Marshall Electronics V-SG4K-HDI | 4K HDMI Portable Signal Generator Generates 32 video test patterns in formats from SD to HD to 4K. Includes computer formats / timings Generates audio tones from two to 8 channels, 16 to 24-bits, 32-192KHz sample rates Audio jack allows insertion of audio from external source (two channels) Detailed adjustment of timing parameters (perfect for designers / QC test) Check HDCP compliance