Balance return loss

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