This is NarrowBand demodulator IP is silicon proven and extratced from production chipsets, it performs demodulation according to DVB-S, legacy DirectTV, DVB-S2 and DVB-S2X specifications. The input signal from the tuner is A-to-D converted on 10 bits. The DC offset, amplitude mismatch and quadrature error are corrected and the AGC signal level to the tuner is calculated. The carrier frequency offset is corrected. Then the signal is sub sampled and Nyquist root filtered. The signal amplitude is controlled through the second stage (AGC2) block. The pilots, when present, are used to help phase lock to the symbol stream. The signal is equalized, descrambled, and passed to the FEC. An internal state machine controls the automatic acquisition of a channel with various entry points, including warm start (known symbol frequency, small carrier offset), cold start (known symbol frequency and large carrier frequency offset), and blind search (all parameters unknown).