Brian,

Check in SSB mode to see if MIC + LINE has been inadvertently turned on.

73,
Don W3FPR

On 12/25/2013 2:30 PM, Brian Alsop wrote:
Please ignore this.  I found a 300 mv SDR audio signal on line in.

I don't understand how it got into the mic input-- it's only selected that way for DATA A. I thought the mike/line in inputs were isolated from one another.

Guess not.  Removing the line-in signal solved the problem.

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