Hi,
Well, there can be steerable "pots", DACs, DDSes and other similar
settings, but it may need the control which has not been left for either
users or service stations. This is sufficient to make enough boards go
through factor testing and out as sold products.
We didn't use to have requirements on this service degree on
instruments, since we used to have it anyway, but maybe there needs to
be such requirements about service-ability over time. If enough
govrement and industry adopt such rules, the market motivator may be
there. However, I see no such force today.
It's hard to show what the bottom line cost of different approaches is.
So... WAS.
Cheers,
Magnus
On 01/16/2015 04:48 PM, paul swed wrote:
Chuck if its not a totally integrated PLL board then you might reverse
engineer it and go from there.
As Bob says thats harder and harder to do because adjustments are done in
software and theres a big black chip with no clue these days. Technically
speaking WAS (we are screwed). :-) Or in a sentence it WAS working.
Regards
Paul
WB8TSL
On Fri, Jan 16, 2015 at 7:05 AM, Bob Camp <kb...@n1k.org> wrote:
Hi
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 …
Bob
On Jan 16, 2015, at 12:27 AM, Chuck Forsberg WA7KGX <c...@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 c...@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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