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903-0623-00 Rev. A
D. GLINK FMB-X Fiber Multiplexer
This section is provided as a reference only for 903 systems using GLINK FMB-X systems. Information
about the FMB-VTX and FMB-VRX cards can be found in the 903-0602-00 user's guide.
Please refer to Appendix C for guidelines to upgrade to FMB-X-2.5 systems.
D.1
Remote GLINK FMB-X
Card P/N 903-5072-XX
Note: This card is obsolete and can no longer be ordered. Use the FMB-X-2.5 card for new
designs.
The front panel view of the remote GLINK FMB-X is shown in the following figure. Redundant ST fiber
connectors are accessible on the right angled turret. An internal splitter provides roughly equal power
output levels on both ST connectors. Output power should be greater than -6 dBm at 1310 nm (uplink).
Receive sensitivity at the turret should be better than -26 dBm at 1550 nm (downlink).
DIAGNOSTICS SERIAL
LEDs on the front panel match those described in the console GLINK FMB-X section and allow direct
monitoring of the optical link status (LINK), optical receive power (FO-RX), and the status (STAT) of the
on-board diagnostics. See the console GLINK FMB-X section for more details.
Diagnostics available at the 3.5 mm (1/8") stereo jack of the remote GLINK FMB-X are RS-232 format
and are compatible with the standard Model 903 Diagnostics Software. Remote diagnostics are
transmitted to the console module and typically monitored by the DB-9F RS-232 port on the console
FMB-VRX or the 3.5 mm stereo jack RS-232 port in the console GLINK FMB-X.
VIDEO SYNC
LEDS (SLOT A/B)
FMB-X STATUS LEDS
(LINK, FO-RX, STAT)
PORT (RS-232)
ETHERNET PORT
(10 Mbps)
Figure D.1-1: Remote GLINK FMB-X Front Panel View
Model 903 User's Guide, FMB-X-2.5 Version
MODEL 903
VIDEO/DATA
MULTIPLEXER
VIDEO
1 2 3 4
A
B
LINK
FO-RX
STAT
REDUNDANT
FIBER PORTS
(SPLITTER)
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