[time-nuts] Advantest U3641 problem

Bob Camp kb8tq at n1k.org
Fri Jan 16 07:05:04 EST 2015


Usually (but not always) these are VCO drift issues. If you can spot a tuning adjust on that board you are lucky. A lot of this stuff is now done “no adjust” boards. They just swap out the board …

> On Jan 16, 2015, at 12:27 AM, Chuck Forsberg WA7KGX <caf at omen.com> wrote:
> My Advantest spectrum analyzer now comes up with an
> error 900 complaining about no PLL lock.
> This would appear to be a fault on the PLL board but the
> brain damaged Advantest service manual has no schematics
> for the boards.
> Any suggestions other than don't buy anything from Advantest?
> -- 
>     Chuck Forsberg WA7KGX   caf at omen.com   www.omen.com
> Developer of Industrial ZMODEM(Tm) for Embedded Applications
>  Omen Technology Inc      "The High Reliability Software"
> 10255 NW Old Cornelius Pass Portland OR 97231   503-614-0430
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