Description

The 5455 module is a fail-safe, bypass protection switch for critical standard definition serial digital paths for broadcast or satellite applications. When a fault is detected in the primary input, and the secondary input is verified as good, the switch will activate causing the secondary input to be switched to the module’s output. The 5455 includes a passive, fail-safe path that ensures there is an output even in the event of a total power failure.

The health of the video signal is determined by monitoring crucial parameters in order of increasing complexity: Timing Reference Signal (TRS), or a persistent loss of digital sync is tested first. Black, Embedded Audio and Freeze are also evaluated. Each test can be configured by the user. For example, the sophisticated Black Detector includes configurable parameters for black level threshold, pixel count, and duration time.

The Freeze detection system can be set to detect a clean or noisy source. Freeze Time sets the number of seconds for the 5455 to switch to the secondary input after a video freeze condition is detected in the primary input.

The switch can operate in two modes; automatic or nonresetting. In fully automatic mode, the 5455 will automatically switch back to the primary signal once it’s been restored. In the nonresetting mode, the secondary input remains routed to the output, even after the primary input has recovered.

Controls are easily accessed through an Avenue Touch Screen, Avenue PC, GPIs, or front edge module controls. GPI inputs allow faults detected in upstream equipment to contribute to the switching logic.