On 01/25/2013 03:46 PM, stan_katz wrote:
I have an ancient 475 scope which works fine with an external trigger,
but will not trigger on any of the internal sources. Should I start by
reviewing the recent 468 triggering issue thread to get me going? If not,
can anyone recommend a thread I should start with? Of course, I'd be
delighted to receive help on this
what I had on 465Bs the triggering problem is often that
the tunnel diodes
have changed in value.
There are many! threads about this in the
It may be worth your time to try swapping the TDs from the B
with the A section to see if things change.
I had this
problem come up when I was hunting for a process control network
while working in factory in a different country.
I swapped the TDs and the
scope has been near perfect ever since.