Troubleshooting

Installation and Operation, cont’d

3Min/Max LED (TP T 468 only) — This front panel LED blinks red momentarily whenever the minimum or maximum limits of the horizontal shift control ( 2 ) have been reached. Continually turning the horizontal shift control knob in the same direction after the limit has been reached will cause the LED to continually blink.

For details on the ID bit (TP T 15HD A and

TP T 15HD AV) or Monitor/No Monitor (TP T 468) and DDSP switches, see “Computer video and PC audio,” earlier in this chapter.

If the image does not appear

1.	Ensure that all devices are receiving power. The
	transmitter’s and receiver’s front panel Power LEDs
	indicate that they are receiving power.
2.	Ensure that the transmitter is receiving a video input.
3.	Ensure that the TP cable(s) are properly terminated in
	accordance with TIA/EIA T 568A standards and that the
	RJ-45 connections are securely made. If the Power LEDs
	on the transmitter and the receiver are lit green, a
	transmitter is properly connected to a receiver.
4.	For computer/RGB video, ensure that the receiver’s SOG
	and C Sync switches are in the correct positions for the
	video output.
5.	For computer video, ensure that the transmitter’s ID bit
	switches are on.
6.	For computer video on an LCD projector, ensure that the
	transmitter’s DDSP switch is on.

7.The transmission distance may be too far for remote power. Try connecting the local 15 VDC power supply to the transmitter.

8.The transmission distance may be too short. Ensure that the UTP cable is at least 50' (15.2 m) long.

9. If the Manual/Auto switch is in the manual position, ensure that the receiver’s level controls are not set too high. Too much level and peaking can cause display problems.

10. For computer video from a laptop or for ungrounded AC distribution systems, the transmitter may need to be grounded. See “Grounding the transmitter,” earlier in this chapter.

11. Call the Extron S3 Sales & Technical Support Hotline if necessary.

If the image is not displayed correctly

1.	For computer/RGB video, if the output image looks too
	green, ensure that the receiver’s SOG switch is off.
2.	For computer video, if the picture hangs off the edge of the
	screen, adjust the transmitter’s H Shift control.
		DDSP disables the horizontal shift control.

3.	Place the receiver’s Manual/Auto switch to manual and
	adjust the level and peaking controls for optimum quality.

4.The transmission distance may be too far for remote power. Try connecting the local 15VDC power supply to the transmitter.

5.	For computer video from a laptop or for ungrounded AC
	distribution systems, the transmitter may need to be
	grounded. See “Grounding the transmitter,” earlier in this
	chapter.
6.	If the image still does not display properly, call the Extron
	S3 Sales & Technical Support Hotline. (See the rear cover
	of this manual for the phone number for your region of the
	world.)

If the receiver’s Manual/Auto LED flashes

1.	The transmission distance may be too far for remote power.
	Connect the local 15VDC power supply to the transmitter.
2.	Check the RJ-45 connector for a loose connection.

2-30 Extron TP Transmitters • Installation and Operation

Extron TP Transmitters • Installation and Operation 2-31

TP T 468, TP T 15HD A, TP T 15HD AV, TP T BNC DA4 specifications

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