In the Dishpass options there is a screen to enter a specific channel number for the timer. How do you enter an OTA sub channel number, for example 15.01, 15.02, etc. I can't see how to enter the decimal point. Same is true for tuning to a channel from the keypad. There is no way I can see to tune directly to a sub channel. It seems you can only get to them by using the guide. Am I missing something?