The rear panel MODE switches allow the PTX-3 IFB transmitter to accommodate a variety of input source levels by changing the input sensitivity and the pin functions of the input XLR jack. Marked on the rear panel are the most common settings. Each setting is detailed below. Switches 1 and 2 adjust the XLR pin functions while switches 3 and 4 adjust the input sensitivity.
Input types supported are Clear-Com 2-wire input, RTS channel 1 or channel 2, balanced mic or line level inputs.