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OPERATION 7 7.1 OPERATION FROM THE FRONT PANEL The front panel of the MX2226AT provides access to essentially all of the switcher’s capabilities. It has three sections: input select, switcher functions, and output control. 7.1.2 INPUT SELECT SECTION SELECTION OF INPUT: When the buttons INPUT1 through INPUT6 are pressed, the corresponding INPUT will be selected. The LED on top of the bottom front panel will TURN ON simultaneously to indicate which input has been selected. When connected as a 1-in 6-out switcher, the outputs are selected through the INPUT SELECT section. SET DEFAULT POWER UP INPUT: This function allows a user to define which input will be selected at power up. To define the default power on the input channel, while turning ON the unit, press the desired channel switch and hold it for approximately 2 seconds until you hear a short beep. Turn the unit OFF and then turn it back on again. The LED of the selected input should be ON. For factory default the input is set to INPUT1. 7.1.2 SWITCHER FUNCTIONS SECTION RESET: This function allows a user to reset the switcher without unplugging the unit. Press the RESET button and hold it for approximately 2 seconds. When you hear a beeping sound, release the button. All LEDs on the front panel will flash simultaneously. The current connection of input to output will be lost and power up input will be loaded. The user-set defaults for SOUND and DEFAULT CHANNEL will not be changed by the RESET function. ALL OFF: This function allows a user to turn OFF the output of the MX22226AT. It is very useful when the MX2226AT Switcher is used in an application, where the display must be blanked periodically. Press this button to switch to a “no signal” condition. To resume Input Select switching, simply press the desired INPUT or the STEP function. SOUND: This function allows a user to have audible feedback when the buttons are pressed. The factory default is set to have audible feedback ON through to a beep. In some situations however, sound may be undesirable. To disable the beeping sound, press this button and hold it for approximately 2 seconds until a beep is heard. After the sound is disabled, to re-enable the sound, repeat the same procedure. 6 SWITCHERS STEP: This feature allows cycling through the inputs one at a time. It is used to select the next input from an ALL OFF condition. If this button is pressed once it switches to the next input in an increasing order. For example, if INPUT 3 is currently selected, pressing STEP SELECT once will switch to INPUT 4. If pressed again INPUT 5 is selected. If INPUT 6 is already selected, and the STEP SELECT button is pressed once, none of the inputs will be selected. This condition is similar to the ALL ON function. By pressing once more from the ALL OFF stage, INPUT 1 will be selected. 7.1.3 OUTPUT CONTROL SECTION DELAY: This function enables Sync Delay Switching in RGBHV and RGBS signals. Sync Delay allows the ”glitch” that normally takes place when switching between high-resolution sources to take place off screen. When the Sync Delay feature is enabled, the video portion of the image (RGB signals) is disconnected before the sync portion (H&V SYNC or CSYNC). When connecting the input, the video portion of the signal (RGB) is restored shortly after the incoming sync portion of the signal is connected. This delay time is factory pre-set to 2.5 seconds. By pressing this button once, the SYNC DELAY feature is enabled and confirmed through the LED on top of the button. If it is pressed once more this feature is disabled and the LED turns off. VIDEO OFF: This feature allows a user to disable only the video (RGB channels) portion of the selected source. The sync portion (H&V, SYNC or CSYNC) of the selected source will continue to be sent to the display. This feature can be very helpful when the user does not want the display to go into a ”no display” or “no signal” mode (e.g. some data monitors will display a blue screen if no signal is present). To disable the video portion of the selected input, press the video off button once, the LED on the top button should light up. To enable the video portion, press the button again and the LED will be in an OFF position. This feature is designed to work only with RGBHV, RGBS and RGsB format signals. It is similar to the ALL OFF mode except that there is only sync signal sent to the output for display. 7.2 RS-232 CONTROL The MX2226AT uses a terminal block type connector for RS-232 communication. The terminal block uses solder-free, screw-down contacts, making it extremely easy to connect the switcher to a control system or to a computer in the field. RS-232 Terminal Block PIN DESCRIPTION RX RS-232 receive TX RS-232 transmit GND Ground LOOP Used to connect additional switchers in ”Loop” mode. Terminal Block Designation The terminal block is labeled with the proper contact designations: Transmit (TX), Receive (RX), and Ground (GND). Always remember that the Transmit pin from the cont...