8
MAGENTA MULTIVIEW™ SERIES
4. Troubleshooting
4.1 Common Problems
In most cases, nearly every issue with the MultiView™ Series can be resolved by
checking the CAT5 termination and making sure that it’s pinned to the
568B wiring specification. However, there may be other problems that cause the system
to not perform as it’s designed. Below are solutions to the most common installation
errors.
Problem:
No video signal at the transmitter local port or at the receiver.
Solution: • Check that both units are powered.
• Ensure Cable Length Compensation Switches are set
correctly .
• Make sure the CAT5 cable is terminated correctly per the
568B wiring specification.
• Is the display device powered on and functioning?
Problem:
Poor video quality.
Solution: • Have all receiver adjustments been finished.
• Check all cable connections.
• Ensure Cable Length Compensation Switches are set
correctly.
• The video signal’s refresh rate may be set too high for the display.
Reset to a lower refresh rate in your monitor-configuration menu.
Problem:
Poor audio quality.
Solution: • Powered speakers are required. Make sure speaker power is
ON.
• Check input source levels from the source device. Make sure
the audio source is not overdriven or underdriven.
• Low Level Audio may require the 100 Ώ termination disabled. Turn
SW1 off to disable termination.
Problem:
“Green shift” or “green washout” on multimedia signals.
Solution: The standard video 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 and inexpensive VGA DA’s, 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™ Series UTx Universal transmitter
has been designed with full DC restoration capability and can be
used prior to the T4/T5 VGA input to solve the issue.
.
5 9
APPENDIX A: Cable Pinouts
Appendix A. Cabling Pinouts
Table A-1. HD15 video connector.
Pin RGBHV
(VGA)
RGBS RGsB Com-
posite
SVHS
(Y/C)
YUV Composite
Video
& Stereo
Audio
1 Red + Red + Red + C+ V+ Audio Left
2 Green+ Green+ Green+ C+ Y+ Y+ C+
3 Blue+ Blue+ Blue+ U+ Audio Left
4 — — —
5 Gnd Gnd Gnd
6 Red- Red- Red- C- V- Shield
7 Green- Green- Green- C- Y- Y- C-
8 Blue- Blue- Blue- U- Shield
9 — — —
10 Gnd Gnd —
11 Gnd Gnd —
12 — — —
13 H Sync C Sync —
14 V Sync — —
15 Gnd Gnd —
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