HP 5328A A-B time interval

[mikeg]

I have a 3528A. All the functions are nominal except for the A-B and A-B average.

History;
I recapped the unit a couple years ago.
Recently I cleaned all the connectors, switches and pots.

The A-B function was and is still showing nothing. I don't know how long it's been defective it isn't a feature I've ever used until recently.

The marker outputs are functional and look good.

Before I tear into this further and create a mess on my bench, anyone have any experience, suggestions, ideas please?

Thank You
Mike

[factory]

Is that model number correct? as 3528A is a very old current probe.

David

[mikeg]

Apparently I can't type.

5328A

[factory]

OK, it happens, you should be able to correct the thread title by editing the first post?

I'm not that familiar with the 5328A counter, I'm more interested in the older stuff, but I did buy a one some time ago, it has none of the options and someone removed the GPIB board, it's still waiting for me to replace the IEC inlet which I ruined during eviction of the RIFAs.

When you mention A-B, I'm guessing you mean the time interval function (TI)?

Probably would be useful to others reading to know which A/B input module is fitted, there seem to be two variants.

David

[wn1fju]

Did your cleaning also include the main function switch?  If not, I recall that it was pretty easy to remove the whole module and dissect the switch.

[mikeg]

I did clean the main switches.
I haven't had time to do anything more with it yet.
Hopefully this weekend...