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Operation, cont'd
Troubleshooting
No output signal — Check that the front panel LED is on (amber shows that the
unit is receiving power, green shows that it is also receiving an input signal). If
LED is not lit, check the power supply and the video input connections to the unit
(see pages
No output signal or poor quality signal — Check the integrity of the cabling from
the source device to the distribution amplifier and from the distribution amplifier to
each of the display devices.
•
•
•
•
Display device displays a flashing black or blue screen, snow or other distortion
— A device that is not HDCP compliant may be receiving HDCP-encrypted signals.
The DVI DA Plus series distribution amplifiers are not High-Bandwidth Digital
Content Protection (HDCP) compliant.
Signal on some displays but not others — Reboot the source device.
When the source device boots up, the EDID handling feature ensures that the
output resolution of the source device is matched to the requirements of the display
device with the lowest resolution.
If an additional display device is added, which requires an even lower resolution,
the image will not be displayed correctly on that monitor until the source device
is shut down and rebooted. At that time, EDID handling ensures that the output
resolution of the source device is recalibrated to meet the needs of the additional
display device.
3-4
DVI DA Plus Series • Operation
2-2 and
2-3).
DVI signals run at very high frequency and poor connections can cause
degradation or loss of the signal, or jitter.
Signal transmission distance can vary greatly and depends on signal resolution,
cable type, cable quality, graphics card and the display used in the system.
Use only cable that is designed for DVI signals.
Limit or avoid the use of adapters or couplers.
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