Video low-pass and SAW filtering to ensure quality performance. Video delay predistortion. The Drake VM2550A modulator is a high-quality, vestigial sideband unit with synthesized visual and aural carriers. The frequency-agile VM2550A features 82 channel frequency coverage up to 550 MHz, allowing for front panel selection of standard CATV channel 2 to 78 and 95 to 99. Both audio and video AGC can be selected to maintain nearly constant modulation levels.
Audio input can be either unbalanced or balanced.
These features, combined with a carefully designed output stage, provide reliable operation in a densely crowded or cable environment. Sync pulse gated. Meets group delay pre distortion requirement for NTSC color transmission per FCC part 73.