Extron electronic IN1404XT - Manual (Page 62)

Programmer’s Guide, cont’d
IN1404XT Video Scaler and Switcher • Programmer’s Guide 4-6
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.