IRT OFM-4218 User manual

OFM-4218
I.R. T. Communications Pty L t d | www .i rtcommunication s. c o m
Revision 00
18 Channel CWD Fibre Optic ultiplexer/Demultiplexer
User Manual

OFM-4218
I.R. T. Communications Pty L t d | www .i rtcommunication s. c o m
Page 2 of 9 Revision 00
18 CHANNEL CWDM FIBRE OPTIC MULTIPLEXER DEMULTIPLEXER
Revision History:
Revision Date By Change Description Applicable to:
00 24/03/2016 AL Original Issue. Serial Numbers
≥ 1601001

OFM-4218
I.R. T. Communications Pty L t d | www .i rtcommunication s. c o m
Page 3 of 9 Revision 00
USER MANUAL
Table of Contents:
Section Page
Revision History 2
Operational Safety 4
General Description 5
Technical Specifications 6
Installation 7
Fibre Connections 7
Front and rear layouts 8
aintenance & Storage 9
Warranty & Service 9
This instruction book applies to units later than S/N 1601001.

OFM-4218
I.R. T. Communications Pty L t d | www .i rtcommunication s. c o m
Page 4 of 9 Revision 00
OPERATIONAL SAFETY
Optical Safety
The light emitted from the LASER diode used in this system is
invisible and may be harmful to the human eye. Avoid looking
directly into the fibre optic cable or connectors or into the
collimated beam along their axis when the device is in operation.
Operating the LASER diode outside of its maximum ratings may
cause device failure or a safety hazard.

OFM-4218
I.R. T. Communications Pty L t d | www .i rtcommunication s. c o m
Page 5 of 9 Revision 00
GENERAL DESCRIPTION
The OF -4218 is coarse wave division optical wavelength division multiplexer / demultiplexer (CWD ) for
combining and separating up to eighteen optical signals of 1270nm, 1290nm, 1310nm, 1330nm, 1350nm, 1370nm,
1390nm, 1410nm, 1430nm, 1450nm, 1470nm, 1490nm, 1510nm, 1530nm, 1550nm, 1570nm, 1590nm and
1610nm wavelengths for either uni-directional or bi-directional transmission on the one fibre.
With the high cost of hiring or installing additional dark fibre it makes economical sense to maximise the use of
existing infrastructure.
Used in combination with IRT’s extensive range of fibre transmitters / receivers and interface modules, a myriad of
different signals types can be sent down the one fibre. With IRT’s eighteen channel fibre multiplexer/demultiplexer
modules, for example, up to 144 SDI signals can be sent down a single fibre. Or up to 576 ASI signals can be sent
when also used with IRT’s ASI multiplexer/demultiplexer modules.
The OF -4218 is designed to mount in IRT’s 1RU or 4000 series 3RU frame.
Standard features:
• Eighteen set CWDM optical wavelength inputs and outputs.
• Uni-directional or bi-directional operation .
• Low insertion loss.
• Connections made by LC PC and SC PC connectors .
BLOCK DIAGRAM OFM-4218 SIGNAL PATH
Single
Fibre
OFM-4218
1270nm
1290nm
1310nm
1330nm
1350nm
1370nm
1390nm
1410nm
1430nm
1450nm
1470nm
1490nm
1510nm
1530nm
1550nm
1570nm
1590nm
1610nm
I/O
OFM-4218
1270nm
1290nm
1310nm
1330nm
1350nm
1370nm
1390nm
1410nm
1430nm
1450nm
1470nm
1490nm
1510nm
1530nm
1550nm
1570nm
1590nm
1610nm
I/O
1290nm Tx/Rx
1330nm Tx/Rx
1370nm Tx/Rx
1270nm Tx/Rx
1310nm Tx/Rx
1350nm Tx/Rx
1390nm Tx/Rx
1410nm Tx/Rx
1450nm Tx/Rx
1490nm Tx/Rx
1530nm Tx/Rx
1430nm Tx/Rx
1470nm Tx/Rx
1510nm Tx/Rx
1550nm Tx/Rx
1570nm Tx/Rx
Rx/1290nm Tx
Rx/1330nm Tx
Rx/1370nm Tx
Rx/1270nm Tx
Rx/1310nm Tx
Rx/1350nm Tx
Rx/13909m Tx
Rx/1410nm Tx
Rx/1450nm Tx
Rx/1490nm Tx
Rx/1530nm Tx
Rx/1430nm Tx
Rx/1470nm Tx
Rx/1510nm Tx
Rx/1550nm Tx
Rx/1570nm Tx
1590nm Tx/Rx
1610nm Tx/Rx
Rx/1590nm Tx
Rx/1610nm Tx

