Command/Response Table for RS-232 Commands
Command | ASCII Command | Response | Additional description |
| (host to scaler) | (scaler to host) |
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Input selection |
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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 |
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| highest numbered input with an |
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| active input. If no inputs are |
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| active, input 1 is selected. |
Manual input selection is not available, neither on the front panel nor via
Autoswitch mode off | [AS0] |
| [OK] | Autoswitch mode off. | |
View autoswitch mode | [AS?] |
| [ X2 ] | View autoswitch mode status. | |
Seamless switch mode |
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| 1. | Input 4 must be configured as passive. Turning seamless switch mode on | ||
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| 2. | automatically configures input 4 as passive if necessary. | ||
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| Turning seamless switch mode off does not reconfigure input 4. | |||
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| 3. | When seamless switching is on; and you switch to input 1, 2, or 3; that | ||
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| input is synced to the input 4 reference. The synced input 1, 2, or 3 is | ||
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| termed the “channel in common”. Seamless switching only occurs | ||
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| between the passive channel 4 input and the channel in common input. | ||
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| Switching between input 4 and a | ||
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| during the vertical interval of input 4. There is a slight delay without | ||
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| blanking while the new input syncs to input 4 and becomes the new | ||
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| channel in common input. |
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| When you switch between two scaled inputs without going through input | ||
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| 4, the switch is not seamless. A brief blanking interval is seen on the | ||
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| output. |
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Seamless mode on | [SM1] |
| [OK] | Turn seamless mode on (and | |
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| configure input 4 as passive, if |
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| necessary). |
Seamless mode off | [SM0] |
| [OK] | Turn seamless mode off. | |
View seamless mode | [SM?] |
| [ X2 ] | View seamless mode status. | |
Blue screen and video blank |
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Blue screen on | [BLANK3] | [OK] | Set the video output to blue. | ||
Blue screen off | [BLANK2] | [OK] | Set the video output to either the | ||
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| selected input 1 through 4 or the |
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| 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 | ||
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| selected input 1 through 4 or the |
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| blue screen (if enabled). |
IN1404XT Video Scaler and Switcher • Programmer’s Guide |