The OC-1N is a high-quality optical isolator for sync or
video signals, and it offers complete isolation between units
to prevent ground loops, video hum. It also eliminates DC
offsets that can cause picture quality loss. It has a
bandwidth of 20MHz. It features Opto Isolator Circuitry. You
can rackmount two (2) devices side-by-side in a 1U rack space
together with the optional RK-1 rack adapter.