Magenta XR2000 setup guide 113

CHAPTER 4: Troubleshooting.

Problem: Poor audio quality (continued) :

Solution:

•If Daisy Chaining, audio termination must be removed in DP units. Only the last receiver requires termination. For SA units a special un-terminated version must be used between transmitters and the last receiver with a standard End-Of-Line unit installed at the end. SA units cannot be terminated/ unterminated in the field. This does not apply to SAP units.

Problem: Serial communication doesn’t work correctly.

Solution: • Are the serial devices connected properly? Are the serial parameters correct for source/destination devices?

•Are the serial cables terminated correctly? If a null-modem cable is used, it must be placed at the receiver end.

•For SA units a special unterminated version must be used between transmitters and the last receiver with a standard End- Of-Line unit installed at the end. SA units cannot be terminated/ unterminated in the field. This does not apply to SAP units.

•SA/SAP units have a fixed baud rate of 9600 bps and use 3 wire (TX,RX,GND) signals only.

Problem:	“Green shift” or “green washout” on multimedia signals.
Solution:	The standard video/serial model is designed to function with DC
	coupled signals in which the black level is referenced to 0 volts.
	Nearly all VGA cards function this way.
	Some media servers, however, provide AC coupled signals and
	can cause a green color shift in the video. This is a result of the
	sync clamping on the red and blue channels of the video/serial
	model.
	For five-component (RGB/H&V) AC coupled video, the
	MultiView CAT5 UTx Universal transmitter has been designed
	with full DC restoration capability. This problem is easily solved
	via a simple switch setting in the UTx Transmitter. Please refer to
	the UTx Transmitter user manual.

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