Magenta MULTIVIEW XR2000 - Manual (Page 13)

.
13 11
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.