Canon Speedlite 430EXIII-RT Instruction Manual page 51

Setting the Transmission Channel/Wireless Radio ID
Use the following procedure to set the transmission channels and
wireless radio IDs of the master unit and slave unit. Set the same
channel and ID for both the master unit and slave unit. Note that the
procedure is the same for the master unit and slave unit.
Transmission channel
Wireless radio ID
Set a channel.
1
Press <8>.
Turn <9> to select the channel
symbol, then press <8>.
Turn <9> to select <X> or any
channel between Ch. <Y> and
<\>, then press <8>.
Set a wireless radio ID.
2
Press <8>.
Turn <9> to select the ID symbol,
then press <8>.
Turn <9> to select the position
(digit) to be set, then press <8>.
Turn <9> to select a number from 0
to 9, then press <8>.
Set a 4-digit number with the same
procedure, and select <;>.
When transmission between the
master unit and slave unit is
established, the <D> lamp is lit in
green.
Wireless Settings
51