SDI/HD-SDI Matrix SwitchersExtron SDI/HD-SDI matrix switchers are designed to switch multiple serial digital video signals with embedded audio that comply with SMPTE and ITU standards for standard definition and high definition video, including 3G-SDI. They are ideal for AV presentation applications, as well as small video production and post-production systems, and are available in I/O sizes from 4x4 to 72x72. On this page: Modular & Expandable for SMPTE 292M/372M/424M HD-SDI Modular & Expandable for SMPTE 292M/372M/424M HD-SDI FOX I/O 88 HD-SDI 8x8 3G-SDI I/O Board for the FOX Matrix 3200 and FOX Matrix 7200 SMX Multi-Rate SDI Series 3G-SDI Matrix Switcher Boards FOX Matrix 3200 Modular Fiber Optic Matrix Switcher from 8x8 to 32x32 FOX Matrix 7200 Modular Fiber Optic Matrix Switcher from 8x8 to 72x72 SMX System MultiMatrix Digital and Analog Multi-Plane Modular Matrix Switcher