Data Video DAC-80 User manual

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Table of Contents
FCC COMPLIANCE STATEMENT ............................................... 3
WARNINGS AND PRECAUTIONS..............................................3
WARRANTY............................................................................ 4
STANDARD WARRANTY ................................................................. 4
TWO YEAR WARRANTY ................................................................. 5
DISPOSAL............................................................................... 5
1. INTRODUCTION ..............................................................6
FEATURES ................................................................................... 6
SYSTEM DIAGRAM........................................................................ 7
2. CONNECTIONS & CONTROLS...........................................8
FRONT PANEL.............................................................................. 8
REAR PANEL................................................................................ 9
3. ELECTRONIC CIRCUIT DIAGRAM .................................... 10
4. SPECIFICATIONS............................................................ 10
SERVICE & SUPPORT ............................................................ 11
Disclaimer of Product and Services
The information offered in this instruction manual is intended as a guide only. At all times, Datavideo
Technologies will try to give correct, complete and suitable information. However, Datavideo Technologies
cannot exclude that some information in this manual, from time to time, may not be correct or may be
incomplete. This manual may contain typing errors, omissions or incorrect information. Datavideo
Technologies always recommend that you double check the information in this document for accuracy
before making any purchase decision or using the product. Datavideo Technologies is not responsible for
any omissions or errors, or for any subsequent loss or damage caused by using the information contained
within this manual. Further advice on the content of this manual or on the product can be obtained by
contacting your 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.
Warranty
Standard Warranty
•Datavideo equipment is 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.
•Damage caused by accident, misuse, unauthorized repairs, sand, grit or
water is not covered by this 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 & batteries are not covered under warranty.

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•Warranty only valid within the country or region of purchase.
•Your statutory rights are not affected.
Two Year Warranty
•All Datavideo products purchased after 01-Oct.-2008
qualify for a free one year extension to the standard
Warranty, providing the product is registered with
Datavideo within 30 days of purchase. For
information on how to register please visit www.datavideo.com or contact
your local Datavideo office or authorized Distributors
•Certain parts with limited lifetime expectancy such as LCD Panels, DVD
Drives, Hard Drives are only covered for the first 10,000 hours, or 1 year
(whichever comes first).
Any second year warranty claims must be made to your local Datavideo office
or one of its authorized Distributors before the extended warranty expires.
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
Front Panel
CH1 / CH2 Audio Input
XLR Balanced Audio input (Channel 1 / 2)
LIFT Toggle Switch
These switches turn to UP position, audio ground
not connected. Breaks ground loops, provides
audio isolation.
These switches turn to DOWN position, for
chassis shield and audio ground connected.
Corrects balance on audio lines.
(Left switch =CH2, Right switch = CH1)

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Rear Panel
CH1 /CH2 Audio Output
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)

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Service & Support