Trimble Outdoors R7 - Manual (Page 157)

Trimble R7/R8 GPS Receiver User Guide 1 4 5
Software Utilities 1 6
Tr
imble R8 Operation
5. Select Configure Radio and click Next .
The Frequency Selection window appears:
6. In the Wireless Format group, select the appropriate channel and
wireless mode. The Wireless Mode must be the same for all
radios in your network.
7. In the Specify Frequency field, enter the frequency you require.