Data transmit audio passband ?


I am new to the K3. I am using Fldigi connected  line in and line out, its an older K3.  I discovered that when in data mode I only get output with the waterfall selected from about 1000hz to 2000hz rolling off sharply below and above.  In USB can select anywhere on the waterfall and get uniform audio/output levels.

Is this normal ?  Any tips or pointers are appreciated.

Thanks and 73

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