Artel FiberLink 1900 Series User manual

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MANUAL
Optic IRIG Transmission System
Installation and Operations
Manual
FiberLink
1900 Series

Page 2 FiberLink 1900 Series User’s Manual
FiberLink 1900 Series
Contents
Introduction ..............................................................3
Quick Installation Guide ...................................................4
Technical Specications ...................................................5
Theory of Operation ......................................................8
Functional Block Diagram .................................................8
Installation Instructions for XA-1900 and XA-1903..........................9
Installation Procedure ................................................9
Installation of XA/RA-1900 in 6000A Chassis...........................9
Signal and Power Connections........................................9
Operating Pointers ..................................................10
Installation Instructions for RA-1900 ......................................12
Installation Procedure ...............................................12
Installation of XA/RA-1900 in 6000A Card Cage.......................12
Signal and Power Connections.......................................13
Operating Pointers ..................................................14
IRIG System Conguration................................................15
Interface Troubleshooting ................................................16
Overall System Checkout and Troubleshooting Techniques ................16
Maintenance.............................................................18
Contents

Page 3FiberLink 1900 Series User’s Manual
FiberLink 1900 Series
Introduction
The FiberLink XA-1900 IRIG Fiber Optic Transmitter is designed to convert wide band IRIG
analog signals into modulated light for transmission over ber optic cables. The transmitter
employs linear, intensity modulation and is suitable for use with most optical bers. The
XA-1900 employs a single ended, unbalanced input which is compatible with all IRIG
input formats. There is only one operating control on the XA-1900 series. This is an input
attenuator, designed to allow input signals larger than the normal 1 volt rms level to be
accommodated. The XA-1903 is a 10 channel optical output version of the XA-1900 and is
designed for IRIG signal distribution applications.
The RA-1900 IRIG Fiber Optic Receiver is the companion receiver for the XA-1900 and
XA-1903. It converts the modulated light from a ber optic cable back into an exact
replica of the original transmitted signal. The RA-1900 is intended for driving single ended,
unbalanced loads in accordance with IRIG standards. There is only one operating control on
the RA-1900 series. This is an output level control and is used to compensate for the optical
attenuation of the ber being used.
Introduction
NOTE:
This manual references the following discontinued items:
XR-1900 - No longer in production, no inventory is available.
MCR-1000A - No longer in production, no inventory is available.

Page 4 FiberLink 1900 Series User’s Manual
FiberLink 1900 Series Technical Specications | Precautions
Quick Installation Guide
The following is a quick installation guide for the FiberLink XA-1900 and RA-1900. It is
intended for users familiar with the installation of ber optic transmission systems to get
“up and running” in minimal time. For additional details, or for installation of the XA-1903
please consult the balance of this manual.
Standalone Version
Rackmountable Versions
The FiberLink XA/RA-1900 are available in card versions that t the FiberLink 6000A rack-
mountable card cage. See ordering information on page 6 of this manual.
The FiberLink XA/RA-1900 box version may also be used with an existing MCR-1000A rack-
mountable card cage, which is no longer in production. AP-1000 Mounting brackets are
available for systems with existing MCR-1000A card cages.
Optical Conector IRIG Input or
Output BNC
Power
Connector
Note that Pin D is Connected
to the Housing
Pin B* = +15 to +24 VDC
Pin A* = 14 to 18 VAC 50/60 Hz
Pin D = DC or AC Common
XA-1900A
Test Point
Not used on
RA-1900A
*Use either AC (Pin A)
*or DC (Pin B). DO
*NOT USE BOTH!
RA-1900A
Output Level
Adjustment
Not used on
XA-1900A
or

