frequency range

i am trying to program a frequency 173.39625 in my kenwood tk 2170 and after i type it in it changes. this is the first frequency i have seen with 8 numbers.. any help would be appreciated..

Ok, after manualy entering the following frequencies and talk groups I now am scanning Liberty CO Tx Sheriff's new traffic and it is working great. here are the frequencies and talkgroups. 1-011 1-B Moss Hill 866.87500 867.83750 868.21250 868.46250 868.66250c 1-018 1-12 Ames 771.91875c...