Versitron F282x Technical Manual

F282x

FOM II Series

Fiber Optic Modem

Technical Manual

February 1999

Revision C

Copyright February 1999

VERSITRON

83 Albe Drive / Suite C

Newark, DE 19702

www.versitron.com

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 one year

from date of delivery. We will 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 [phone] and obtain a Return Authorization Number. This number
must be referenced on the box the item is shipped in.

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 ................................................................................ 1

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

SECTION 2: INSTALLATION

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

2.2 SITE SELECTION.......................................................................................................... 5

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

2.4 SWITCH SETTINGS...................................................................................................... 5

2.5 TIMING MODE.............................................................................................................. 7

2.5.1 SOURCE TIMING.......................................................................................................... 7

2.5.2 TERMINAL TIMING ..................................................................................................... 7

2.5.3 INTERNAL TIMING...................................................................................................... 8

2.6 LOOPBACK ................................................................................................................... 9

2.6.1 FIBER/COPPER LOOPBACK....................................................................................... 9

2.6.2 REMOTE/LOCAL LOOPBACK.................................................................................... 9

2.7 INITIAL CHECKOUT PROCEDURE ........................................................................... 9

SECTION 3: OPERATION

3.1 INTRODUCTION........................................................................................................... 10

3.2 STATUS INDICATORS/AUDIBLE ALARM............................................................... 10

3.3 OPERATING CONTROLS ............................................................................................ 10

SECTION 4: THEORY OF OPERATION

4.1 INTRODUCTION........................................................................................................... 11

SECTION 5: MAINTENANCE AND TROUBLESHOOTING

5.1 INTRODUCTION........................................................................................................... 12

5.2 FAULT ISOLATION...................................................................................................... 12

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LIST OF ILLUSTRATIONS

FIGURE TITLE PAGE

1. OVERALL VIEW, F282X MODEM.................................................................................. 2

2. INTERFACE EXTENDER CONFIGURATION ............................................................... 2

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

4. SWITCH SETTINGS.......................................................................................................... 6

5. INTERNAL TIMING MODES........................................................................................... 8

LIST OF TABLES

TABLE TITLE PAGE

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

2. SWITCH 3 SETTINGS FOR INTERNAL TIMING.......................................................... 6

3. MODEL F282X SWITCH SETTINGS............................................................................... 7

4. NON-OPERATIONAL INDICATORS .............................................................................. 12

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DESCRIPTION OF EQUIPMENT

1.1 INTRODUCTION

This manual provides general and detailed information on the installation and operation of the
Model F282X FOM II Series Fiber-optic Modems. Section 1 contains a general description of the
equipment. Section 2 covers 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 Model F282X products.

Model Number Part Number Description

F2822 19932-02

F2824 19932-04

F2825 19932-05

1.2 DESCRIPTION OF EQUIPMENT

1.2.1 Functional Characteristics

The Model F282X products are fiber-optic links designed for use as an RS-530 interface
extender (See Figure 2) or a modem link (See Figure 3). These units are DTE/DCE switch selectable
and interface with other VERSITRON FOM II series F282X Fiber Optic Modems. Model F2822 uses
multimode fiber-optic cable of up to 2 Km (6,560 ft.), Model F2824 uses multimode fiber optic cable of
up to 6 Km (19,680 ft.) and Model F2825 uses single mode fiber optic cable of up to 14 Km (45,920 ft.).
The link has a maximum data rate of 76.8 Kbps, providing synchronous, asynchronous or isochronous
full-, half-duplex, or simplex data transmission with fully transparent operation. The unit has internal
clock generation for 18 set frequencies. The Model F282X FOM II modems fully support the interface
control signals associated with the EIA RS-530 and MIL-STD-188-114 standards. This is accomplished
by multiplexing the control signals along with clock and data signals and transmitting this serialized
signal to the remote unit. At the remote unit the signal is demultiplexed and applied to the interface.

1.2.2 Physical Characteristics

The Model F282X FOM II products measure 7.0" wide x 0.84" high x 11.6" deep and are
designed to be placed in a variety of VERSITRON enclosures and chassis (see Table 1 for dimensions of
enclosures and chassis). "Desktop" options include both single- and dual-card enclosures. Rack-mount
options include a 2-card and 20-card chassis. The Unit requires a wall transformer for desktop or 2-card
rack mount operation, with a one-pin connector for electrical input on the back of the card. There is a
female DB25 connector for the RS-530 interface and two ST connectors for the fiber-optic interface,
also on the back of the card. The unit requires a VERSITRON Model AC150W rack-mount power
supply for 20-card operation. Two power supplies are required for redundancy. The unit has seven
indicators: power (PWR), alarm (ALM), transmit data (TXD), receive data (RXD), transmit clock
(TXC), receive clock (RXC), and loopback (LB).

SECTION 1

RS-530, 0-76.8 Kbps, multimode, 850nm, ST connectors,
2 Km operational distance.
RS-530, 0-76.8 Kbps, multimode, 1300nm, ST connectors,
6 Km operational distance.
RS-530, 0-76.8 Kbps, multimode, 1300nm, ST connectors,
14 Km operational distance.

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