Datavideo DAC-80 Users Manual

AUDIO ISOLATION
TRANSFORMER

DAC-80

Instruction Manual

www.datavideo.com

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Table of Contents

FCC COMPLIANCE STATEMENT ................................................ 3

WARNINGS AND PRECAUTIONS .............................................. 3

WARRANTY ............................................................................. 5

STANDARD WARRANTY ................................................................. 5

THREE YEAR WARRANTY ............................................................... 5

DISPOSAL ................................................................................ 6

1. INTRODUCTION ............................................................... 7

FEATURES ................................................................................... 7

SYSTEM DIAGRAM ........................................................................ 8

2. CONNECTIONS & CONTROLS ............................................ 9

FRONT PANEL .............................................................................. 9

REAR PANEL .............................................................................. 10

3. ELECTRONIC CIRCUIT DIAGRAM ..................................... 11

4. SPECIFICATIONS ............................................................. 11

SERVICE & SUPPORT .............................................................. 12

Disclaimer of Product and Services

The information offered i n this instruction manua l is intended as a guide on ly. At all times, Datav ideo
Technologies w ill try to give c orrect, complet e and suitable information. However, Datav ideo Technologie s
cannot exclude that some information in this manual, from time to time, may not be correct or may be
incomplete. This manual may co ntain typing e rrors, omissions or incorrect information. Da tavideo
Technologies a lways recommend that you double check t he information in t his document for ac curacy
before making any p urchase decision or using the product. Datavideo Technologies is not respons ible for
any omissions or errors , or for any subseque nt loss or damage caus ed by using the in formation contained
within this manual. Further advice on the content of th is manual or on the product can be obtained by

contacting you r local Datavideo Office or dealer.

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FCC Compliance Statement

This device complies with part 15 of the FCC rules. Operation is subject to the
following two conditions:

(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference

that may cause undesired operation.

Warnings and Precautions

1. Read all of these warnings and save them for later reference.

2. Follow all warnings and instructions marked on this unit.

3. Unplug this unit from the wall outlet before cleaning. Do not use liquid or

aerosol cleaners. Use a damp cloth for cleaning.

4. Do not use this unit in or near water.

5. Do not place this unit on an unstable cart, stand, or table. The unit may

fall, causing serious damage.

6. Slots and openings on the cabinet top, back, and bottom are provided for

ventilation. To ensure safe and reliable operation of this unit, and to
protect it from overheating, do not block or cover these openings. Do not
place this unit on a bed, sofa, rug, or similar surface, as the ventilation
openings on the bottom of the cabinet will be blocked. This unit should
never be placed near or over a heat register or radiator. This unit should
not be placed in a built-in installation unless proper ventilation is
provided.

7. This product should only be operated from the type of power source

indicated on the marking label of the AC adapter. If you are not sure of the
type of power available, consult your Datavideo dealer or your local power
company.

8. Do not allow anything to rest on the power cord. Do not locate this unit

where the power cord will be walked on, rolled over, or otherwise
stressed.

9. If an extension cord must be used with this unit, make sure that the total

of the ampere ratings on the products plugged into the extension cord do
not exceed the extension cord rating.

10. Make sure that the total amperes of all the units that are plugged into a

single wall outlet do not exceed 15 amperes.

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11. Never push objects of any kind into this unit through the cabinet

ventilation slots, as they may touch dangerous voltage points or short out
parts that could result in risk of fire or electric shock. Never spill liquid of
any kind onto or into this unit.

12. Except as specifically explained elsewhere in this manual, do not attempt

to service this product yourself. Opening or removing covers that are
marked “Do Not Remove” may expose you to dangerous voltage points or
other risks, and will void your warranty. Refer all service issues to qualified
service personnel.