Page 5FiberLink 1900 Series User’s Manual
FiberLink 1900 Series Technical Specications
General Specications
Number of Fibers XA-1900 & RA-1900: 1 ber
XA-1903: 10 bers
Operating Temperature -20 to +60 Degrees C
Operating Power (per unit) +15 to +25 volts DC @ 250 mA or
14 to 18 volts AC, 50/60 Hz
Dimensions XA-1900 & RA-1900:
5 W x 1.25 H x 2.5 L (inches)
127 W x 32 H x 64 L (mm)
XA-1903:
19 W x 1.75 H x 6.5 L (inches)
483 W x 45 H x 165 L (mm)
Weight XA-1900 & RA-1900:
Approx. 1 lb; 0.45 kg
XA-1903:
Approx. 3 lbs; 1.36 kg
Optical Connectors ST: Multimode, ST or FCPC: Single Mode
Indicator LEDs Box: None
Card Transmitter: Power, IRIG present, Alarm
Card Receiver: Power, IRIG present, Alarm
Optical Wavelength MM: 850 nm & 1310 nm
SM: 1310 nm
Optical Fiber 50 or 62.5 micron (MM) multimode ber,
8/10 micron (SM) single mode
System Delay < 5 uSec; Measured from a Transmitter input to a
Receiver output with 1 meter of ber. Does not
include any additional length of ber. Consult
ber cable manufacturer for specic propagation
delay. An approximate ber cable propagation
delay is approximately 5 uSec/km.
MTBF XA-1900: 195,000 hours
RA-1900: 181,000 hours
XA-1903: 74,000 hours
Plastic Material UL-94 V0 or V1 Standard

Page 6 FiberLink 1900 Series User’s Manual
FiberLink 1900 Series Technical Specications
Number
Part Number Description of Fibers
XA-1900-1 Transmitter, 850 nm, Multimode, Box, ST 1
XA-1900-C1S Transmitter, 850 nm, Multimode, Card, ST 1
XA-1900-3 Transmitter, 1310 nm, Multimode, Box, ST 1
XA-1900-C3S Transmitter, 1310 nm, Multimode, Card, ST 1
XA-1900-7 Transmitter, 1310 nm, Single Mode, Box, FCPC 1
XA-1900-7-ST Transmitter, 1310 nm, Single Mode, Box, ST 1
XA-1900-C7S Transmitter, 1310 nm, Single Mode, Card, ST 1
RA-1900-1 Receiver, 850 nm, Multimode, Box, ST 1
RA-1900-C1S Receiver, 850 nm, Multimode, Card, ST 1
RA-1900-3 Receiver, 1310 nm, Multimode, Box, ST 1
RA-1900-C3S Receiver, 1310 nm, Multimode, Card, ST 1
RA-1900-7 Receiver, 1310 nm, Single Mode, Box, FCPC 1
RA-1900-7-ST Receiver, 1310 nm, Single Mode, Box, ST 1
RA-1900-C7S Receiver, 1310 nm, Single Mode, Card, ST 1
XA-1903-1 Transmitter, 850 nm, Multimode, ST 10
XA-1903-3 Transmitter, 1310 nm, Multimode, ST 10
XP-1000A 115 volts AC, 50/60 Hz plug-in adaptor
XP-1001 230 volts AC, 50/60 Hz plug-in adaptor
AP-1000 Adapter Plate for use with the MCR-1000* card cage
• Please note that the card versions of these products are compatible with the model 6000A card
cage used with most FiberLink products and uses 1 slot.
• Box versions require the XP-1000A power supply, not included.
• The XA-1903 is a 1RU 19” rackmountable enclosure with internal power supply.
* Box versions can be adapted for use with the discontinued MCR-1000 rack by ordering the
AP1000 adapter plate.
Ordering Information

Page 7FiberLink 1900 Series User’s Manual
FiberLink 1900 Series Theory of Operation
Data Specications
Number of Channels 1
Number of Outputs per Channel XA-1900 & RA-1900: 1, XA-1903: 10
IRIG Compatibility A through H
System Bandwidth (+0, -3 dB) 20 Hz to 100 kHz
Input/Output Load Impedance 600 Ohms nominal
Input/Output Signal Voltage 1 volt rms
Signal/Noise Ratio 67 dB typical
Noise Floor (full bandwidth) 1.3 mv rms maximum
Wavelength Loss (dB) Distance (Km)
850nm MM 0-10dB 0-3.5 (62.5u)
850nm MM 0-10dB 0-4 (50u)
1310nm MM 0-13dB 0-10 (62.5u)
1310nm MM 0-13dB 0-12 (50u)
1310nm SM 0-13dB 0-20
* For system to operate properly, operating loss budget must not be exceeded.
Operating Loss Budget & Maximum Usable Distance*

