IDX CW-7 - Manual (Page 19)

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5. Link mode -UNICAST/MULTICAST
UNI/MULTI switch is used to select the link mode. UNI/MULTI select
switch is located on both TX and RX and must be set in the same mode.
5.1. UNICAST mode (1 to 1 communication)
When UNI/MULTI switch is set to UNI position, CW-7 links in UNICAST
mode. In UNICAST mode, the system communicates only between the TX
and RX with the same serial numbers. The transmission signal is encoded
by 128bit AES encryption therefore it will not be intercepted by other CW-7
nearby.
The pair with the same serial number
2 nd RX unit is not usable
UNICAST operation