Scientific-Atlanta V9521791 RF QAM Modulator ASI

The Scientific-Atlanta V9521791 Galaxy Quantum RF QAM Modulator ASI is a modular QAM modulator card designed for the Galaxy headend ecosystem. It accepts an ASI input and provides a radio-frequency (RF) output to enable standard-compliant digital video distribution over coax networks. As part of the Galaxy Quantum family, the module fits in a Galaxy Modular Rack and benefits from hot-swappable installation, redundant power, and flexible slot assignment for scalable deployments. Quantum modules are built to modulate a sequential ASI data stream into RF, with available versions aligned to DVB (ITU-A), OpenCable (ITU-B), and ITU-C standards to match regional requirements. This single-card solution can be paired with other Galaxy modules to generate multiple QAM channels from multiple ASI streams, making it suitable for headend applications such as digital video distribution, on-demand services, and channel provisioning workflows. The V9521791 designation identifies this exact QAM modulator card within Scientific-Atlanta’s Galaxy Quantum lineup.