12 FT-817ND Operating ManualPWR SwitchPress and hold in the switch for one second to turn to the transceiver on or off.AF KnobThe (inner) knob adjusts the receiver audio volume level presented to the internalor external speaker. Clockwise rotation increases the volume level.SQL/RF KnobIn the USA version, this (outer) knob adjusts the gain of the receiver’s RF andIF stages. Using Menu Selection 45, this control may be changed to function as a Squelchcontrol, which may be used to silence background noise when no signal is present. Inthe other versions, its default setting is set to “Squelch.”LOCK KeyPressing this key locks the front panel keys so as to prevent accidental frequency change.V/M KeyPressing this key switches frequency control between the VFO and Memory Systems.TRANSMIT/BUSY IndicatorThis LED glows green when the squelch opens, and turns red during transmit. It alsoglows orange during charging of the FNB-85 (Ni-MH) / FNB-72 (Ni-Cd) battery pack.MAIN DialThis is the main tuning dial for the transceiver. It is used both for frequency tuning aswell as “Menu” setting in the transceiver.F KeyPressing this key momentarily changes the display to show the operating functions avail-able via the , , keys.Press and hold this key for one second to activate the “Menu” mode.FRONT P ANEL C ONTROL & S WITCHES