Altinex MX2406RM manual Application Diagram, Analog Output, Power Supply, Bi-Directional Switching

SWITCHERS

beeping sound. If the unit is turned off and turned back on, the LED of the selected channel should light.

4.7 ANALOG OUTPUT

The analog output of the MX2406RM can be used for controlling several switchers simultaneously. The analog amplifier drives analog output pin 9 on a 9-pin “D” connector. The output can swing from 0 V to approximately 5.0 V. The output impedance of this pin is 100 Ohms and it can sink or source up to 5 mA of current. By using this output, several switchers can operate in gang mode. To do this, the analog output of the master switcher (pin 9) is connected to the analog input of the slave switchers (pin 9). Now, every time a channel is selected on the master switcher, the output voltage of the analog output will be set to switch all other switchers into the same channel. The simplicity of this approach is that only 2 wires (one to pin 9 and one to ground) are required to connect and control all of the switchers. The selection of channels can also be accomplished by RS-232 on the master switcher with all slave switchers connected through the analog control pin. A maximum of 4 switchers can be connected in this configuration.

APPLICATION DIAGRAM 5

4.8 POWER SUPPLY

The MX2406RM Switcher has 5 V power supply available on pin 8 of the 9-pin “D” connector. This voltage can be used to drive external circuits or as a pull up voltage for open collector type outputs. The total current on this pin should not exceed 150 mA of continuous operation or 500 mA for 5 minutes.

4.9 BI-DIRECTIONAL SWITCHING

The MX2406RM Switchers use very high bandwidth relays to provide you with a 400 MHz bandwidth. Each input, when not selected, is terminated to a 75-Ohms resistor. This is done to make sure that video lines are always terminated whether a channel is selected or not.

In addition to forward connection, the MX2406RM can be hooked up in a reverse direction. In this configuration one video source is selectively sent to each of the video monitors. This capability is referred to as bi-directional switching. In this configuration only one display device can be operational at any given time.

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