When the other three interpreter booths select NORM, they are listening to the original floor signal and their voice is being sent to their transmitter. When they select RELAY, they are listening to the pivot interpreter booth (usually speaking English) and their voice is sent to their transmitter.
With J1 closed on all IC-1’s, the floor signal will feedthru the NORM OUT connection to the Transmitter when the interpreter selects OFF. This allows the listeners to hear the floor language directly when it is their native language.
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