Hi Tim,
If you go to menu 96 STEP FREQUENCY, You can manually set it to these options steps: 100, 50, 25, 20, 15, 12.5, 10, 6.25, 5 KHz or Auto.
Yours likely set to auto.
none of these will let you type 002185KHz unfortunately.
Hopefully someone will post why that is.
thanks for posting...