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DVI DL 201 Tx/Rx • Conguration and Operation
3-7
Insure all three twisted pair cables are rmly seated in the
correct receptacles.
No output signal or poor quality signal — Check the integrity
of the UTP or STP cables between the transmitter and the
receiver.
N
The transmitter and receiver pair works with unshielded
twisted pair (UTP) or shielded twisted pair (STP) cables.
To ensure FCC Class A and CE compliance, and for
optimum performance, STP cables are recommended.
Ensure that the twisted pair cables are terminated correctly •
and to the same standard at both ends (see "Terminating
shielded cable" on page 2-14).
Ensure that each RJ-45 connector is rmly seated in its •
receptacle and that each transmitter port is connected to
the correct receiver port (see pages 2-14 and 2-15).
Ensure that the length of the twisted pair cable does •
not exceed the guidelines for single link or dual link
connections (see page 2-16).
Image loss or jitter — DVI signals run at very high frequency
and are especially susceptible to bad video connections, too
many adapters, or cables that are too long. To avoid loss of an
image or introduction of image jitter:
The DVI cable on the input to the transmitter or the output •
from the receiver should not exceed 10' (3 m).
Use only cable designed for DVI signals. •
Limit or avoid the use of adapters, patch panels, or •
couplers with the input DVI cables, the output DVI cables,
and/or the twisted pair cables. Additional links in the
chain reduce signal integrity and overall cable length
performance.
Always turn on the display before the DVI video source in •
order for the source to retrieve the DDC from the display.
No video signal or incorrect resolution or refresh rate — If the
source device is not able to obtain EDID information when it is
being powered on, it may not be able to send a video signal or
the signal may have the wrong resolution or refresh rate.
Ensure that the DDC DIP switches are set correctly for the •
EDID source (see pages 3-2 to 3-5).
The source device must be powered on after the display •
device providing the EDID source has been powered on.
Incorrect color or tint — Ensure that the twisted pair cables are
terminated correctly and to the same standard on both ends of
the cable (see page 2-14 and 2-15).