Video Pass-Through Selector

The video pass-through selector is capable of selecting any of the 4 video signals applied on VID_IN1, ..., VID_IN4 and Cascade Video input ports. The selected video signal is then buffered and routed to the Cascade Video output port.

UxVideoPassThroughSelector

Video pass-through selector functional block diagram (xx = 4)

The video multiplexer has 2 stages of selectors. The first stage —V_Mux— selects one out of the 4 video inputs; the second stage —C_Mux— selects either the Cascade Video input, either the output of the first selector stage.

At power-on or reset, both stages revert to their default value: the V-Mux selects VID_IN01 and the C_Mux selects the Cascade Video Input.

Note that a selection of the Cascade Video input preserves the selection of V_Mux.

Note. The buffered Video Cascade allows all video input signals of multiple Picolo U4 H.264 PCI-104 to be multiplexed on a single Video output for connection to a single display monitor.

The video signals are switched asynchronously regardless of the video timing; consequently, a video monitor connected on the Cascade Video output may temporally unlock after a channel switching.

The video input signals are not significantly altered by the channel switching, allowing channel switching during image acquisition.

The VideoInput0, to VideoInput4. element from the Virtual File System API controls the first selector stage.The Cascade element from Virtual File System API controls the second selector stage.