13. Unplug this product from the wall outlet and refer to qualified service

personnel under the following conditions:

a. When the power cord is damaged or frayed;
b. When liquid has spilled into the unit;
c. When the product has been exposed to rain or water;
d. When the product does not operate normally under normal operating

conditions. Adjust only those controls that are covered by the operating
instructions in this manual; improper adjustment of other controls may
result in damage to the unit and may often require extensive work by a
qualified technician to restore the unit to normal operation;

e. When the product has been dropped or the cabinet has been damaged;
f. When the product exhibits a distinct change in performance, indicating

a need for service.

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Warranty

Standard Warranty

• Datavideo equipment are guaranteed against any manufacturing defects for

one year from the date of purchase.

• The original purchase invoice or other documentary evidence should be

supplied at the time of any request for repair under warranty.

• The product warranty period beings on the purchase date. If the purchase

date is unknown, the product warranty period begins on the thirtieth day
after shipment from a Datavideo office.

• Damage caused by accident, misuse, unauthorized repairs, sand, grit or

water is not covered under warranty.

• Viruses and malware infections on the computer systems are not covered

under warranty.

• Any errors that are caused by unauthorized third-party software

installations, which are not required by our computer systems, are not
covered under warranty.

• All mail or transportation costs including insurance are at the expense of

the owner.

• All other claims of any nature are not covered.

• Cables and batteries are not covered under warranty.

• Warranty only valid in the country or region of purchase.

• Your statutory rights are not affected.

Three Year Warranty

• All Datavideo products purchased after July 1st, 2017 are

qualified for a free two years extension to the standard
warranty, providing the product is registered with
Datavideo within 30 days of purchase.

• Certain parts with limited lifetime expectancy such as LCD panels, DVD

drives, Hard Drive, Solid State Drive, SD Card, USB Thumb Drive, Lighting,
Camera module, PCIe Card are covered for 1 year.

• The three-year warranty must be registered on Datavideo's official website

or with your local Datavideo office or one of its authorized distributors
within 30 days of purchase.

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Disposal

For EU Customers only - WEEE Marking

This symbol on the product indicates that it will not be
treated as household waste. It must be handed over to
the applicable take back scheme for the recycling of
Waste Electrical and Electronic Equipment. For more
detailed information about the recycling of this product,
please contact your local Datavideo office.

CE Marking is the symbol as shown on the left of this page.
The letters "CE" are the abbreviation of French phrase
"Conformité Européene" which literally means "European
Conformity". The term initially used was "EC Mark" and it
was officially replaced by "CE Marking" in the Directive

93/68/EEC in 1993. "CE Marking" is now used in all EU official documents.

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1. Introduction

DAC-80 is designed to remove hum and buzz created by ground loops. Normal

voltage differences in the system grounding points between different pieces of

equipment cause small AC power currents to flow in the shield of audio cables.

Capacitance between a power transformer’s primary and secondary windings

introduce signals to the circuit ground which will also create small current flows

in the cable shield. Either of these problems will create hum in audio signals.

DAC-80 breaks the inter-equipment ground path and greatly increases the

rejection in the input circuits while remaining transparent to the audio signal.

Features

• Easy to use

• Eliminate audio noise caused by ground loops

• Designed for low signal loss and low distortion

• Passive device (No power required)

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System Diagram

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2. Connections & Controls

CH1 / CH2 Audio Input

LIFT Toggle Switch

These switches turn to DOWN position, for
chassis shield and audio ground connected.

(Left switch =CH2, Right switch = CH1)

Front Panel

XLR Balanced Audio input (Channel 1 / 2)

These switches turn to UP position, audio ground
not connected. Breaks ground loops, provides
audio isolation.

Corrects balance on audio lines.

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CH1 /CH2 Audio Output

Rear Panel

XLR Balanced Audio output (Channel 1/ 2).

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3. Electronic Circuit Diagram

4. Specifications

Impedance 600Ω+/- 10%(Input & output)

Bandwidth Frequency 20Hz ~20KHz ±0.5dB

THD: 1 KHz < 0.015% @ +4dBu; 20Hz: 0.05% @+4dBu

Insertion loss <0.5dB

Turns Ratio 1:1

Input 2 XLR Audio Input Channels

Output 2 XLR Audio Output Channels

Dimensions 85mm x 45.2mm x 111.5mm (W x H x D)

Service & Support

DATAVIDEO WORLDWIDE OFFICES

It is our goal to make your products ownership a satisfying experience. Our

supporting sta󰀨 is available to assist you in setting up and operating your

system. Please refer to our web site www.datavideo.com for answers to

common questions, support requests or contact your local o󰀩ce below.