OFM-4218
I.R. T. Communications Pty L t d | www .i rtcommunication s. c o m
Page 6 of 9 Revision 00
TECHNICAL SPECIFICATIONS
Type 18 Channel CWD multiplexer.
Wavelengths 1270 nm, 1290 nm, 1310 nm, 1330 nm, 1350 nm, 1370 nm, 1390nm, 1410nm,
1430 nm, 1450 nm, 1470 nm, 1490 nm, 1510 nm, 1530 nm, 1550 nm, 1570 nm,
1590 nm and 1610 nm.
Fibre Single mode.
Connector Type 18 x LC/PC; and 1 x SC/PC Common I/O.
Maximum Power Handling 500 mW.
Channel Passband ± 6.5 nm.
Insertion loss ≤ 3.2 dB (typically 3.0 dB).
Passband Ripple < 0.3 dB.
Return Loss > 45 dB (typically 50 dB).
Directivity > 50 dB.
Channel Isolation > 30 dB (typically 40 dB).
Non Adjacent Channel Isolation > 40 dB (typically 50 dB).
Polarization Dependent Loss < 0.2 dB.
Other:
Temperature range -10 - 70° C ambient.
Mechanical Suitable for mounting in IRT 19" 1RU or 4000 series 3RU rack chassis with input
and output connections on the rear panel.
Finish Front panel Grey background, black lettering & red IRT logo.
Rear assembly Common connection mounted on bracket from main PCB.
Dimensions 6 HP x 3 U x 220 mm IRT Eurocard.
Due to our policy of continuing development, these specifications are subject to change without notice.

OFM-4218
I.R. T. Communications Pty L t d | www .i rtcommunication s. c o m
Page 7 of 9 Revision 00
INSTALLATION
Installation in frame or chassis:
The OF -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 2.5x10 pan head screws.
Fibre Connections:
The OF -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 (CWD ) 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 OF -4218 is the multiplexed version of the combined inputs. This feeds into the
input of a second OF -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 OF -4218.

OFM-4218
I.R. T. Communications Pty L t d | www .i rtcommunication s. c o m
Page 8 of 9 Revision 00
Front & rear panel connector diagrams :

OFM-4218
I.R. T. Communications Pty L t d | www .i rtcommunication s. c o m
Page 9 of 9 Revision 00
MAINTENANCE & STORAGE
Maintenance:
No regular maintenance is required.
Care however should be taken to ensure that all connectors are kept clean and free from contamination of any
kind. This is especially important in fibre optic equipment where cleanliness of optical connections is critical to
performance.
Storage:
If the equipment is not to be used for an extended period, it is recommended the whole unit be placed in a sealed
plastic bag to prevent dust contamination. In areas of high humidity a suitably sized bag of silica gel should be
included to deter corrosion.
Where individual circuit cards are stored, they should be placed in antistatic bags. Proper antistatic procedures
should be followed when inserting or removing cards from these bags.
WARRANTY & SERVICE
Equipment is covered by a limited warranty period of three years from date of first delivery unless contrary
conditions apply under a particular contract of supply. For situations when “No Fault Found” for repairs, a
minimum charge of 1 hour’s labour, at IRT’s current labour charge rate, will apply, whether the equipment is
within the warranty period or not.
Equipment warranty is limited to faults attributable to defects in original design or manufacture. Warranty on
components shall be extended by IRT only to the extent obtainable from the component supplier.
Equipment return:
Before arranging service, ensure that the fault is in the unit to be serviced and not in associated equipment. If
possible, confirm this by substitution.
Before returning equipment contact should be made with IRT or your local agent to determine whether the
equipment can be serviced in the field or should be returned for repair.
The equipment should be properly packed for return observing antistatic procedures.
The following information should accompany the unit to be returned:
1. A fault report should be included indicating the nature of the fault
2. The operating conditions under which the fault initially occurred.
3. Any additional information, which may be of assistance in fault location and remedy.
4. A contact name and telephone and fax numbers.
5. Details of payment method for items not covered by warranty.
6. Full return address.
7. For situations when “No Fault Found” for repairs, a minimum charge of 1 hour’s labour will apply,
whether the equipment is within the warranty period or not. Contact IRT for current hourly rate.
Please note that all freight charges are the responsibility of the customer.
The equipment should be returned to the agent who originally supplied the equipment or, where this is not
possible, to IRT directly. Details of IRT’s direct address can be found at I.R.T. Communications’ website.
Web address: www.irtcommunications.com
Email: [email protected]