On my mobile radio (xts5000 model II), there is a switch that is attached to the bottom of the channel knob. It is a two position switch and one side is a circle with a line through it and the other is an open circle.
I think it is letter "F" on here. http://business.motorola.com/mobilegov/ ... _FINAL.pdf
I think it is letter "F" on here. http://business.motorola.com/mobilegov/ ... _FINAL.pdf