Strange oscilllations are ruining the S/N ratio in my DM4800. I can get any fat channel to produce oscillations at a level of about -50 dBu. They start when I feed some signal into the channel with the equalizer on and continue after the signal is switched off. By tweaking the equalizer settings I can produce any tone. It happens on more than one channel simultaneously, so my DM has actually turned into a 48-tone polyphonic synth Oscillations stop when I switch off the equalizer and don't start again as long as there's no input signal. Now I know that there can't be oscillation unless there is some sort of feedback, but I can't imagine what can cause this.
I hope someone can help!
Frans
I hope someone can help!
Frans