Canon Speedlite Transmitter ST-E3-RT Instruction Manual - Page 24

Wireless Settings Scanning the Master Unit Transmission Channels to Set You can scan the radio reception status and set the master unit's transmission channel automatically or manually. When the channel is set to "AUTO", the channel with the best reception signal is automatically set. When setting the channel manually, you can set the transmission channel again while referring to the scan results. Scanning while "AUTO" is set Run the scan. Press function button 4 to display . Press function button 3 . X The channel is reset to one with a good reception signal. Scanning while Ch. 1 to 15 is set 1 Run the scan. Press function button 4 to display . Press function button 3 . X The radio reception status is displayed in a graph. The higher the peak of the channel in the graph, the better the radio reception signal. 2 Set a channel. Turn to select a channel from Ch. 1 to 15. Press the button to set the channel and return to the shootingready state. 22