Burst Electronics DSR4x1 - Manual (Page 3)

channel. If an analog video input (composite sync or
tri-level sync) is present on the Ref Input port, then
clean switching between video sources can be
accomplished when your digital sources are
synchronous with the analog video.
Operation
Simply depress one of the front panel switches to
select a video input. The button you have pressed will
illuminate an embedded LED to indicate the channel
is selected. If an analog video signal (black burst or tri-
level sync) is connected to the Ref Input port, the
digital video signal will switch during the vertical
interval cycle of the reference video. This change
takes place at approximately line 10 of the analog
video signal. It is strongly suggested that your digital
video sources also receive the same analog reference
video signal. As with analog vertical interval video
switchers, your digital video sources should be
genlocked.
On the rear panel of the DSR8x1, the Ref Input port
can be configured as a secondary video output. To
DSR8x1 & DSR4x1 HD/SD SDI Video Switcher 3