Video with 4 Channels Audio

3440 Series

USER’S MANUAL

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: 121671 Rev.

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CONTENTS

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

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

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

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

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

System Switch Settings..………………………. .................. 5

Alarm Switch Settings ........................................................... 5

System Terminal Block Connections..……………….. ......... 6

Indicator LEDs and Alarm Circuitry ...................................... 7

Operating Pointers and Troubleshooting ........................................................ 8

Maintenance

.......................................................................................... 10

Statement of Limited Warranty .................................................................... 11

Copyright ©2004, Communications Specialties, Inc.

Fiberlink and the Starburst logo are registered trademarks of Communications

Specialties, Inc.

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GENERAL INFORMATION

Introduction

The Pure Digital Fiberlink® 3440 series optical transmission system is a

configurable, adjustment-free transmitter/receiver pair that employs digital pro-

cessing and transmission techniques to convey 1-way video and up to four

channels of 1-way audio signals.

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

Unit Type

Configurations:

Transmitter Box

Transmitter Card

Receiver Box

Receiver Card

Part Number

3440-BXY

3440-CXY

3441-BXY

3441-CXY

Y Values:

S = ST connector

F = FCPC connector

Audio:

Bandwidth ................................ 20 Hz to 20 kHz (-3dB)

Input/Output Impedance ........... 600 Ohms or 24k Ohms, balanced or unbalanced

Input/Output Voltage ................. 0dBm nominal +10dBm max.

THD ........................................ 0.1% typical

Signal to Noise Ratio ................ 85dB

Signal Connectors ..................... Removable terminal block

2

X Values:

1 = 850 nm Multimode

3 = 1310 nm Multimode

7 = 1310 nm Single Mode

9 = 1550 nm Single Mode



Video:

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

Input/output Impedance ................. 75 Ohms

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

Differential Phase .......................... 1° typical

Differential Gain ............................ 1.5% typical

Signal to Noise Ratio ..................... 60 dB CCIR weighted

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

Optical:

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

Optical Fiber .................................. 62.5/125microns MM or

8-10/125 microns SM

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

Wavelength

850 MM

1310 MM

1310 SM

1550 SM

Loss Budget (in dB)

0-18

0-14

0-20

11-28

Distance* (in km)

0-2

0-14

0-50

35-90

*Note: Distance specifications are only approximate and are not guaranteed.

Operating loss budget must not be exceeded.

Misc:

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

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

CAUTION!

The transmitting element in some versions of the Pure Digital Fiber-

link transceiver unit is a solid-state Laser Diode located in the optical connec-

tor 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.

3



INSTALLATION INSTRUCTIONS

Installation Procedure

The Pure Digital Fiberlink 3440 Series transmission systems are normally preset for

immediate use with audio input circuitry set for balanced 600 Ohm input impedance

and output set for balanced audio. If a different protocol is desired, it can easily be

selected using the flip switches located on the back panel of the unit. (See next

page.) The following steps describe the typical installation procedure and the func-

tion of the LED indicators.

1.

The various options, as already mentioned, have been preset. If unbalanced

high-input impedance or unbalanced output is desired, please refer to instruc-

tions on the following page.

2.

Connect the fiber optic cable or cables between

the two units.

3.

Apply power to both Pure Digital Fiberlink units.

Refer to Figure 1 for DC power connections.

4.

When power is applied, the green POWER LED will light, indicating the

presence of operating power. The green LINK LED will give an indication

stated on page 7. Note that the rack card version will have a third red LED

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

5.

Connect the audio input signals to the proper positions on the removable

terminal blocks. Check all connections and assure that inputs and outputs are

not intermixed. Refer to the next section for the various connections.

6.

The system should now be operational.

System Switch Settings

The audio interface circuit used in this product has external switches that are used

to configure the various signal options. If you wish to make changes to the factory

default settings, please refer that the charts on the following page.

4



Audio Input (Transmitter Unit)

Audio Input

Channel

1

2

3

4

Switch

Position

1

2

3

4

5

6

7

8

On

600 Ohm input impedance

unbalanced input

600 Ohm input impedance

unbalanced input

600 Ohm input impedance

unbalanced input

600 Ohm input impedance

unbalanced input

Off

24k Ohm input impedance

balanced input

24k Ohm input impedance

balanced input

24k Ohm input impedance

balanced input

24k Ohm input impedance

balanced input

Audio Output (Receiver Unit)

Audio Output Switch

Channel

Position

On

1

1

unbalanced output

2

2

unbalanced output

3

3

unbalanced output

4

4

unbalanced output

Off

balanced output

balanced output

balanced output

balanced output

Note: Switches 5,6,7 and 8 are not used and should be left in the off position.

Alarm Switch Settings (Transmitter; Card Version Only)

Switch Position Alarm Indication

1

Loss of Video

2

N/A

On

Enabled

N/A

Off

Disabled

N/A

Alarm Switch Settings (Receiver; Card Version Only)

Switch Position Alarm Indication

1

Loss of Signal

2

N/A

On

Enabled

N/A

Off

Disabled

N/A

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

to the absence of an optical signal or input video.

