OFM-4218
I.R.T. Communications Pty Ltd | www.irtcommunications.com
Page 7 of 9
Revision 00
INSTALLATION
Installation in frame or chassis:
The OFM-4218 will only mount within an IRT 1RU or 4000 series 3RU frame.
Slide the unit through the front of the frame on the frame’s inside runners. If adjacent to another card’s rear
assembly it may be necessary to gently guide the optical connectors past the edge of the adjacent rear assembly.
Screw in the front panel mounting screws to lock into place. Screw the supplied rear cover plate that shows the
wavelength locations onto the rear of the frame using the supplied M2.5x10 pan head screws.
Fibre Connections:
The OFM-4218 card comes standard with eighteen LC/PC and one SC/PC female types of connectors for connection
with single mode fibre fitted with the corresponding mating male connectors.
There are eighteen LC/PC inputs/outputs labelled 1270nm, 1290nm, 1310nm, 1330nm, 1350nm, 1370nm, 1390nm,
1410nm, 1430nm, 1450nm, 1470nm, 1490nm, 1510nm, 1530nm, 1550nm, 1570nm, 1590nm and 1610nm. Each of
these inputs/outputs must mate with the same corresponding wavelength of a dFB (CWDM) type of laser
transmitter/receiver. Transmitters may be any type of IRT laser transmitter such as ASI/SDI, L-Band etc. just so long
as they are fitted with a dFB laser at the appropriate wavelength. Receiver modules are not wavelength sensitive
and will work with any of the input wavelengths.
The common I/O output of the OFM-4218 is the multiplexed version of the combined inputs. This feeds into the
input of a second OFM-4218 receiving unit via the SC/PC connector.
NOTE:
Depending on the type of fibre optic cable used, the total path length may be limited by the optical path
loss at the 1390nm and 1410nm wavelengths. This is a limitation of the optic fibre itself, not the OFM-4218.
