CREATE TABLE "main_transmitters" (
  "region_served" text,
  "ch_1" text,
  "on_air_date" text,
  "analogue_power" text,
  "digital_power" text,
  "analogue_haat" text,
  "digital_haat" text,
  "transmitter_location" text
);

Question: What is the Ch1 in the region served by Central Tablelands?
SQL: SELECT "ch_1" FROM "main_transmitters" WHERE "region_served"='central tablelands';

Question: What transmitter location has digital power of 570kw?
SQL: SELECT "transmitter_location" FROM "main_transmitters" WHERE "digital_power"='570kw';