prov:value
| - Each of stations ST31, ST32, . . . , ST3N may vary the coupling ratio of an associated coupling device A31,A32, . . . , A3N, to an optional value by applying to the associated device, control signals C31, C32, . . . , C3N. The control signals may depend on such factors as transmission and reception state, level of received signals, state of the associated station, and the like.
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