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I have a 830 which I can key up a repeater and hear a slight bit of noise in the background. If I turn on the Inversion it lowers the audio being transmited and amplifies the noise turning it into full blown pops and crack. I can turn the inversion on and off during the hang time and clearly see that the faint background noise is being amplified. The farther I get away from the repeater the worst it gets. Why would the chip be amplifiing this?