[time-nuts] Trimble Thunderbolt E frequency pulling
Al Wolfe
alw.k9si at gmail.com
Tue Nov 24 19:58:55 UTC 2015
Nigel,
Set your counter to high impedance. Then install a T connector on the
input. Then you can install or remove a 50 ohm terminator on the T while
plotting the results. Then you can see how fast the frequency shift is
depending on the load.
AL, k9si
> Switching the impedance at the counter itself resets any plot that's in
> progress, which does introduce some delay, so I put together a small
> switch
> box that could be inserted into the coax and confirmed it's a rapid
> effect
> that's unlikely to be thermal.
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