Ad Hoc Mode     

In this mode, you can communicate directly with other PSP™ systems. To establish a connection in ad hoc mode, the PSP™ systems must either be set to [Automatic] or to the same channel. Usually set this option to [Automatic]. For details, refer to the instructions supplied with the software compatible with ad hoc mode.

Automatic Automatically switches to the best channel for communication
Ch 1, Ch 6 or Ch 11 Communicates using the specified channel