OPTICAL SYSTEMS DESIGN
DOC ID: 10100110
OSD136 OPERATOR MANUAL
Page 12 of 16
CARD VERSION
The OSD136 card version is powered from the OSD370 or OSD350 chassis. DC power is connected
via a DB9 connector. The card version of the OSD136 should be fixed into the OSD370 (or OSD350)
chassis using the captivated screws. The card can be plugged in or out of the chassis with power on or
off.
2.2.4
OTHER CONNECTIONS
The RS232 signals are connected to or from external equipment by the 25 pin D connector according to
FIGURE 2.
Note the Signal Quality signal is at TTL levels and is normally High (>3.5V) with good optical input
and Low (<0.5V) when the optical input is too low.
The optical fiber must be terminated by the appropriate optical connector. Before connection, inspect
the end of the connectors to ensure that no dust or dirt is present as it could contaminate the modem
connector and result in poor performance.
If it is necessary to clean the cable connectors use isopropyl alcohol and lint-free tissue to remove
contamination.
2.2.5
CONTROLS
The OSD136 has no controls.
2.2.6
INDICATORS
The OSD136 has a bi-colour LED indicator located between the optical connectors. The LED colour
conditions are as follows;
•
RED - Received optical power level too low for reliable operation
or
no fiber link established.
•
GREEN – Fiber link established
and
received optical signal from the transmitted signal.
