Revealing Hidden Secret Service Menu in Dish TV DTH Set Top Box - There. If am not pay free channel also i can't able to see. any way to watch free. IN MY DISH TV HD SET TOP BOX ALL DD CHANNELS ARE SHOWWING NO SIGNAL . Hack 1 : DD currently broadcasts 21 of its own TV channels direct to. DTH FREE TO AIR CHANNELS (FTA) IN AIRTEL DTH (AIRTEL DIGITAL TV) for example you can enter DD Direct+ (aka Free Dish) TP details to watch its FTA channels.