Provide information about the RAD audio channels. The numbers 1 through 8 at the top of the front panel correspond to the RAD ports 1 through 8 on the back of the EXP1x. For example, the LEDs for number 1 provide information about the RAD connected on port 1.
Under each RAD number are LEDs for four audio channels, two input and two output. These represent the maximum number of channels a RAD is capable of transporting. However, not all RAD models use all four channels. For example, the RAD1 model provides two microphone inputs, so for that model, only the two columns of indicators labeled IN would be active.
These LEDs provide information on the following: