> From: ktfiz
>
> I've uploaded a short video that shows the problem. Audio
> quality is not great but it should give you a better insight
> into the issue I am having. Hoping someone has an idea of
> what could be wrong.
>
> http://youtu.be/iJbBRya_MlE

The sweep signal is a pure software signal. The only way it can manifest
itself in the hardware is if it is used to modulate one of the six control
voltages that go to the channel. One of the things it can modulate is pulse
width. Therefore, I suspect there is some interaction between the PULSE
WIDTH slider and the PULSE WIDTH MOD slider. It could be a short somewhere,
or a broken ground, or a bad 4051 multiplexer on the panel.

--

Ciao, Paul D. DeRocco
Paul mailto:pderocco@...