MultiDyne FMX-125 - Manual (Page 6)

Instruction Manual, FMX-125 OPERATION and CONNECTIONS 6
OPTICAL PRECAUTIONS and REQUIREMENTS:
Extreme caution should be used when handling Laser equipment. Appropriate eye
protection should be worn at all times. Direct exposure to the eyes and skin can be harmful.
The audio, data and optical connections can be found in the sections above. There are no user
serviceable parts or adjustments inside the system. The only user controls and interfaces are
present on the front and rear panels. If service or calibration adjustments are necessary, please
return the system to the factory.
When installing a 1300nm Singlemode Laser system the launched optical power can vary
from -10 dBm to +3 dBm depending on the model purchased. The receiver will compensate for
variations in optical attenuation. If the systems are used over very short distances with minimal
optical attenuation, the receiver may become over loaded. In this case, an external optical
attenuator should be used:
For a 1300 nm Laser System, use a -5 to -10 dBm attenuator for short distances.
The FMX-125 for Singlemode applications all have an optical window from the wavelength
of 1100 to 1600 nm. If a Singlemode system is to be Wave Division Multiplexed with other
optical wavelengths in the 1100 to 1600 nm range, the appropriate optical filters and wave
division multiplexers should be used. The user may contact MULTIDYNE to purchase such
devices.
The optical fiber should be free of defects or flaws. The optical fiber should not have any
excessive bends or micro-bends as this will attenuate or cause optical power to be lost. Proper
splicing and connectorization techniques should be used. Improperly assembled, cleaved and
polished optical connectors can cause significant optical losses and reflections. All optical
connectors should be inspected with a microscope for cracks, chips or any blemishes on the
optical surface.
INSTALLATION
BREAKOUT BOARD
The DB9 and SCSI connections to the FMX-125 are on the rear of the board. The breakout
board front panel is divided into several sections, from left to right:
1. Jumpers for 100 ohm terminations for the data inputs. There is a jumper for each of the 12
data channels. Place a jumper in the “on” position if RS422/485 is used for that channel.
2. Screw terminals for the 12 data inputs to the breakout board. There are 3 rows, from top to
bottom: Ground, inverting input, non-inverting input for each channel. When using RS232,
use only the ground and inverting connections. If an input is RS422/485, set its
corresponding termination jumper accordingly.
3. Screw terminals for the 12 data outputs. There are 3 rows as above.
4. Balanced audio inputs and outputs. The AUOx labels refer to audio output; the AUIx labels
refer to audio input, where the x denotes the channel. The G label is ground. If your audio
is unbalanced, connect to the non-inverting audio terminal and ground.