If yo are familiar with Medium and short wave radio use, this is somewhat similar. Operating at different frequencies.
Tatasky LNB is Ku band - operating/transmit frequency at satellite to dish to lnb is 10GHz. C band is 3.5 to 4.2GHz for same.
More for you -
In 83E satellite, there are very attractive number of channels. You will need 8ft dish for decently reliable reception. 3805 and 3925 TP are no guarantee - These have like 72 channels in these frequencies.
8ft C band dish + LNB may cost upto 8K [or more]... Assuming 250 rupees DTH recharge per month, Now if you stick to FTA channels only - Time for recovery of this investment is 2 and half year...