Definition 7: The Gain of a branch is the transmission function of that branch when the transmission function is a multiplicative operator. For example, 433 is the gain of the self-loop if A3 is a constant or transfer function Definition 8: The Path Gain is the product of the branch gains encountered in traversing a path For example, the path gain of the forward path from X,to x to x, to x, is Definition g: The Loop Gain is the product of the branch gains of the loop. For example, the loop gain of the feedback loop from X2 to X, and back X2 is A32 A23Definition 7: The Gain of a branch is the transmission function of that branch when the transmission function is a multiplicative operator. For example, is the gain of the self-loop if is a constant or transfer function. Definition 8: The Path Gain is the product of the branch gains encountered in traversing a path. For example, the path gain of the forward path from, to to to is Definition 9: The Loop Gain is the product of the branch gains of the loop. For example, the loop gain of the feedback loop from to and back is A33 A33 X1 X 2 X 3 X 4 . 2 A32 A23 X X 3 X 2