Command/Response Table for RS-232 Commands

Command

ASCII Command

Response

Additional description

 

(host to scaler)

(scaler to host)

 

Input selection

 

 

 

 

 

 

 

Select a video and audio input

[CH X1 ]

[OK]

Select video and audio input X1 .

Example:

[CH3]

[OK]

Select video and audio input 3.

View input video selection

[CH?]

[ X1 ]

Video input X1 selected.

The CH? command code views the selected video input only. There is no corresponding view audio input command.

Select a video input

[CHV X1 ]

[OK]

Select video input

Select an audio input

[CHA X1 ]

[OK]

Select audio input

X1 .

X1 .

Autoswitch mode

Autoswitch mode on

[AS1]

[OK]

Scaler autoswitches to the

 

 

 

highest numbered input with an

 

 

 

active input. If no inputs are

 

 

 

active, input 1 is selected.

Manual input selection is not available, neither on the front panel nor via

RS-232 control.

Autoswitch mode off

[AS0]

 

[OK]

Autoswitch mode off.

View autoswitch mode

[AS?]

 

[ X2 ]

View autoswitch mode status.

Seamless switch mode

 

 

 

 

 

 

1.

Input 4 must be configured as passive. Turning seamless switch mode on

 

 

 

 

2.

automatically configures input 4 as passive if necessary.

 

 

Turning seamless switch mode off does not reconfigure input 4.

 

 

3.

When seamless switching is on; and you switch to input 1, 2, or 3; that

 

 

 

input is synced to the input 4 reference. The synced input 1, 2, or 3 is

 

 

 

termed the “channel 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-common in channel 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.

 

 

 

 

 

 

 

 

Seamless mode on

[SM1]

 

[OK]

Turn seamless mode on (and

 

 

 

 

 

configure input 4 as passive, if

 

 

 

 

 

necessary).

Seamless mode off

[SM0]

 

[OK]

Turn seamless mode off.

View seamless mode

[SM?]

 

[ X2 ]

View seamless mode status.

Blue screen and video blank

 

 

 

Blue screen on

[BLANK3]

[OK]

Set the video output to blue.

Blue screen off

[BLANK2]

[OK]

Set the video output to either the

 

 

 

 

 

selected input 1 through 4 or the

 

 

 

 

 

blank screen (if enabled).

Video blank on

[BLANK1]

[OK]

Set the video output to blank.

Video blank off

[BLANK0]

[OK]

Set the video output to either the

 

 

 

 

 

selected input 1 through 4 or the

 

 

 

 

 

blue screen (if enabled).

IN1404XT Video Scaler and Switcher • Programmer’s Guide

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Extron electronic IN1404XT manual Command Ascii Command Response Additional description, Input selection, Autoswitch mode