The module case versions are intended for isolated use and require an external power source. The OSD138 operates over up to 5km of standard low cost multimode fiber optic cable and over up to at least 50km of singlemode fiber.
Data OUTPUT OUTPUT Data FIGURE 2: OSD138 SINGLE FIBER WDM OPERATION PRODUCTS AND OPTIONS The standard configuration options available for the OSD138 are described in Table 1. TABLE 1: PRODUCT OPTIONS OPTION DESCRIPTION Stand-alone Modem Case Single mode operation WA or C.WA 1-fiber Wavelength Division Multiplexed (WDM) multimode operation with Tx:850nm &...
Page 6
Stand-alone case version (extrusion case) ITEM DESCRIPTION Two optical fiber operation or SFL version or SFM version Wavelength Division Multiplexed (WDM) single fiber operation with Tx @ 1310nm and Rx @ 1550nm. DOC ID: 10105510 PAGE 4 OSD138 OPERATOR MANUAL...
OPTICAL SYSTEMS DESIGN TECHNICAL SPECIFICATIONS Table 2 below provides the technical specifications for the OSD138 TABLE 2: TECHNICAL SPECIFICATIONS SPECIFICATION PERFORMANCE Data rate DC to 1Mbps NRZ Pulse Distortion and Jitter <±0.3µsec over full dynamic range Wavelength 850nm nominal (1300nm for the OSD138L) >-15 to -12dBm peak into 62.5/125 multimode fiber...
The modem case is floating and should be connected to ground. Failure to do so may result in interference on the data lines. When connecting data cables between the OSD138 and the host equipment please ensure that both equipment are grounded together otherwise unreliable data may occur.
OPTICAL SYSTEMS DESIGN 2 INSTALLATION AND OPERATION INTRODUCTION This section outlines the methods required to install and operate the OSD138 modem successfully. It should be studied carefully if damage to the equipment or poor results are to be avoided. This equipment has been fully tested prior to dispatch and is ready for immediate operation.
OSD138 DRAWINGS AND DIMENSIONS The OSD138 is designed to be mounted on an even surface and to be secured by means of M4 or smaller screws. The OSD138 card versions is designed to be inserted into a chassis and secured by means of captivated screws.
The OSD138 card version is powered from the OSD370 or OSD350 chassis. DC power on the OSD138 card version is connected via the DB9 connector. The card version of the OSD138 should be fixed into the chassis using the captivated screws and can be plugged in or out of the chassis with power on or off.
OPTICAL SYSTEMS DESIGN OSD138 OPERATION When using the OSD138 for the first time, check that the unit is in good condition with no visible damage. If a card version is used, insert it in an appropriate slot on the OSD chassis and check that the indicators illuminate as per Table 5 on power up.
2 wire RS485 operates by sending bursts of data onto a 2 wire bus. In order to determine the direction of transmission, the OSD138 accepts the first Logical High data signal coming from either copper or fiber as valid data and then inhibits any signals coming from the opposite direction. This inhibition lasts from 10µs to 30ms after the active signal returns to the Logical Low state.
Page 14
OPTICAL SYSTEMS DESIGN The 6-way data control switch is located at the front of OSD138 modem. Switches SW1 (T1), SW5 (T5) and SW6 (T6) are used for setting the data mode options. TABLE 6: DATA MODE SWITCH SETTINGS SWITCH STATE...
Visually check for the following: Check that the correct power source is connected to the power socket. σ Check that the data signals are connected to the modem correctly and that the distant OSD138 σ modem has been terminated correctly to any external equipment.
For warranty period, please call your local OSD distributor. REPAIRS Optical Systems Design reserves the right to repair or replace faulty modules/units. Please obtain a “Return Material Authorisation” (RMA) form and number before returning goods. Goods must be returned in adequate packing material to Optical Systems Design, Warriewood or its nominated authorised representative for all repairs.