[97.221] , [97.305]

On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital station?

  1. On any band segment where digital operation is permitted
  2. Anywhere in the non-phone segments of the 10-meter or shorter wavelength bands
  3. Only in the non-phone Extra Class segments of the bands
  4. Anywhere in the 6-meter or shorter wavelength bands, and in limited segments of some of the HF bands