Bruce,
What is the starting frequency, and what is the frequency just before the
'End' message?
If the frequency stays at the high end (near 12100 kHz), and does not go
down in frequency, you will have to look at the PLL Reference oscillator and
its control signal which begins at U5 pin 7.
Did your PLL range measure within the expected bounds? What were the actual
frequencies?
Please verify that the frequency starts at the vicinity of 12100 kHz and
state if it decrements any at all during CAL PLL. In the end, you will
likely find the problem is caused by a solder bridge on the Thermistor
board, but a few measurements can confirm whether or not that is the real
source of the problem.
73,
Don W3FPR
> -----Original Message-----
>
> I am trying to do the VCO linearization for the K2 #5713. It start but
> the frequency never goes down nor does the "d" show up saying it is
> setting points. But after 8 Minutes it does say END. Nothing else. I
> do hear signals on 40 but they are nowhere near the same frequency as
> the K2. I do have the probe plugged into TP1 and everything up to this
> point is perfect.
>
> Now for the experts to step in and give me some insite on what
> may be wrong.
>
> 73 Bruce N9BX
>
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