9, I'm going to guess, is S9, and is a measure of signal strength. Shirley you all remember the RST code from when you studied for your technician exam... RST standing for Readability, Strength, and Tone... tone is for CW, right? So the best it could ever be on voice is 5-9, where readability is a scale of 1-5, and strength is a scale of 1-9. If you ever call out for a radio check and someone calls back you're 5-9 consider that a compliment..
82 fj40, 99 uzj100, 06 gx470
05 525EXC, 01 XT225, 07 TTR90, 07 CRF50