[time-nuts] 53230A input channel fault?

[Anders Wallin]

A colleague of mine had seen this exact same behavior on another 53230A.
The problem is a narrow trace right after the CH1 BNC input.
http://www.anderswallin.net/2014/11/53230a-counter-input-channel-fix/

There might be some chemical corrosion going on, since the other counter
that experienced this problem had definitely not been subjected to
overvoltage or other abuse. Or perhaps it's a mechanical issue where the
BNC-connector over time bends the PCB+trace. The BNCs don't appear
mechanically anchored to the front-panel, they are just soldered to the PCB
and stick out through holes in the front panel.

We have one of the 100ps models and probably a third 20ps model also - time
will tell if these will break in the same way...

Agilent/Keysight - are you listening?!? fix it please :)

Anders


> Hi all,
> >
> > I have a 53230A that behaves differently on ch1 and ch2.
> >
> > With ch2 at DC/1Mohm/postive-slope/1V it triggers ok on my PPS signal and
> > shows e.g. a pusle-width measurement etc.
> > The same signal connected to ch1 fails to trigger.
>