--If it's a scanner that takes crystals, that means you can only receive whatever those ten crystal frequencies are. All ten crystals inside should have a frequency listed on them. Except for possibly tuning a few kc above and below the frequency (not sure if it can be done in a scanner, but I can with my Drake TR-33), you can only receive ten frequencies, no programming. You would have to buy an entirely new crystal if you wanted a new frequency.
We make a living by what we get, we make a life by what we give. --Sir Winston Churchill