Re: [time-nuts] Does adjusting ocxo's degrade adev / madev ?

2014-11-27 Thread Charles Steinmetz
Mark wrote: I've long had a nagging suspicion that OCXO's that are not adjusted will in practice have lower ADEV than ones that are tweaked regularly. Several days ago I noticed that one of my 10811's was performing quite well (I believe this is the first time any of 10811's have delivered

Re: [time-nuts] Does adjusting ocxo's degrade adev / madev ?

2014-11-27 Thread Don Latham
Just replaced an ocxo in my ST620 with a Moron ocxo, which had been unpowered for a few years in all probability. It took several days to come to a reasonable equilibrium. In a system with as many components as an ocxo, I suspect that seeking a new equilibrium will take an appreciable time well

Re: [time-nuts] Does adjusting ocxo's degrade adev / madev ?

2014-11-27 Thread Bob Camp
Hi Any time you change the operating point of the sustaining circuit (limiter / amp) in an OCXO, there’s a chance that the drive level changes. For small changes in operating point, (and the absence of perturbations) you rarely will see any impact. For large changes (or tuning onto a perturbati

[time-nuts] Does adjusting ocxo's degrade adev / madev ?

2014-11-27 Thread Mark Spencer
I've long had a nagging suspicion that OCXO's that are not adjusted will in practice have lower ADEV than ones that are tweaked regularly. Several days ago I noticed that one of my 10811's was performing quite well (I believe this is the first time any of 10811's have delivered adev / madev nu