User manual

6
Vertical Locking
Depending on the input frame rate and the capabilities of the monitor in use, the HDP4
will provide a vertically locked signal to the monitor. Because most DVI monitors have
their own internal scaling, the internal scaler of the monitor may or may not lock vertically
to the HDP4 output. The recommended monitor list shown below lists only monitors
which have been tested for proper vertical lock. The HDP4 works with many LCD and
Plasma monitors not shown on the recommended monitor list—however, these monitors
may have one of two types of issues associated with not being vertically locked:
Frame add/drop: The monitor occasionally adds or drops a frame of video which
appears as discontinuous motion. For example, a moving object may appear to
briefly pause or jump ahead.
Motion tearing: The monitor displays video from 2 different fields or frames on
screen. This appears as a horizontal discontinuity in the video during motion.
For example, a moving object may appear to be split horizontally with the upper
part ahead or behind the lower part.
Block Diagram
HDP4 Converter, Simplified Block Diagram
DVI-D Output
SDI/HD-SDI
Input
SDI/HD-SDI
Output
SDI/HD-SDI
Output
Audio
Disembedder
Audio
D/A
Video Scaler
and
Framebuffer
SDI Receiver
SDI Transmitter
DVI
Transmitter
2-Channel
Analog Audio
Output
2-Channel
Analog Audio
Output
2-Channel
Analog Audio
Output
2-Channel
Analog Audio
Output
DVI-D Output
DVI-D Output
DVI-D Output
Reclock and Buffer