CREATE TABLE table_1601792_4 (television_station VARCHAR, transmitted VARCHAR, frequency VARCHAR)

What is the station that is transmitted at 20 kw and has a frequency of 48 uhf?
SELECT television_station FROM table_1601792_4 WHERE transmitted = "20 kW" AND frequency = "48 UHF"
SELECT "television_station" FROM "table_1601792_4" WHERE "20 kW" = "transmitted" AND "48 UHF" = "frequency"