In telecommunication, the term balance return loss has the following meanings:
1. A measure of the degree of balance between two impedances connected to two conjugate sides of a hybrid set, coil, network, or junction.
2. A measure of the effectiveness with which a balancing network simulates the impedance of a two-wire circuit at a hybrid coil.
Source: from Federal Standard 1037C and from MIL-STD-188
