SILVERLINE VTX 03/09/08 User Guide Issue1
Page 8
8. FAULT DIAGNOSIS
The Cove Communications Fibre Optic Video Transmitters can only be fully tested in
conjunction with a known working Cove Communcations Fibre Optic Video Receiver.
However the LED indicators will give a guide as to its operation
FAULT
POSSIBLE CAUSE
Green LED 'OFF'.
D.C. power not present at the circular D.C. connector.
Incorrect wiring of the circular D.C. connector (reverse
polarity connection may damage the unit).
D.C. voltage is too low. This should not be below +11v.
Green LED 'ON' but No video signal connected to the unit.
Yellow LED is 'OFF'
Video signal level is non standard or too low in level.
Green and Yellow LED's Fibre optic cable loss is too high.
are 'ON' but there is no
Dirt in fibre optic connectors or the level is low due to
video output at the receiver a faulty optic transmitter diode (return to Cove
Communications for service)
Green and Yellow LED's
Mixed sync level at the transmitter is too high in
are 'ON' but the video output
amplitude compared to the peak white level.
level at the receiver is low in (Ensure your video source signal is compatible)
amplitude.
Green and Yellow LED’s Mixed sync level at the transmitter is too low in
are ‘ON’ but the video output amplitude compared to the peak white level.
level at the receiver is high in
amplitude.
-END-
This User Guide has been produced by Cove Communications and may not be copied or
reproduced in any way shape or form without the written permission of Cove Communications.
