Extron Electronics TPS150 User Guide - Manual (Page 24)

Operation, cont’d
TPS150 Switching and Transmission System • Operation 3-4
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.