Composite Video

USER’S MANUAL

3400 Series

WORLD HEADQUARTERS

55 Cabot Court

Hauppauge, N.Y. 11788 USA

Tel: (631) 273-0404

Fax: (631) 273-1638

www.commspecial.com

Email:

info@commspecial.com

Communications Specialties Pte Ltd

100 Beach Road

#22-09 Shaw Tower

Singapore 189702

Tel: +65 6391 8790 Fax: +65 6396 0138

Email:

csiasia@commspecial.com

P/N: 122230 Rev.

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TABLE OF CONTENTS

General Information .................................................... 2

Introduction ............................................................ 2

Technical Specifications .......................................... 2

Installation Instructions .............................................. 4

Installation Procedure ............................................. 4

Indicator LEDs and Alarm Circuitry ...................... 5

Operating Pointers and Trouble Shooting .................. 6

Optical Fiber ........................................................... 6

Trouble Shooting .................................................... 6

Maintenance ............................................................... 7

Statement of Limited Warranty .................................. 8

1



GENERAL INFORMATION

Introduction:

The Pure Digital Fiberlink

®

3400 Series is an adjustment-free

transmitter/receiver pair that transmits a single channel of com-

posite video over single mode or multimode fiber. A dual channel

rack card version is also available, which transmits two indepen-

dent channels over two separate fibers on one card.

The use of digital encoding assures high-quality noise-free trans-

missions that retain all of their initial parameters, regardless of

fiber optic cable attenuation. In addition, an integral indicator LED

is provided on each unit to continuously signify the presence of an

optical signal and thus, the proper operation of each side of the

system.

Technical Specifications:

Model Part Numbering Configurations:

Unit Type

Single Channel Transmitter Box

Single Channel Transmitter Rack Card

Dual Channel Transmitter Rack Card

Single Channel Receiver Box

Single Channel Receiver Rack Card

Dual Channel Receiver Rack Card

X Values: 1=850 nm MM

3=1310 nm MM

7=1310 nm SM

9=1550 nm SM

2

Part Number

3400-Bxy

3400-Cxy

3402-Cxy

3401-Bxy

3401-Cxy

3403-Cxy

Y Values: S=ST connector

F=FCPC connector



Video

Bandwidth ............................ 8MHz (-3dB)

Input/Output Impedance ....... 75 Ohms

Input/Output Voltage ............ 1 V p-p nom., 1.1 V p-p max.

Differential Phase ................. 1

o

typical

Differential Gain ................... 1% typical

Signal-to-Noise Ratio ........... 67dB NTSC / 62dB PAL/SECAM

(CCIR weighted)

Signal Connectors ................ BNC

Optical

Operating Wavelength .......... 850nm, 1310nm, 1550nm MM/SM

Optical Fiber

62.5/125 microns MM or

8-10/125 microns SM

Optical Connectors ............... ST or FCPC

Wavelength

Loss Budget (in dB) Distance* (in km)

850 MM

0-20

0-3

1310 MM

0-12

0-12

1310 SM

0-27

0-50

1550 SM

0-27

0-60

*Distance specifications are only approximate and are not guar-

anteed. Operating loss budget must not be exceeded.

Miscellaneous:

Operating Temp. Range ....... -35 to +75 degrees C

Operating Power ................... 9-24 Volts AC or DC@5 watts (max)

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CAUTION! The transmitting element in some versions of the Pure Digital

Fiberlink transmitter unit is a solid-state Laser Diode located in the optical connector

on the unit. This device emits invisible infrared electromagnetic radiation which can

be harmful to human eyes. The radiation from this optical connector, if viewed at

close range without a fiber optic cable connected to the optical connector, may be of

sufficient intensity to cause instantaneous damage to the retina of the eye. Direct

viewing of this radiation should be avoided at all times.

INSTALLATION INSTRUCTIONS

Installation Procedure

The 3400 Series transmission systems are preset for immediate

use. The following instructions describe the typical installation pro-

cedure and the function of the LED indicators located on each unit.

1. Connect the video source to the video input

BNC connector on the transmitter unit. If

using the dual channel card version, connect

both video inputs.

2. Connect the video output BNC(s) on the

receiver unit to the coax cable BNC connector(s).

3. Connect the fiber optic cable or cables between the two units.

4. Apply power to both Pure Digital Fiberlink units. Refer to Figure 1

for DC power connections.

5. When power is applied, the green POWER LED will light, indi-

cating the presence of operating power. On box units, the LINK

LED will give an indication as stated below. On card units, the

VIDEO LED will give an indication as stated below. (Dual channel

cards feature two LEDs - one corresponding to each channel.)

6. The system should now be operational.

Note that the rack card version will have an additional red LED for

indicating the presence of an alarm condition (loss of video).

