[time-nuts] While we are talking about Z3801's
Bob kb8tq
kb8tq at n1k.org
Sun Mar 4 21:55:50 EST 2018
Hi
Basic troubleshooting:
Check the regulator output voltages and repair as needed.
Basic serial troubleshooting:
Bring up a terminal program, loop back the serial with a jumper, see if you have
a connection.
If you do, issue basic commands, see what happens.
Switch to likely baud rates repeat basic commands.
If still nothing, put a scope on the RX output of the serial chip in the 3801. Do the same
for the TX input of the same chip.
…… dig on in from there.
Bob
> On Mar 4, 2018, at 9:22 PM, Hal Murray <hmurray at megapathdsl.net> wrote:
>
>
> wpxs472 at gmail.com said:
>> Hal, I can't communicate with it. That has been gone for a while now.
>
> I assume it worked at some point. Did talking to it stop working at the same
> time the frequency stopped tracking? If so, I'd guess the CPU inside has
> stopped working and isn't setting the DAC correctly.
>
>
> --
> These are my opinions. I hate spam.
>
>
>
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