[time-nuts] Re: TRAK Systems 8812

[paul swed]

Marco I strongly speculate that the 40 pin chip and the two below it may be
an optional gpib going to the header. It just sort of typically looks like
that layout. Total guess.
Regards
Paul
WB8TSL

On Sat, Sep 17, 2022 at 5:22 PM marco bartoli via time-nuts <
time-nuts at lists.febo.com> wrote:

> Even if I receives the six satellites correctly, apart from the week roll
> over issue, I never have the LOCKED led on the front panel.
> So seems PLL circuit doesn't work at all.
> If I try to set new value from the terminal  I got ok message as response,
> but on the display ( DAC REF 2050 OSC CAL OK) .. I did not find any DAC,
> and this is the reason why the reference voltage on the rubidium didn't
> change
> Since some ic are not in place, just the socket, I am start wondering if
> this are optional or not.
>
> Attached a picture of my 8812 main board, where some ic seems.to miss.
>
> U12, U25, U45, U46.
>
>
> Can some good soul, send me a picture or tell me which ic should be in
> place ??
>
> Thank You indeed
>
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