In the PTP 820(x) GUI, navigate to the Radio Parameters page by selecting Radio/Radio Parameters. For PTP 820C/G, select the radio you want to configure and click Edit and the Radio Parameters page will open. For PTP 820S, the Radio Parameters page opens immediately when you select Radio/Radio Parameters. Scroll to the Frequency Control (Local) section of the Radio Parameters page.
The frequency parameters can be set for each radio channel according to the frequency plan. Press Apply to activate the configuration changes.