12
| DVI-Ramp
2
/ DVI-Ramp
2
DSK
7
VIDEO
This LED is only found on the DSK model.
GREEN when unit is genlocked on SD/HD SDI input
RED when unit is programmed to genlock on SD/HD SDI input but none is present. Unit is
then free-running
ORANGE – FLASHING when unit is programmed to genlock on SD/HD SDI input but
wrong format is detected. Unit is free-running.
GREEN-FLASHING when unit is programmed to be free-running but a valid SD/HD SDI
signal is detected
ORANGE unit is programmed to be free-running and an unknown SD/HD SDI signal is
present
OFF when unit is programmed to be free-running and no SD/HD SDI signal is detected
Controls
Only one control is provided at the front panel:
5
RESET button
The RESET button is a dual-function control, and operates as follows:
•
Quick push and release – resets the USB communication port.
•
Push and hold for 5 seconds before releasing – copy the display settings to the
DVI-Ramp
2
input. This ensures that the input of the DVI-Ramp
2
will mimic the
display that is connected to its DVI output.
o
Settings on "DVI-D OUT A" are copied to "DVI-D IN A"
o
Settings on "DVI-D OUT B" are copied to "DVI-D IN B"
Use a bent paper clip or equivalent thin wire to activate the RESET button through
the hole in the front panel.
3.3 Synchronizing the DVI-Ramp
2
and the graphics card
The DVI-Ramp
2
processes the output of the computer graphics card and outputs a video signal. The timing
relationship between the graphics card output and the video system is important in determining the success
of the transfer.
The DVI Ramp
2
supports 2 different approaches to this situation:
3.3.1 Frame sync (graphics card without reference)
The graphics card is not synchronized with the video system. The DVI-Ramp
2
operates as a frame
synchronizer, meaning that its input from the graphics card is buffered, and frames are repeated or dropped
if the buffer underflows or overflows.
The frame-sync will drop frames when the DVI rate is larger than the SDI rate. Conversely, it will repeat
frames when the DVI rate is smaller than the SDI rate.
