Thanks a lot for your help, but I'm still confused... I'll tell you how I hooked up mine...
-First I got an old (1978) tv and plugged it in as usual, and turned it to channel 3.
-Then I attached the little tong things from the RF switch to the screws on the tv. And I set the switch to "game"
-Then I plugged the power from the Atari into the wall.
-I also unplugged the antenna from the tv.
-I put a cartridge in the game slot and hooked up a joystick.
-Then I turned on the Atari and nothing changes on the screen and the atari doesnt make a noise or do anything at all!
And also could you expain that cord thing a little more?