IHSE USA 437 Series DDXi DVI/VGA Extender - Manual (Page 40)

DDXI DVI/VGA KVM EXTENDER FAMILY
40
7. Troubleshooting
7.1 Video
There isn’t a picture.
Check the power supply connection at the Local unit. Is the Device Ready
(Red LED) at the Local unit illuminated (see page 23)? If not, the internal
power-supply may be damaged or there may be an internal error.
Check the power supply connection at the remote unit. Is the Device Ready
(Red LED) at the Remote unit illuminated (see page 23)? If not, the internal
power-supply may be damaged or there may be an internal error.
Check that the Interconnection cable is connected at the Local Unit and the
Remote Unit. Is the Link Status LED illuminated (see page 23)? If not, there
may be a problem with the Interconnection cable:
•
Fiber types: Check that the fiber optical cable is correctly connected.
The strand connected to the Local Unit’s TX (left-hand connector) must
run to the Remote Unit’s RX (right-hand connector) and vice versa.
•
Fiber types: There may be one or more broken fibers. Do NOT look
into a fiber’s end directly while it is connected to a Local or Remote
unit! Are the Link Status LEDs at the Local Unit AND at the Remote
Unit illuminated? If they are flashing, check for broken fibers using a
flashlight.
•
Fiber types: Are the cables of the recommended fiber type? If you
used your own fiber optical cable (not supplied by Black Box), please
ensure that you have used 50µ or 62.5µ fiber with a multimode device
or a 9µ fiber with a singlemode device. Other fiber-types and poly-fibers
are not supported.
•
CATx types: Check that you have wired the cable ‘straight through’.
‘Cross wired’ cables will not work.
•
CATx types: Check that the cable is correctly wired. Use a CATx cable
tester for checking wrong wired or broken strands.
Check that you are using a supported video mode (see Appendix D: Video
Modes and Frame Rates
). At the Remote Unit, is the Video Signal LED
illuminated (see page 23)?
Check your total system configuration. Local units digitize incoming VGA
signals and must receive perfect SYNC signals: no glitches, spikes or
deformed signals are allowed. Long/wrong or bad cables, or additional
components like Splitters or KVM Switches may deform the SYNC signals.
Also check that the signals (level and signal form) match the VESA
Standard requirements.