You can set the receiver sensitivity when listening to the FM radio.
PLAY/STOP・ENTER.

or
+ to select “DX” or “LOCAL,” and then press
PLAY/STOP・ENTER.
(stop) to exit the menu mode. You can select one of the menu items available.
DX:
Normally, select this setting.
(Initial setting)
LOCAL:
When there is interference or collapsing caused by a intense electric field around the transmitting antenna of the broadcasting station, etc., select this setting.