[time-nuts] 53230A input channel fault?

Anders Wallin anders.e.e.wallin at gmail.com
Wed Nov 19 09:18:49 EST 2014

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.

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 :)


> 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.

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