Semtech’s GS12070 is a highly configurable UHD-SDI gearbox with four inputs and four outputs which supports conversions between multi-link, dual-link, and single-link UHD-SDI interfaces. This gearbox performs multiplexing and de-multiplexing necessary to facilitate the conversions. A bypass mode is also available where the inputs can be routed directly to the outputs. The device supports 12 Gb/s, 6 Gb/s, 3 Gb/s, and 1.5 Gb/s data rates in the conversion modes and additionally supports 270 Mb/s in bypass mode.

The GS12070 eases the system challenge of receiving multi-link SDI signals by automatically compensating for input channel skew. In modes that convert from 12 Gb/s to 6 Gb/s combinations, the GS12070 automatically compensates for up to 300 ns of serial input channel skew. In all other conversion modes, up to 800 ns of input channel skew is available. As link ordering is critical for multi-link interfaces. The GS12070 is able to automatically order the incoming serial streams for multiplexing SMPTE compliant UHD-SDI interfaces. The link order can also be configured manually to compensate for cases where the cable order has been connected incorrectly.

In configuration modes where there are unused outputs available, the GS12070 can be programmed to duplicate existing outputs. In addition, inputs can be assigned to unused outputs for monitoring purposes.