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3206: AC coupling not working on B channel

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3206: AC coupling not working on B channel

Postby clivem » Thu Dec 03, 2009 12:22 pm

We bought a 3206 on 28/11/2008, so it is just over a year old. It was purchased solely for the purpose of having a portable scope for debug purposes at customer sites, rather than a bench scope. I think prior to yesterday it has only been used once and on that occasion only channel A was used.

Yesterday I had cause to take the scope out to a customer site and use both channels. What a frustrating time I had! For the first time channel B was used. It doesn't matter whether the software is set for AC or DC coupling on channel B, it is DC coupled. (At the time I was trying to measure an 1V AC waveform 'riding' 6V DC).

Second issue - one of the passive probes provided with the scope has an poor connection, (somewhere in the barrel of the probe), for the ground return. (Again, this probe was never used before yesterday.) Trying to measure voltage with an R to ground that varied between several ohms and infinity, depending on how the probe was held and pressure applied to the barrel.... well, let's just say I wasted more time due to that than I should have done!

Is there any additional testing that I can do with regard to the lack of AC coupling for channel A? Is this a hardware fault? The scope probe - not so concerned about this, but would be nice to have it replaced.
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Re: 3206: AC coupling not working on B channel

Postby PeterF » Fri Dec 04, 2009 12:20 pm

Hi,
You are still well within warranty so there is no problem returning it for repair. I will pick up your ticket on Help-desk.
PeterF.
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Re: 3206: AC coupling not working on B channel

Postby clivem » Fri Dec 04, 2009 12:23 pm

Thanks, Peter.
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