If you are using C-Band Dish antenna for asiasat 7 satellite then you can tune your FTA STB again to get two new hindi channels.
Big Magic and Big Magic Ganga free-to-air from Asia sat 7 satellite. In same transponder Big Thrill channel is already temp. fta.
You can tune given below frequency for Asiasat7 satellite to get all these 3 TV channels.
Technical downlink details for Big Magic HD, Big Magic Gaurav and Big Magic Punjab.
Satellite: AsiaSat 7
Beam / Band: C-Band
Symbol Rate: 11840
Encryption: Viaccess 4.0 / Temp. FTA Now
Big Magic Thrill also temp. freetoair from Asiasat7 satellite