Sennheiser evolution wireless series EM 100 Instruction Manual page 7

The EM 100 G3 stationary receiver
6
Each of the channels in the frequency banks "1" to "20" has been factory-
preset to a fixed frequency (frequency preset).
The factory-preset frequencies within one frequency bank are intermodu-
lation-free. These frequencies cannot be changed.
For an overview of the frequency presets, please refer to the supplied
frequency information sheet. Updated versions of the frequency informa-
tion sheet can be downloaded from the EM 100 G3 product page on our
website at www.sennheiser.com.
The frequency bank "U" allows you to freely select and store frequencies.
It might be that these frequencies are
page 44).
not intermodulation-free (see