Versitron F2238, F2245, F2240 Technical Manual

F2238 / F2240 / F2245

FOM II Series

RS-530

High-Speed

Fiber Optic Modem

Technical Manual

June 2004

Copyright June 2004

VERSITRON, Inc.

83 Albe Drive / Suite C

Newark, DE 19702

www.versitron.com

E040619643

PROPRIETARY DATA

All data in this manual is proprietary and may not be disclosed,

used or duplicated, for procurement or manufacturing purposes,

without prior written permission by

VERSITRON, Inc.

WARRANTY

All VERSITRON products are warranted against defects in materials and workmanship for a period of one year from

date of delivery. VERSITRON reserves the right to repair or, at our option, replace parts which during normal usage
prove to be defective during the warranty period provided that:

1. You call VERSITRON at 302-894-0699 or 800-537-2296 and obtain a Return Maintenance Authorization (RMA)
Number. Please reference your RMA number on the outside of the shipping box.

2. Shipping charges are pre-paid.

No other warranty is expressed or implied and we are not liable for consequential damages. For repairs outside of the

warranty period, the same procedure must be followed.

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TABLE OF CONTENTS

PARAGRAPH TITLE PAGE

SECTION 1: DESCRIPTION OF EQUIPMENT

1.1 INTRODUCTION .....................................................................................................1

1.2 DESCRIPTION OF EQUIPMENT ...........................................................................1

1.2.1 Functional Characteristics .........................................................................................1

1.2.2 Physical Characteristics.............................................................................................2

1.3 SPECIFICATIONS....................................................................................................4

SECTION 2: INSTALLATION

2.1 GENERAL.................................................................................................................5

2.2 SITE SELECTION AND MOUNTING....................................................................5

2.3 POWER REQUIREMENTS......................................................................................5

2.4 JUMPER SETTINGS ................................................................................................6

2.4.1 Polarity Straps............................................................................................................6

2.4.2 Jumpers For Input Impedance Selection....................................................................7

2.4.3 Jumpers For Transmit Clock Selection......................................................................7

2.4.4 Jumpers For Receive Clock Selection .......................................................................7

2.4.5 Settings for Balanced/Unbalanced Outputs...............................................................7

2.5 OUTPUT CONNECTIONIS .....................................................................................7

2.6 LOOPBACK..............................................................................................................8

2.7 INITIAL CHECKOUT PROCEDURE .....................................................................8

SECTION 3: OPERATION

3.1 INTRODUCTION .....................................................................................................9

3.2 STATUS INDICATORS ...........................................................................................9

3.3 BIT RATE MONITOR..............................................................................................9

3.4 CLOCK SELECT OPTIONS ....................................................................................9

SECTION 4: THEORY OF OPERATION

4.1 INTRODUCTION .....................................................................................................10

SECTION 5: MAINTENANCE AND TROUBLESHOOTING

5.1 INTRODUCTION .....................................................................................................11

5.2 FAULT ISOLATION ................................................................................................11

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LIST OF ILLUSTRATIONS

FIGURE TITLE PAGE

1. OVERALL VIEW .........................................................................................................2

2. MODEM LINK CONFIGURATION............................................................................3

3. MODEM JUMPER AND TEST POINT LOCATIONS ...............................................6

LIST OF TABLES

TABLE TITLE PAGE

1. ENCLOSURES / CHASSIS ..........................................................................................3

2. JUMPER SETTINGS ....................................................................................................6

3. ELECTRICAL (DB25) INTERFACE PINOUT ...........................................................8

4. NON-OPERATIONAL INDICATORS ........................................................................11

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SECTION 1

DESCRIPTION OF EQUIPMENT

1.1 INTRODUCTION

This manual provides general and detailed information on the installation and operation of
Model F22XX FOM II Series RS-530 High-Speed Fiber Optic Modems. Section 1 contains a
general description of the equipment. Section 2 contains installation instructions. Section 3
contains operating instructions. Section 4 provides the theory of operation. Section 5 contains
maintenance and troubleshooting information. Figure 1 is an overall view of the F22XX circuit
card assembly.

Model Number Part Number Description

RS-530 High-Speed Fiber Optic Modem, duplex,

F2238 19643-02

multimode, 850 nM, ST connectors, 250 Bps – 10 Mbps,
distances to 2 Km*.
RS-530 High-Speed Fiber Optic Modem, duplex,

F2240 19643-04

multimode, 1300 nM, ST connectors, 250 Bps – 10 Mbps,
distances to 6 Km*.
RS-530 High-Speed Fiber Optic Modem, duplex, single

F2245 19643-05

mode, 1300 nM, ST connectors, 250 Bps – 10 Mbps,
distances to 15 Km*.

* Note: Multimode tests performed @ 100 Kbps on 62.5/125 µM fiber optic cable.
Single mode tests performed @ 100 Kbps on 10/125 µM fiber optic cable.

1.2 DESCRIPTION OF EQUIPMENT

1.2.1 Functional Characteristics

Model F22XX modems are high-speed modems that allow the full duplex transmission of
data, clock and a control signal (data terminal ready (DTR), data set ready/data carrier detect
(DSR/DCD)) over fiber optic cable. Figure 2 shows the modem link configuration. The fiber
circuit consists of two modems connected by two fiber optic strands with data rates and electrical
signal characteristics that conform to EIA RS-530 and MIL-STD-188-114 balanced/unbalanced
standards. The modems provide synchronous or asynchronous data transmission at speeds up to
10 Mbps. The link is fully transparent in both directions and is data agile. Model F2238 modems
are installed with 850 nM multimode optics and operate at distances of up to 2 Km (1.25
mi./6,600 ft.) on multimode fiber cable. Model F2240 modems installed with 1300 nM
multimode optics operate at distances of up to 6 Km (3.7 mi./19,680 ft.) on multimode fiber
cable. Model F2245 modems installed with 1300 nM single mode optics operate at distances of
up to 15 Km (9.3 mi./49,100 ft.) on single mode fiber cable. Basically, model F22XX modems
operate as two channel multiplexers/modems. For high-speed synchronous operation the first
channel is used for data and the second for transmit clock. Both channels may be used for data
in low-speed, asynchronous operation at less than 100 Kbps.

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