Doesn't look like it has a digital tuner. ATSC is the standard in TV broadcasting in North America and Korea.
Thanks Pyree for your response. I was having about doubts if my TV model supports ATSC since I had purchased the TV when I was in Dubai in 2004. Since this model has HD input signal receivable, I thought maybe it has its own digital tuner (ATSC). So, this TV was sold outside North America market, there is hardly any chance that it would have ATSC.