Why Frequency entry on a modern transceiver is done either by typing the digits directly on the front-panel or microphone keypad, or by turning the VFO (variable frequency oscillator) knob to tune up and down the band. Both methods set the same thing: the VFO frequency the radio transmits and receives on. Memory channels are a third way, but they just recall a frequency that was entered by one of these methods.
Watch out CTCSS and DTMF encoders generate subaudible or touch-tone tones for repeater access and control, and automatic frequency control makes small corrections to hold a signal centered, so none of them let you choose an operating frequency.
Type it on the keypad or spin the VFO knob. Tones and AFC do not pick the frequency.
Enter a frequency like a phone number: punch it on the keypad or spin the dial (VFO knob).