China Shanghai

Datavideo Technologies China Co
601,Building 10,No.1228,
Rd.Jiangchang,
Jingan District,Shanghai
Tel: [phone]
Fax:[phone]
E-mail:[email protected]

China Beijing

Datavideo Technologies China Co
No. 812, Building B, Wankai Center,
No.316, Wan Feng Road, Fengtai District,
Beijing, China
Tel: [phone]
Fax:[phone]
E-mail:[email protected]

China Chengdu

Datavideo Technologies China Co
B-823,Meinian square,No.1388,
Middle of Tianfu Avenue,Gaoxin District,
Chengdu,Sichuan
Tel: [phone]
Fax:[phone]
E-mail:[email protected]

China Fuzhou

Datavideo Technologies China Co
A1-2318-19 Room,No.8, Aojiang Road,
Taijiang District,Fuzhou,Fujian,China

Tel: [phone]
Fax:[phone]
E-mail:[email protected]

China Jinan

Datavideo Technologies China Co

902, No. 1 business building,
Xiangtai Square, No. 129,
Yingxiongshan Road, Shizhong District,
Jinan City, Shandong Province, China

Tel: [phone]
E-mail:[email protected]

Hong Kong

Datavideo Hong Kong Ltd

G/F.,26 Cross Lane
Wanchai, Hong Kong

Tel: [phone]
Fax:[phone]
E-mail:info@dat avideo.com.hk

India Noida

Datavideo India Noida
A-132, Sec-63,Noida-201307,
India

Tel: [phone]
Fax:[phone]
E-mail: [email protected]

India Kochi

Datavideo India Kochi

2nd Floor- North Wing, Govardhan Building,
Opp. NCC Group Headquaters, Chittoor Road,
Cochin- 682035

Tel: [phone]
Fax:[phone]

Netherlands

Datavideo Technologies Europe B V
Floridadreef 106
3565 AM Utrec ht,
The Netherlands
Tel: [phone]
Fax: [phone]
E-mail:info@dat avideo.n l

Singapore

Datavideo Visual Technology(S) Pte Ltd
No. 178 Paya Lebar Road #06-07
Singapore 409030

Tel: [phone]
Fax:[phone]
E-mail:[email protected]

Please visit our website for latest manual update.
www.datavideo.com/product/DAC-80

Singapore

Datavideo Technologies (S ) PTE Ltd
No. 178 Paya Lebar Road #06-03
Singapore 409030

Tel: [phone]
Fax:[phone]
E-mail:sales@dat avideo.sg

Taiwan

Datavideo Technologies Co. Ltd
10F. No. 176, Jian 1st Rd.,Chung Ho
District, New Taipei City 235, Taiwan

Tel: [phone]
Fax:[phone]
E-mail:[email protected]

United States

Datavideo Corporation
7048 Elmer Avenue.
Whittier, CA 90602,
U.S.A.
Tel: [phone]
Fax:[phone]
E-mail:[email protected]E-mail: [email protected]

United Kingdom

Datavideo U K Limite d
Brookfield House, Brookfield Industrial
Estate, Peakdale Road, Glossop,
Derbyshire, SK13 6LQ
Tel: [phone]
Fax: [phone]
E-mail:sales@dat avideo.co.uk

France

Datavideo France s.a.r.l.
Cité Descartes 1, rue Albert Einstein
Champs sur Marne 774477 –
Marne la Vallée cedex 2
Tel: [phone]
Fax: [phone]
E-mail:[email protected]

All the trademarks are the properties of their respective owners.
Datavideo Technologies Co., Ltd. All rights reserved 2018

Jul-07.2017