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Command/response table for rs-232 commands – Extron electronic IN1404XT User Manual

Page 61

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4-5

IN1404XT Video Scaler and Switcher • Programmer’s Guide

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

X1

.

Select

an audio input

[CHA

X1

]

[OK]

Select audio input

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
automatically configures input 4 as passive if necessary.

2

.

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).