C DX 5624 Reference Manual. Rev 2.0
SDTV Inputs
When a SDTV input is detected the module functions as a D/A con distribution
amplifier providing analog and digital outputs of the connected SDTV input signal.
Aspect Ratios
The module supports three aspect ratio conversion modes which can be user selected
using the local controls or preset with the optional control system.
Letterbox
This takes the 16:9 aspect ratio of the input HD signal and fits it into the 4:3 SD aspect
ratio screen with black bars at the top and bottom of the image.
Center Cut
This mode cuts the center portion of the 16:9 input signal and fills the 4:3 SD aspect ratio
screen.
Stretch to Fill
This mode takes the 16:9 input signal and distorts (vertically stretches) the image to fit
the available 4:3 SD aspect ratio space.
Page 7 of 29
