On Wed, 19 Jan 2011 11:47:25 -0500, "Josh Koffman" said:

> It's doing a few things that I think are weird, they may or may not
> all be related. First off, the output seems to be wrong. When I scope
> the output, I only really see pulses when I engage the variable DC
> offset, and then they are offset a few volts negative. Nothing I can
> do can get them positive again. Second, I can't seem to vary the
> frequency. When I change ranges with the pushbuttons, I see that I'm
> in the right range, but the frequency dial seems to do nothing. I am
> able to alter the pulse width though. Third, I can't get the sweep
> function to work. I figure this might be related to the last one, or
> could just be not really knowing how it works. I find it strange there
> would be absolutely no change though.

Hi Josh,

I don't know that unit, but I would look for the problem fairly close to
the output jack, circuitry-wise. The output buffer, or some fusible
component in the output attenuator switch circuit, or power supply for
the output buffer. I have a Wavetek function generator that has a fuse
right before the output attenuator and it died one day for seemingly no
reason, with similar symptoms to what you describe. High frequency edges
would sort of make it out of the unit in pulse mode, nothing in sinewave
mode.

Cheers,

Bob

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