Table of Contents
Advertisement
7700 MultiFrame Manual
7714HDC High Quality Down Converter
6.3.9. Setting the Action to Take when Input Video Is Missing
Video
Loss of Video
Black
Blue
Pass
6.3.10. Setting up the Video Output Timing
The input stage of the 7714HDC Down Converter contains a frame buffer so that the output video can be
timed with respect to the reference applied to the GENLOCK input when the Reference Select menu item
is set to External. In the absence of a genlock signal, or when the Reference Select menu item is set to
Video the output video will be timed with respect to the incoming Video.
The V Phase Offset and H Phase Offset adjustments are REAL TIME
ADJUSTMENTS and will affect the output video timing immediately. These settings
should not be adjusted when the output video is in the broadcast chain.
6.3.10.1. Calculating the Delay through the Down Converter
The delay through 7714HDC Down Converter is dependent on the video input format, the Down Converter
processing mode and the V Phase Offset and H Phase Offset settings. There are separate settings of H
and V phase offset for each output video type.
To achieve the minimum delay use the control Force Minimum Delay. Otherwise the status screen will
report the current true delay of the system.
The delay is counted in the lines and pixels of the output standard and is
calculated from input field 0 start to output field 0 start.
6.3.11. Force minimum Delay
Video
Force minimum
Delay
7714HDC - 18
The user can set the output to go to black, go to blue or pass the input with
this control.
When set to Pass the output video will be incoherent when the video input is
missing.
This control sets the H Phase Offset and V Phase Offset menu settings
such that the card has the minimum possible input to output delay.
Note: The input video must be synchronous with the selected genlock for
this control to have any meaning.
Revision 1.1
Advertisement
Table of Contents
