Extron electronic IN1404XT Optimizing the Video

in common”. Seamless switching only occurs between the passive channel 4 input

and the channel in common input.

Switching between input 4 and a non-channel in common input occurs during the

vertical interval of input 4. There is a slight delay without blanking while the new

input syncs to input 4 and becomes the new channel in common input.

When you switch between two scaled inputs without going through input 4, the

switch is not seamless. A brief blanking interval is seen on the output.

If the input 4 signal is turned off, the scaler switches over to an internal crystal

reference and operates in free-run mode. When seamless switching is not

available, the scaler blanks the screen when the scaler switches among inputs. The

sync signal remains present on the output while the scaler begins processing the

new video signal. The blanking during this interval ensures that a noise-filled

scramble is not shown on the output during the transition. When the input 4

video signal is restored and a switch to input 4 is made, seamless switching mode

reactivates.

Several menu functions or combinations of menu functions are coded as shortcuts

into the power up process. These shortcuts can be particularly useful is the

monitor does not display an image or the image is scrambled. Press and hold the

following buttons while powering up the scaler to perform the following functions:

Input 1 — Factory reset

Input 2 — Sets the output sync to RGBHV- - (negative sync)

Input 3 — Sets the output sync to RGBHV+ + (positive sync)

Input 4 — Sets the output sync to RGBS A (with serration pulses)

Blank — Sets the output sync to RGsB A (with serration pulses)

Freeze Frame — Enables the front panel

Mute — Turns autoswitch mode off

Menu — Sets the output resolution at 640 x 480 and refresh rate at 60 Hz

The arrow buttons below, , , , and , are the arrow buttons associated

with he menu system, not the volume and buttons.

— Sets the output resolution at 800 x 600 and refresh rate at 60 Hz

— Sets the output resolution at 1024 x 768 and refresh rate at 60 Hz

— Sets the output resolution at 1152 x 864 and refresh rate at 60 Hz

— Sets the output resolution at 1280 x 1024 and refresh rate at 60 Hz

Enter — Factory reset (identical to the Input 1 shortcut, above)

Optimizing the Video

To get the best results when using a DVD as a video source, Extron recommends

that the DVD player itself be set up to output an aspect ratio of 16:9 and not 4:3.

Because all DVDs are mastered as 16:9, having them set up for anything else causes

the player to internally scale and compress the signal. The DVD player’s scaling

and compression defeats the advantage of having 3-2 pulldown detection in the

IN1404XT.

All sizing adjustments to correct aspect ratio should be done using the IN1404XT.