Extron electronic IN1404XT manual Input video type, Input video aspect ratio, Output resolution

Programmer’s Guide, cont’d

Command/Response Table for RS-232 Commands (Cont’d)

Command	ASCII Command	Response	Additional description
	(host to scaler)	(scaler to host)
Blue screen and video blank (continued)
Toggle video blank	[BLANK]	[OK]	Change the state of video blank
			(off to on or on to off).
	The blue screen has priority over the blank screen feature. If you turn the blue
	screen on while the blank screen feature is turned on, the blue screen appears.
	If you turn the blue screen off, while the blank screen feature is turned on, the
	blank screen appears.
View blank/blue screen	[BLANK?]	[ X2 ]	View the status of the blank
			screen/blue screen setting.
	If the blue screen feature is on, the scaler returns [3] . If the blue screen
	feature is off, the scaler returns either [1]		or [0] .
Input video type
Set selected input’s video type	[FMT X3 ]	[OK]	Specify the video type for the
			selected input.
Example:	[FMT4]	[OK]	Specify the selected input type as
			RGBHV.

1. Inputs 1 and 2 can be set to S-video and composite video only.

2.Only input 4 can be set to RGBHVS passive or RGsB passive.

View selected input’s video type [FMT?] [ X3 ] Selected input video type is

X4 .

Input video aspect ratio

Set selected input’s aspect ratio	[ASP X4 ]	[OK]	Specify the aspect ratio for the
			selected input.
Example:	[ASP2]	[OK]	Specify the selected input aspect
			ratio as widescreen (1.78).

View selected input’s aspect ratio [ASP?] [ X4 ] Selected input aspect ratio is

X4 .

Output resolution

Set output resolution	[SCS X5 ]	[OK]
Example:	[SCS3]	[OK]	Set output to 1024x768.
View output resolution	[SCS?]	[ X5 ]

Output refresh rate

Set output refresh rate	[REF X6 ]	[OK]
Example:	[REF1]	[OK]	Set refresh rate to 72 Hz.
View output refresh rate	[REF?]	[ X6 ]

Output sync

If you set the scaler to output RGsB video, you may encounter image problems on the display connected to the TP output.

The VTR001 CM that receives the TP output can receive RGsB signals from the scaler. However, the red, green, and blue video signals’ black levels are not clamped to a 0V reference, as for RGBHV or RGBS. For most displays, this is not a problem. On some displays (such as some LCD displays) however, the black levels of the red, green, and blue signals may change as the average picture level changes, resulting in an unacceptable image.

Set output sync format	[SYNC X7 ]	[OK]	Set output sync format to X7 .
View sync format	[SYNC?]	[ X7 ]
Example:	[SYNC?]	[3]	Sync format is set to RGBS with
			no serration pulses.

4-6 IN1404XT Video Scaler and Switcher • Programmer’s Guide