5



System Terminal Block Connections

The various input and output connections for the Pure Digital Fiberlink 3440

Series system are as follows:

Video Input or Output:

Audio Connector - Transmitter Unit:

Balanced

Position 1-

Channel 1 Input (-)

Position 1+

Channel 1 Input (+)

Position G

Ground

Position 2-

Channel 2 Input (-)

Position 2+

Channel 2 Input (+)

Position 3-

Channel 3 Input (-)

Position 3+

Channel 3 Input (+)

Position G

Ground

Position 4-

Channel 4 Input (-)

Position 4+

Channel 4 Input (+)

Audio Connector - Receiver Unit:

Balanced

Position 1-

Channel 1 Output (-)

Position 1+

Channel 1 Output (+)

Position G

Ground

Position 2-

Channel 2 Output (-)

Position 2+

Channel 2 Output (+)

Position 3-

Channel 3 Output (-)

Position 3+

Channel 3 Output (+)

Position G

Ground

Position 4-

Channel 4 Output (-)

Position 4+

Channel 4 Output (+)

6

BNC Connectors

Unbalanced

Channel 1 Ground

Channel 1 Signal

Channel 2 Ground

Channel 2 Signal

Channel 3 Ground

Channel 3 Signal

Channel 4 Ground

Channel 4 Signal

Unbalanced

Channel 1 Ground

Channel 1 Signal

Channel 2 Ground

Channel 2 Signal

Channel 3 Ground

Channel 3 Signal

Channel 4 Ground

Channel 4 Signal



Indicator LEDs and Alarm Circuitry

The stand-alone box version of the Pure Digital Fiberlink 3440 Series trans-

mission unit has two integral indicator LEDs that are used to monitor the state

of the unit. The status of these LEDs are as follows:

The rack card version of this product has an additional red indicator LED that

lights when an alarm condition exists. The rack card unit also provides an out-

put to drive a model 6020 Alarm Sensing Module which provides an audible

tone and activates a set of contacts for external signaling purposes.

TRANSMITTER and RECEIVER:

Power:

(Green) Indicates that correct power has been applied.

TRANSMITTER:

Link:

OFF:

Indicates no video detected on input BNC and no audio

detected coming into the transmitter unit.

STEADY GREEN:

Indicates video detected on input BNC and no

audio detected into the transmitter unit

ON BLINKING OFF:

Indicates video detected on input BNC and

active audio detected into the transmitter unit.

OFF BLINKING ON:

Indicates no video detected on input BNC

and active audio detected into the transmitter unit.

Alarm:

ON:

Loss of video (rack card only)

RECEIVER:

Link:

OFF:

Indicates no video detected over fiber and, as a result, no

video present on output BNC. No active audio detected to the

receiver unit.

STEADY GREEN:

Indicates video detected over fiber and, as a

result, video present on output BNC. No active audio detected to the

receiver unit.

Receiver indicator conditions continued on next page.

7



ON BLINKING OFF:

Indicates video detected over fiber and, as a

result, video present on output BNC. Active audio detected to the

receiver unit.

OFF BLINKING ON:

Indicates no video detected over fiber and, as

a result, no video present on output BNC. Active audio detected to

the receiver unit.

Alarm:

ON:

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

OPERATING POINTERS AND

TROUBLESHOOTING

OPTICAL FIBER:

The 3440 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 com-

bination.

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

8



can easily block the fiber from accepting or radiating light.

As a result, the key word is cleanliness.

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 any of the LINK indicator LED should pro-

vide the first clue as to the origin of any operation failure. If

this 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. Due to the number of

positions, it is possible that there may be wrong connec-

tions.

Finally, although multimode and single mode devices may

look the same, they will not operate properly together. Us-

ing the wrong device or fiber can easily add more attenua-

tion 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

9



MAINTENANCE

The Pure Digital Fiberlink 3440 Series transmission units have been manufac-

tured using the latest semiconductor devices and techniques 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 encoun-

tered, Communications Specialties maintains a complete service facility to ren-

der 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 trans-

mission 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 that many “problems” can easily be solved by

a simple telephone call.

10



LIMITED WARRANTY

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

after purchase by the Buyer, the Pure Digital Fiberlink 3440 Series Transmission

System will be free from defects in material and workmanship under normal use and

service. A Return Material Authorization (RMA) number must be obtained from CSI

before any equipment is returned 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 damaged by fire, war, acts of God, or

similar causes, or equipment that has been serviced by unauthorized personnel, al-

tered, improperly installed or abused.

RMA numbers and repairs can be obtained from:

Communications Specialties, Inc.

55 Cabot Court

Hauppauge, N.Y. 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 Pte Ltd

100 Beach Road

#22-09 Shaw Tower

Singapore 189702

Tel: +65 6391 8707

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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