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3. No optical power,
LED not
illuminated
4. Optical power light
illuminated with
disconnected optical
input.
Table 9 Troubleshooting the Transmitter (Continued)
page 30
a. No optical power, LED not
illuminated.Transmitter is not
functioning, see above.
b. There is a break or severe bend in
the fiber optic cable. Use an optical
power meter or another functioning
receiver unit to verify optical power
coming down the fiber.
c. Optical power too low, too many
splits, too long a distance (thus
exceeding optical budget). System
may still function without LED illu-
minated although at reduced perfor-
mance.
Leaky photodiode or DC Amplifier
offset. Unit may still function,
otherwise contact factory.
Document no. 93-005-50-A
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