User guide

Troubleshooting
MultiView™ II AK600DP/AK1200DP Installation and User Guide 17
Chapter 5 Troubleshooting
In most cases, nearly every issue with the MultiView™ video system can be resolved by checking the Category
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 to not perform as it’s designed. The following table lists the most
common installation errors and their solutions.
Table 6: Troubleshooting Problems and Solutions
Problem
Solution
No video signal at
the receiver
 Check that both units are powered and all necessary cables are firmly connected.
 Ensure receiver EQ and SKEW adjustments are set correctly. Change EQ
settings slowly to allow the display to re-acquire a valid signal and display the
image.
 During initial installation of a MVII receiver, it is very helpful to pre-set the EQ to
an approximately correct value. For example, if the UTP cable is known to be
approximately 300ft long:
o If you have a MVII-AK600DP, set the EQ to about ½ the maximum
setting on the EQ-range LEDs, which is approximately 300ft. This
would result in your EQ being set almost right for a 300ft cable and
you should be able to get a video image.
o If you have a MVII-AK1200DP receiver, set the range to about ¼ of
the maximum setting on the EQ-range LEDs, which again would be
approximately 300ft.
o Once you have a video image, it’s much easier to fine-tune the EQ
setting to get the best possible image on your display.
 Make sure the Category 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.
Poor video quality at
receiver
 Ensure receiver EQ and SKEW adjustments are set correctly. Change EQ
settings slowly to allow the display to re-acquire a valid signal and display the
image.
 Check all cable connections.
 The video signal’s refresh rate may be set too high. Reset to a lower refresh rate
in your display-configuration menu (for example, under Windows on a PC).
 There may be a video-skew delay issue.
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 (ex: XRTx). 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 (1:1, input to output).
 If daisy chaining, audio termination must be removed in DP receivers
(AK600(1200)DP and XR2000DP). Only the last receiver requires termination.
This does not apply to SA or SAP units. SA units no longer require separate daisy
chain or end of line units as of April 2009. Refer to the appropriate receiver user
manual.