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Indicator LEDs and Alarm Circuitry

Following is a description of the various conditions indicated by the

system’s LEDs:

TRANSMITTER and RECEIVER:

Power:

ON: (Green) Indicates that correct power has been

applied

TRANSMITTER:

Link or

OFF: Indicates no video detected on input BNC.

Video:

STEADY GREEN: Indicates video detected on input BNC.

Alarm:

ON: Loss of video (rack card only)

RECEIVER:

Link or

OFF: Indicates no video detected over fiber and, as a

Video:

result, no video present on output BNC

STEADY GREEN: Indicates video detected over fiber

and, as a result, video present on output BNC.

Alarm:

ON: Loss of input video or optical signal (rack card only)

Alarm Switch Settings (Transmitter; Card Version Only)

Switch Position

1

2

Switch Position

1

2

Alarm Indication

Loss of Video 1

Loss of Video 2

Alarm Indication

Loss of Signal

Loss of Signal

On

Enabled

Enabled

On

Enabled

Enabled

Off

Disabled

Disabled

Off

Disabled

Disabled

Alarm Switch Settings (Receiver; Card Version Only)

Note: “Loss of Video” refers to the loss of the respective video input.

“Loss of Signal” refers to the absence of either optical signal.

5



OPERATING POINTERS AND

TROUBLE SHOOTING

Optical Fiber:

The 3400 Series is available in versions that operate with most

multimode (MM) and single mode (SM) optical fibers. Be certain that

the correct size fiber is being used for the particular

transmitter/receiver combination.

Also be certain that the attenuation and bandwidth of the fiber

optic cable being used is within the range of the system’s loss budget

specifications.

Troubleshooting:

Multimode fiber optic cable contains an optical fiber with a light

carrying “core” that is only .0025 inches (62.5 microns) in diameter.

Single mode fiber optic cable has an even smaller “core,” only .00032

to .0004 inches (8-10 microns). This is smaller than a human hair! As

a result, any minute particles of dirt or dust can easily block the fiber

from accepting or radiating light. As a result, the key word is cleanli-

ness. Always use the dust caps provided with all optical connectors

whenever they are exposed to air. Also, it is a good idea to gently

clean the tip of an optical connector with a lint-free cloth moistened

with alcohol whenever dust is suspected.

The status of the LINK indicator LEDs should provide the first

clue as to the origin of any operational failure. If a LINK LED is off,

it usually means that the fiber is broken or has too much attenuation.

Next, be certain that the input and output signal connections are

proper.

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Finally, although multimode and single mode devices may look

the same, they will not operate properly together. Using the wrong

device or fiber can easily add more attenuation than specified,

resulting in poor overall performance.

If, after reviewing the above possibilities, the system is still not

operating, please contact the Customer Service Department for

further assistance.

MAINTENANCE

The Pure Digital Fiberlink 3400 Series transmission units have

been manufactured using the latest semiconductor devices and tech-

niques that electronic technology has to offer. They have been

designed for long, reliable and trouble-free service and are not

normally field repairable. Should difficulty be encountered, Com-

munications Specialties maintains a complete service facility to

render accurate, timely and reliable service of all products.

The only maintenance that can be provided by the user is to

ascertain that optical connectors are free of dust or dirt that could

interfere with light transmission and that electrical connections

are secure and accurate.

All other questions or comments should be directed to our

Customer Service Department. It should be noted the many “prob-

lems” can easily be solved by a simple telephone call.

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LIMITED WARRANTY

Communications Specialties, Inc. (CSI) warrants that for a period of

three years after purchase by the Buyer, the Pure Digital Fiberlink 3400

Series Transmission System will be free from defects in material and work-

manship under normal use and service. A Return Material Authorization

(RMA) number must be obtained from CSI before any equipment is re-

turned by the Buyer. All material must be shipped to CSI at the expense and

risk of the Buyer. CSI’s obligation under this warranty will be limited, at its

option, to either the repair or replacement of defective units, including

free materials and labor. In no event shall CSI be

responsible for any incidental or consequential damages or loss of profits

or goodwill. CSI shall not be obligated to replace or repair equipment that

has been serviced by unauthorized personnel, altered, improperly installed

or abused.

RMA numbers and repairs can be obtained from:

Communications Specialties, Inc.

55 Cabot Court

Hauppauge, NY 11788 USA

Tel: (631) 273-0404 Fax: (631) 273-1638

www.commspecial.com

Email: info@commspecial.com

Or, in the Asia Pacific Region:

Communications Specialties, Inc.

100 Beach Road

#22-09 Shaw Tower

Singapore 189702

Tel: +65 6391 8790 Fax: +65 6396 0138

Email: csiasia@commspecial.com

Please have your serial number (located on the top label of the unit)

available when contacting us.

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