The Evertz 7750SRG-HD is a modular, high-precision sync generator card designed for installation within the 7700-series backplane chassis, providing stable and accurate reference signals for high-definition television facilities. Its primary function is to generate a tri-level sync pulse signal conforming to the SMPTE 274M and 296M standards, which is the universal timing reference for HD video equipment such as cameras, switchers, routers, and production gear. Tri-level sync, as opposed to the bi-level sync used in standard definition, is essential for synchronizing HD equipment as it provides a clearer timing point for both positive and negative transitions, ensuring precise frame alignment and stable pictures in multi-source environments.

The card is engineered for broadcast-critical reliability and flexibility. It can generate multiple independent outputs of tri-level sync at various HD formats (e.g., 1080i/59.94, 1080i/50, 720p/59.94, 720p/50) and often includes auxiliary reference outputs such as black burst (for SD equipment compatibility) and analog audio tone (for system alignment). A key feature is its ability to be genlocked to an external, higher-stability master reference source, such as a GPS-disciplined oscillator, ensuring the entire facility is synchronized to a common, accurate clock. When operating as the master, it provides a very stable output with low jitter, derived from its high-quality internal crystal oscillator.

As part of the modular 7700 system, the 7750SRG-HD is managed and monitored through the chassis's centralized control software. Its status, including output format, lock state, and any fault conditions, can be viewed remotely via a web interface or SNMP. The card benefits from the frame's redundant power and hot-swappability. By providing a robust, configurable, and centrally managed sync source in a high-density modular format, the Evertz 7750SRG-HD is an essential component for any HD broadcast facility, ensuring all video equipment operates in perfect synchrony to prevent rolling, tearing, or glitches during production and switching.