Please find "Add Channel" on your remote control by applying the following instructions.
Menu--> Settings-- > Channel Settings -- >Add Channel

Arrange the settings on the screen as follows.

Satelite : Turksat
Searching Mode: Decoded+Coded
Frequency : 12689 Mhz
Polarization : Horizontal
Symbol Rate : 02400
Fec Rate : 5/6
After you change the settings as mentioned above, chose "Search Type" option.