I'm confused on how to use ILS landing. I've watched a bunch of youtube video's, I understand how to use most of the controls. I have a problem with the ILS not guiding me to the runway and I'm sure it's because of a frequency issue. What am I supposed to enter into Nav1 when the assigned runway I am to land on is a frequency of 111.75 but the radio will only allow me to go to 111.50 or 111.100 and there's nothing in between, is this why the plane never intercepts the guide slope? How do you put the right frequency in if it's impossible to dial it in?