Radio... something wrong TD and PTY?

Hi, i disconnected the battery terminal in front of the car. When i turned on the radio, everything was normal, i had all my settings and stations available, but then i noticed that where there used to be a PTY, is replaced by TD? What is TD and how do i get the PTY back on. I tried resetting the radio, by holding down the music note, i see that PTY is off, so then i change that setting, but the only other one is PTY AUTO. I see TD at 0, and somehow when i go up to like TD 1, the whole sound gets louder. I then go to the RESET?, and i press ok, but it just brings me back to the normal interface with the radio station on. What went wrong and how do i go back to normal settings?

Thanks,
Edwin