The JED T440 projector controller (and optional T441 or T461 audio controller) offers a convenient system to control video and data projectors from a suitable point on a lectern, bench or wall near a speaker's location in a hall or theatre.
Alternatively, the controller and front assembly can be mounted on a black or white Clipsal 2000 base block, and can be wall mounted near the operator's position.
A 45 degree white or black metal case is also available (see below)
The T440 has an attractive white, or black, smooth escutcheon surrounding it, to give an overall size of 110mm by 70mm. This covers the screw holes and can be mounted into a lectern or desk at a convenient point for the speaker to control video and data projector operations. As an option, just the adhesive backed keyboard and electronics board can be supplied without a Clipsal plate, to allow installers to mount the system on their own panel to match the decor of media control desks or wall plates in boardrooms, etc.
The T440 is wired back to the LCD projector via an RS232 data cable, needing only three wires (TX, RX and Ground). (A connection for a fourth wire with 9 volts on it is available as a CTS or DTR line HIGH to the projector to enable RS232 transmission, as some projectors expect this input to be HIGH before allowing transmission.)
The control codes for different projectors are programmed into the T440 controller, and the projector family needed for a particular installation is selected on the rotary switches on the back. Keyboard type and options are selected on other switches on the back.
Keyboards
The normal keyboard background colour is off-white, or "beige", as the photos show. Other colours and key layouts can be produced if a quantity are needed.
The CodeBL-Metal is the latest option: this comes with a darker "liquid metal" surround ... the same matt metallic finish used by European auto companies for interior fittings. Looks great in boardrooms!
The T440 has a choice of keyboard labels ... many different layouts can be accomodated, with up to eight keys, and up to four LEDs (always in the positions shown.)
In some layouts, a separate On and Off key is provided, having green and a red LEDs as state indictors. During warmup the green On LED flashes. During cooldown, the red Off LED flashes. A channel LED comes on steady to indicate the channel to start with after warm-up. (This can be preselected by pressing other buttons).
Keyboard "Double-press" mode
Keyboards with a single computer key or a single video key are able to select alternate video or computer channels by setting the OPT4 switch on the back.
(The primary channels are selected when first switching from Computer to Video (or after startup), and a second press is needed to select the alternate channels.)
Audio mute function
Pressing both Volume keys together mutes the sound and picture on most projectors (some don't have support for this).
(Either yellow key, or the current channel key, restores the picture/sound).
The audio keys auto Increment/Decrement the audio level if a yellow key is held down. (Times are programmable.)
Keyboards with combined Channel function and Power On
In layouts which combine a channel button with the "On" function, the selected channel LED flashes during warmup. (The channel can still be changed during warmup.)
On Code B layout, a "portrait" or vertical format can be chosen.
Keyboard for TV control
The Code-E keyboard (above) is a control panel for LCD or Plasma TV, which adds a Channel Up/Down to the other functions.
Audio control
The control of audio level is usually done in the projector, and audio control signals are sent to the projector along with the video source and power control signals.
This assumes:
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The projector has enough, and appropriate, audio input connectors for the video & computer channels to be used;
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There is a line level audio output connector on the projector to drive the room amplifier and speakers; and
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The projector actually controls the audio level
of the output audio via RS232 (not just the projector's internal tiny speakers).
If all of these three are NOT true, you will need a T441 or T461 to control the audio.
If a T441 or a T461 audio controller is installed, it is controlled with a second serial port on the T440, and the T441/T461 selects and controls the audio levels in step with "source select" signals sent to the video projector.
