[time-nuts] Re: What phase variations to expect in a DMTD due to temperature fluctuations?

[Lux, Jim]

On 10/24/22 12:49 PM, John Miles via time-nuts wrote:
> The 1 ps/C figure is typical of most components other than magnetics.  Some
> RF transformers clock in at 10 ps/C or more, and some don't seem to have
> much of a phase tempco at all.  And as Javier points out, the choice of
> cabling can have a big influence as well.
>
>   


We didn't measure it separately for our L-band LNA/BPF system, but I'd 
be willing to bet that it's the filter that dominates the time delay 
tempco.  Changes in L and C with temperature are well known, and changes 
in tuning will change the delay.

In our system we're looking for uncertainties << 1ns, over 0-40C 
temperature range, so 30 ps/K is a big number.