At present, "method 3" remains unimplemented. Fortunately the TCXO's
uncorrected drift is already less than +/- 0.5 PPM from 0 to 50 C.
> Hi Folks,
>
> Been kicking around putting the 0.5PPM TCXO in my K3. After doing
> some reading a question or two arises. The instructions sheet(s)
> for the TCXO mentions using method 1,2 or 3 in the K3 manual to set
> frequency. The K3 manual does not have a method 3 as I can find.
> I've checked the reflector archive and found there is a data input
> feature in the K3 utility for inputting data received with the
> TCXO. I think this equals method 3. Someone make a note to change
> instructions/manuals if needed.
>
> My question is do I need to do a method 1 or 2 before doing the data
> input? Method 1 is to use a freq counter. My freq counter is only
> about +/- 10 Htz depending on variables. Method 2 is zero beat. By
> ear the best I can get is about +/- 25 Htz. How close do I need to
> get with method 1 or 2 (if needed) before inputting the data?
>
> Second question, will the 0.5PPM TCXO eliminate the hysteresis I see
> during RTTY? Depending on whether I tune to a signal from low to
> high or high to low I can see 10+ Htz difference in the signals
> frequency. Or, are other factors at work?
>
> Constructive thoughts appreciated.
>
> Happy New Year. 73
>
> Jim, W0EM
>
>
>
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