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MAGENTA MULTIVIEW™ SERIES

4. Troubleshooting

4.1. Common Problems

In most cases, nearly every issue with the MultiView™ CAT5 Video System can be resolved by
checking the CAT5 termination and making sure that it’s pinned to the TIA/EIA 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 EQ adjustment switches are is set correctly
              • Make sure the CAT5 cable is terminated correctly per the TIA/EIA 568B
                wiring specification.
                  • Is the display device powered on and functioning?
              • Check to ensure display settings (resolution, refresh rate, etc) are
                compatible with input signal.

Problem:

Poor video quality:

Solution: •

Have all receiver adjustments been finished (see section 3.3).

                • Ensure EQ adjustment switches are is set correctly
              • Check all cable connections.
              •The video signal’s refresh rate may be set too high. Reset to a
                lower refresh rate in your monitor-configuration menu.

Problem:

Poor audio quality (MV 500A only):

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.
              • Audio is summed left and right for “A” versions. If using a single
                channel, both audio inputs must be connected at the transmitter
                end for full audio gain. Audio is line level.
              • Low Level Audio may require the 100

termination disabled. Turn

SW1 off to disable termination.

Problem:

Serial communication doesn’t work correctly (MV500S only):

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.
              • When using RS-232 transmitters or receivers in daisy chains,
                Cat5 switches, Cat5 distribution amps, or Multi-output
                 transmitters, the serial signal is a unidirectionally broadcast
                mode only. In this mode, all other MultiView™ CAT5 Video
                System devices must be the simplex serial type.
              • MV500S use 3 wire (TX,RX,GND) signals only via the 1/8”
                connector (see Appendix A for pinout).

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. For five-
              component (RGB/H&V) AC coupled video, the MultiView™ Series
              UTx or XRTx Universal transmitter has been designed with full DC
              restoration capability. Please refer to the transmitter user manual.