The Blonder Tongue AQM is designed to accept an MPEG- 2 ASI (Asynchronous Serial Interface) digital transport stream and modulate it into a QAM (Quadrature Amplitude Modulation) signal. The Blonder Tongue QAM modulator in the AQM achieves state of the- art performance with capabilities to improve bandwidth efficiency by supporting advanced QAM modes like 256, 512 & 1024 QAM.