was inside the thermostatically controlled oven. ---------------------------------------- _________________________________________________________________ Making the world a better place one message at a time. http://www.imtalkathon.com/?source=EML_WLH_Talkathon_BetterPlace

From: Mark Sims <holrum@hotmail.com> Subject: Re: [time-nuts] Thunderbolt - temperature Date: Fri, 11 Jul 2008 21:23:20 +0000 Message-ID: <BLU125-W54E011757266C1EF374E70CE900@phx.gbl> > > The temperature is the electronics temperature. When I put the cover on my red-boxed unit, the temperature went up about 8 C. This would not have happened if them temp was inside the thermostatically controlled oven. The temperature in the oven would also shift, but not by that amount. The numbers I have seen seems to indicate electronics temperature, and this is more usefull if a single temperature is given. Cheers, Magnus

Magnus Danielson wrote: >> The temperature is the electronics temperature. When I put the cover on my red-boxed unit, the temperature went up about 8 C. This would not have happened if them temp was inside the thermostatically controlled oven. >> > > The temperature in the oven would also shift, but not by that amount. The > numbers I have seen seems to indicate electronics temperature, and this is > more usefull if a single temperature is given. > > Cheers, > Magnus > > The ambient air temperature at a specific point within the enclosure or the temperature of a specific component? i.e. any pictures of the temperature sensor and its location. Are the apparent rapid temperature fluctuations observed by some real or are they the result of inadvertent detection of an intermittent burst of EMI from a switching supply? Bruce

Has anyone established a recommended adjustment window for the Thunderbolt's 10MHz oscillator free-running frequency? Put another way, does anybody have a feel for how far from "nominal 10 MHz" the free-running frequency can be before it in some way (if at all) degrades "locked" performance? I'm assuming that, after power-down, the box looses its 'holdover' memory and, upon re-power, reverts to zero hold-over correction? Or does the box remember its last hold-over offset correction despite a power loss? Cheers, Greg