Sennheiser System 2015 Notice D'emploi page 31

Switching between the channels
CHAN
Via the "CHAN" menu, you can switch between the released channels. This
can be necessary when the selected channel is subject to interference.
With the 2015 System, a transmitter can be received by several receivers on
the same frequency. In this case, it may be necessary to switch to a channel
that is released on all receivers.
Always set the transmitter and the receiver(s) of a transmission link to the
same channel. For multi-channel operation, only use the released channels in
one channel bank and only use the channel banks "1" to "8" since these
accommodate fixed preset frequencies which are intermodulation-free.
Exiting the operating menu
EXIT
Via the "EXIT " menu, you can exit the operating menu and return to the
standard display.
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