Leitch X75 HD - Handling and Connecting Fibers

258 X75HD/X75SD Installation and Operation Manual
Appendix C: Servicing
Handling and Connecting Fibers
Class 1 Laser Products
The X75OPT-HDUPG module with HDTV fiber input/output is a
CLASS 1 laser product.
Avoid looking directly at a laser. Laser radiation is invisible and can
cause serious eye damage.
Table C-1. Function and Description of Fiber Optic Components
Item Function Composition
Optical transmitter Converts a data signal into
an equivalent optical power
waveform and couples it
into an optical fiber.
• Laser diode
• Laser diode driver
The role of the driver is to bias the laser. Some laser
drivers contain circuitry to control power and temperature.
Optical receiver Converts the incoming
optical power signal into an
output data signal.
• PIN photo diode
• Transimpedance amplifier
• Decision circuitry
The receiver circuitry provides standard ECL outputs
based on the input voltage.
Caution
USE OF CONTROLS OR
ADJUSTMENTS OR
PERFORMANCE OF
PROCEDURES OTHER
THAN THOSE SPECIFIED IN
THIS MANUAL MAY
RESULT IN HAZARDOUS
RADIATION EXPOSURE.
LASER
!DANGER!
Class 1 Laser Product
Avoid Direct Exposure