8
Fiber Size
Connector
850nm
1300nm
50u, 62.5u MM
ST
-1
-3
50u, 62.5u MM
SMA
-2
-4
8/10u SM
FCPC
-
-7
Installation of XA-1900 in the MCR-1000A Card Cage
The XA-1900 can be used in the MCR-1000A rack-mountable card cage. In
order to accomplish this, it must first be mounted to an AP-1000 adapter plates
with the four enclosed nylon binder head screws. Then the 5 pin power
connector and BNC IRIG cable on the adapter plate must be connected. When
this is done, the unit is ready to be plugged into the card cage. All operating
power for the XA-1900 will then be provided by the MCR-1000A card cage.
The XA-1903 may be directly mounted in a standard 19 inch rack frame.
INSTALLATION INSTRUCTIONS FOR
RA-1900 AND XR-1900
Installation Procedure
The RA-1900 and XR-1900 are provided with a single control that will have to
be adjusted prior to putting the unit in service. This control is used to
compensate for existing optical cable attenuation. Since optical cable
attenuation is a function of the fiber optic cable used, the receiver will have to be
re-adjusted, with the actual fiber optic cable used in the system as follows:
1. Apply power and signal to both the RA-1900 to be used as well as the
matching XA-1900 or channel being used on the XA-1903. For alignment
purposes, the input signal to the transmitter should be a 1 KHz, 1 volt rms
sine wave.
2. Connect the fiber optic cable from the transmitter to the receiver, and a 600
ohm load resistor to the output connector of the receiver.
3. Connect an oscilloscope across the 600 ohm load resistor.
4. Adjust the output level control until 1 volt rms is obtained.
5. This completes alignment of the receiver.
9
The XR-1900 consists of an XA-1900 and RA-1900 in the same package. As a
result, the installation instructions for the XR-1900 transmitter section is the
same as for the XA-1900 and the installation instructions for the XR-1900
receiver section is the same as for the RA-1900.
BE CERTAIN TO READ AND OBSERVE THE WARNING
RELATING TO THE XR-1900 IN THE
XA-1900 SECTION OF THIS MANUAL.
Signal and Power Connections
The RA-1900 and XR-1900 may be powered from an external AC or DC power
supply. Pin connections are as follows:
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
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 Fiberlink 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:
Center pin
Signal
Outer shell
Signal return and ground