Referencing Page 55 of the 6400M User Guide 2.1.30 regarding Mic Profile Fields.
Question: What is the "Monitor Pan(L/R)" referencing.
Observation: I have only found 3 instances of L/R controls on the 6400M Screen
1st is on the Transmit Menu accessed by pressing the Power # on the touch screen. There is an L/R slicer to the right of the AGC setting box.
2nd is on page 59 of the manual under CW Transmitting on the Phone/CW Menu below Sidetone there is a line which is labeled Pan: and has a L/R Slider.
3rd is on page 118 of the manual under the Audio Menu under the Slice A there is a slider under Volume which is labled Pan: and has an L/R slider.
If I had to guess I would say it is the slider on the slice on page 118 under audio but would like someone to confirm it.
I will investigate more when I get home just thought someone may know from experience which L/R slider it is which is related to the Mic Profiles.