What do you need to adjust before using a microphone for the first time with a transceiver?

Different microphones have varying levels of audio output depending on their internal elements, sensitivity, and impedance. Before using a new microphone, you must adjust the transmitter's microphone gain level to match the new microphone's specific output characteristics. If the gain is set too high, the transmitted audio will distort and cause splatter; if set too low, the modulation will be weak and hard to hear. Other options like AGC (Automatic Gain Control) and noise blankers are strictly receiver functions.