Sensoray 2246 - Manual (Page 27)

Windows will prompt the user to install new drivers. See Driver Installation
section.
2246 Standby Power
When an optional 5v volt power source is connected to the Standby Power
jumper, the 2246 will provide minimal video forwarding from analog video input to
analog video output.
Analog video consists of all Composite and S-video signals.
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