Extron electronic TPS150 Operation, cont’d, Operations, Power, Input selection, Projector power

Operation, cont’d

Operations

The following paragraphs detail the power-up process and then describe selecting an input, issuing the projector power up and down commands, and adjusting the input level and output volume.

Power

Apply power to the transmitter by connecting the power cord to an AC source and toggling the AC power switch to the on ( ) position. Apply power to the receiver by connecting the power cord to an AC source.

When AC power is applied, the transmitter and receiver perform a self-test that flashes all of the transmitter’s front panel LEDs on and off once. An error-free power up self-test sequence leaves the transmitter’s selected input LED, the Power LEDs, and the receiver’s High Frequency LED on.

The selected input, the audio input level and output volume, and the blank and mute on/off status are saved in non-volatile memory. When power is applied, the latest configuration is retrieved.

Input selection

Press the Input Select button on the transmitter for the desired input. When you select an input, the following occurs:

•The transmitter sends the video portion of the selected input to the receiver on the TP link. The receiver outputs the video on its appropriate Video Output connectors.

•If the operator has pre-programmed a serial command or data string for the selected input (such as a projector’s own input selection or video format command), the transmitter sends that serial string to the receiver on the TP link. The receiver then outputs the serial string on its RS-232 port. See chapter 4, “Serial Communications”, to specify the command to be sent.

•The transmitter outputs the audio portion of the selected input locally, on its own rear panel Output Audio port.

Projector power

The receiver does not receive a confirmation from the projector that it is on or off. Rather, after the TPT150’s power is applied, the first serial string the transmitter sends to the receiver (which passes it to the projector) is the string that was programmed as the projector power on command. From that point, every time you push the button, the transmitter alternates between sending the power off command and the power on command. If the projector is powered on or off locally, the transmitter sends the wrong command the next time the Projector Power button is pressed.

The Projector Power control is typically used to remotely command the connected projector to power itself up or down. Command strings to be transmitted must be programmed in advance. The projector power timeout function (if enabled) automatically powers off the projector after a user-defined interval. See chapter 4, “Serial Communications”, to specify the commands to be sent and to set the timout function.

3-4 TPS150 Switching and Transmission System • Operation