... QPSK digital TV modulator adopts various processing method, such as random energy spread processing, RS coding, convolution interweave, contracting convolution ... range 250-750MHz, 450-1000MHz, and 950-2150MHz for random option;Build-in DDS frequency synthesizer, support L band uplink ... , 2/3, 3/4, 5/6, 7/8 for random optionExt 10MHz source input range≥10dBmOutside Band noise restrain≥ 50dBOutput ...