Page 8 FiberLink 1900 Series User’s Manual
FiberLink 1900 Series Installation Instructions for XA-1900 and XA-1903
Theory of Operation
The FiberLink XA-1900 converts an incoming time code signal into a varying current that
intensity modulates the transmitting LED located in the optical connector on the unit.
The modulated light is then applied to a ber optic cable.
The RA-1900 detects the light coming from a ber optic cable by a photodiode located in
the optical connector on that unit. The small current produced by the photodiode is
amplied and applied to a driver stage. This stage provides the proper output voltage to
drive the required load. The output level adjustment is used to set the output audio to the
proper level.
Transmit
LED/LD
LED/LD Driver
Input Buer Amp
IRIG
Output
IRIG
Input
Attenuator
XA-1900 IRIG Transmitter Block Diagram
RA-1900 IRIG Receiver Block Diagram
IRIG
Output
Output DriverCurrent/Voltage
Converter
IRIG Output Level
Receive
Photo-
Diode
600

Page 9FiberLink 1900 Series User’s Manual
FiberLink 1900 Series
Transmit
LED/LD
IRIG
Output
Installation Procedure
The FiberLink XA-1900 is supplied pre-aligned for use with an input signal of 1 volt rms. It
may be put into service by simply making the appropriate signal and power connections.
When input voltages in excess of the normal 1 volt rms level are to be accommodated, the
following procedure (in particular, steps 2, 3, and 4) should be followed:
1. It will be necessary to have a source of +15 to +25 volts DC or 14 to 18 volts AC 50/60
Hz. Be certain to make all connections carefully and check that the correct pins are
being used.
2. Turn the input attenuator , located in the white plastic bushing between the electrical
connectors on the XA-1900, fully clockwise (10 - 15 turns will be (adequate). In the
XA-1903, this attenuator is located on the internal P/C board, near the input BNC
connector, and is labeled R1. When using the XA-1903, also set the rear panel input
switch to the 600 ohm position.
3. Apply power and, with no signal applied, connect an oscilloscope between the test
jack, located next to the optical output connector and the case of transmitter for the
XA-1900, and on the P/C board for the XA-1903. Any of the points labeled TP1, TP2,
TP3, TP4 or TP5 may be used. The oscilloscope will show the current owing through
the transmitting LED, which exactly corresponds to the signal being transmitted.
4. Apply the signal to be transmitted and slowly turn the attenuator until the signal
appears on the scope. Now continue to turn the attenuator until a maximum
peak-to-peak amplitude of 0.8 volts is obtained. This point constitutes full modulation.
If the signal level is increased further, distortion and clipping will occur. The best level
is just below the clipping point.
5. Once this adjustment has been made, the transmitter is ready for operation.
Installation of XA-1900 and RA-1900 in the 6000A Card Cage
The 6000A rack-mountable chassis is a 20 slot, 3RU chassis. The XA-1900 and RA-1900 are
available in card versions that t the 6000A rackmount chassis. The adjustment Potentiom-
eters are located on the front of the XA-1900 and RA-1900 cards.
The XA-1900 and RA-1900 cards take advantage of the Alarm function of the 6000A chassis
when using the 6020A ALARM Card. To activate the ALARM function, locate the ALARM
switch on the printed circuit board and set Position 1 to ON. The transmitter ALARM func-
tion will detect loss of input signal. The receiver ALARM function will detect loss of signal or
loss of optical input.
Installation Instructions for XA-1900 and XA-1903

Page 10 FiberLink 1900 Series User’s Manual
FiberLink 1900 Series Installation Instructions for XA-1900 and XA-1903
Signal and Power Connections
The XA-1900 box may be powered from an external AC or DC power supply.
Pin connections are as follows:
The transmitting element in the transmitter unit may
contain a solid state Laser Diode located in the optical
connector. This device emits invisible infrared electromag-
netic radiation which can be harmful to human eyes. The
radiation from this optical connector, if viewed at close
range with no ber optic cable connected to the optical
connector, may be sucient intensity to cause
instantaneous damage to the retina of the eye. Direct
viewing of this radiation should be avoided at all times!
PIN For DC Operation For AC Operation
A No Connection 14 to 18 volts 50/60Hz
B +15 to +25 volts No Connection
D DC Common AC Common
E No Connection No Connection
H No Connection No Connection
PIN Function
Center Pin Signal
Outer Shell Signal return and ground
Please note that AC and DC common is connected to the enclosure.
The mating power connector for this system is an Amphenol 126-223 or equivalent.
For operation from 115 VAC 60Hz, a Artel Video Systems XP-1000A plug-in adapter may be
used. This adapter is supplied with the appropriate connector installed.
Signal connections are made via a standard BNC type signal connector.
Pin connections are as follows: