Magenta MultiView II DVI-Rx-1K Installation And User Manual - Chapter 6
Troubleshooting
MultiView™ II DVI-Rx-1K Installation and User Guide
14
Chapter 6
Troubleshooting
In most cases, nearly every issue with the
MultiView™ video system can be resolved by checking the twisted-
pair cable
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 t
o not perform as it’s designed. The following table lists the most
common installation errors and their solutions.
Table 4: Troubleshooting Problems and Solutions
Problem
Solution
No video signal at
the receiver
Check that the transmitter is a MultiView-II DVI-Tx type, with the proper option
configured (-A, -S, or
–SAP) to match the receiver.
Check that both units are powered and all necessary cables are firmly
connected.
Ensure receiver EQ and SKEW adjustments are set correctly. Use the Auto-
adjust mode (push up + down buttons simultaneously). If a manual adjustment
is necessary, change EQ settings slowly to avoid losing the picture completely.
During initial installation of a MVII-DVI-Rx-1K receiver, it is best to start by
using Auto-Adjust mode. Once you have a video i
mage, it’s much easier to
fine-tune the EQ setting to get the best possible image on your display.
Make sure the twisted-pair cable is terminated correctly per the TIA/EIA 568B
wiring specification.
Check that the display device is powered on and functioning.
Check to ensure your chosen display is compatible with the format of the input
signal at the transmitter.
Poor video quality at
receiver
Ensure receiver EQ and SKEW adjustments are set correctly. Change EQ
settings slowly while making manual adjustments.
Check all cable connections.
There may be a video-skew delay issue
– your cable may have more than
65nSec of skew at its current length. If possible, use a shorter cable (or cut off
some
excess “service-loop”).
Check the twisted-pair pinout and also the connectors on the transmitter and
receiver for any bent pins or foreign objects wedged between contact pins.
Poor audio quality
The audio output at the receiver is line-level only. An amplifier, or powered
speakers, are required. Make sure amplifier or speaker power is ON.
Check input source levels from the source device. Ensure the audio source
level does not exceed the audio-input ratings for the transmitter (DVI-Tx).
Clipping or distortion can result.
Audio is summed left and right for “A” versions. If using a single channel, both
audio inputs must be connected at the transmitter end to obtain proper audio
gain through the link (approximately 1:1, input to output).
Serial
communication
doesn’t work
correctly
Are the serial devices connected properly? Are the serial parameters correct
for source/destination devices?
Are the serial cables terminated correctly? Is a null-modem cable required at
the TX or RX end?
When using serial-capable receivers with video switches, distribution amps, or
multi-output transmitters, the serial data is sent transmit-only. Please take this
into account when trying to control displays or other devices. For assistance,
contact Technical Support.
SAP units have a factory default baud rate of 9600 bps and use 3 wire (TX,
RX, GND) signals only. If necessary, use SAP-II serial commands to change
the baud rate to match your connected device.