Atlas TSD-DA28 User manual

Owner’s Manual
TSD-DA28
2x8 Distribution Amplifier
– 1 –
Specications are subject to change without notice.
TSD-DA28
2x8 Balanced Line
Distribution Amplifier

Owner’s Manual
TSD-DA28
2x8 Distribution Amplifier
– 2 –
Specications are subject to change without notice.
Description
The Atlas Sound TSD-DA28 2x8 distribution amplier is designed to provide clean, isolated signal
distribution locally or to remote locations. The unit allows two independent balanced line level source
inputs to be distributed to eight isolated variable outputs making it a perfect solution for applications
including convention centers, houses of worship, restaurants/sports bars and industrial facilities.
Isolation between outputs prevents crosstalk, removes miss matched input impedance concerns
and allows for adjustable levels on each connected device. All I/O is via Phoenix style connectors for
installation convenience and inputs may be easily paralleled for 1 in / 8 out conguration.
The TSD-DA28 is part of a full line of Atlas Sound Time Saving Devices. These compact (1.5" x 4" x 2.75")
units are designed to solve some of the common audio system problems in the easiest and in the
most efcient and cost-eective way. All models are made from high quality components and include
removable individual I/O connectors for quick and precise wiring, separate ground terminals for all
I/Os assuring secured connections, and removable level controls that can be replaced with
tamper-proof security covers. The TSDs are highly efcient and meet Energy Star™ standards as one
24V DC power supply (available separately) can power multiple Atlas Time Saving Devices.
Features
•Two (2) Balanced Line Inputs
•Eight (8) Isolated Balanced Line Outputs
•Signal & Peak Indicator LEDs For Each
Channel
 • High Gain Output for Driving Long
Balanced Lines
 • SecurityCoversIncludedforAllFront
Panel Controls
 • MultipleMountingCongurations
 • CableManagementSystem
 • SeparateGroundConnections
 • RemovablePhoenixStyleI/OConnectors
 • MeetsEnergyStar™ Standards
 • CompactChassisDesign
Audio Applications
 • LinePreamp
 • LineDrive
 • ZoneDivider
 • Broadcast
Installation
 • Churches
 • Restaurants
 • SportsBars
 • Schools
 • IndustrialFacilities
 • HouseofWorship

Owner’s Manual
TSD-DA28
2x8 Distribution Amplifier
– 3 –
Specications are subject to change without notice.
Front Panel Description
1. Input Level Controls - Adjust the gain of the source audio signal that is applied to the DA28
circuitry. Turn clockwise to increase the signal level and counter-clockwise to decrease it.
Note: The Input Level Control knob can be removed and replaced with a supplied security cover to
prevent unauthorized adjustment.
2. Output Level Controls - Adjust the level of each of the eight outputs using these individual controls.
Turn clockwise to increase the signal level and counter-clockwise to decrease it. Note: The output
level control knobs can be removed and replaced with supplied security covers to prevent
unauthorized adjustment.
3. Power LED - Illuminates Blue when 24VDC is present.
4. Input Peak LED-IlluminatesRedwhentheinputsignalreaches3dBVbelowwhensignalclipping
will occur. Occasional flashing is normal but if this indicator is continuously On, then reduce the
input level using the input level control on the front panel.
5. Signal LED - Illuminates Green when the input signal strength reaches 25mV to verify a signal
path.
6. Bracket Retainer Points - Each TSD includes two mounting brackets for securing the TSD to a
 cabinetorwall.Removescrewsandalignthebracketwiththepanelholebeforermlytightening 
the screws.
3
5
4
1 2
66
6 6

Owner’s Manual
TSD-DA28
2x8 Distribution Amplifier
– 4 –
Specications are subject to change without notice.
Rear Panel Description
TSD Input/Output connections are removable for easy system wiring. The connector has a 3.5mm
pitch between pins.
1. DC Power Input - Each TSD that requires DC power comes with a 2 position connector for
an external 24VDC power supply (sold separately). Because of the TSD’s low power consumption,
a single external power supply may power more than one TSD. Please refer to the specifications
on current requirements in milliamps to match with the appropriate power supply. Note: It is
acceptable to exceed the current requirements of the TSDs but NOT safe to use a power supply
that is below the current requirement of the device.
2. Balanced Line Input - Connects to a balanced line level source. Your connection must be mated
properly to the input connector or signal loss and/or noise may occur. Note: Unbalanced line level
inputs can be inserted with proper wire configuration by connecting the (G) and (-) terminals
together.
3. Balanced Line Output - Connections to provide output when an input signal is present for
connection to balanced line level devices. Your output connections must be connected properly to
the connectors or loss and/or noise may be introduced into the signal. Note: Unbalanced line level
devices can be used with proper wire configuration by connecting the (G) and (-) terminals
together.
4. Cable Management Retainer Points - Each TSD includes two cable retainer straps for securing
 theincludedcablemanagementretainers.Removeoneoftherearpanelscrews,alignthe 
panel hole with a retainer and firmly tighten the screws.
3
1
44
4 4
2 3

Owner’s Manual
TSD-DA28
2x8 Distribution Amplifier
– 5 –
Specications are subject to change without notice.
Knob and Security Cover
All front panel level controls feature a removable knob that can be replaced with an included security
cover. Follow these steps to prevent potentiometer damage or unwanted changes.
1. Knob Installation - Turn the potentiometer shaft fully counter-clockwise. Align the knob indicator
to the lowest setting on the panel and the potentiometer shaft slot. Carefully press the knob onto
the potentiometer shaft. Do not force or damage may occur to the potentiometer.
2. SecurityCoverInstallation–Removetheknobfromthepanelandinsertthecover.Donotforceor
damage may occur to the potentiometer. Small pliers may be required to remove the knobs.
Mounting
There are three ways to securely mount this TSD:
1. Velcro™ - Each unit includes industrial grade Velcro™ with adhesive backing to adhere to any
flat surface.
2. Brackets - Each unit includes two mounting brackets to secure to a cabinet or wall.
3. RackMountPanel-TheoptionalTSD-RMKrackmountpanelsupportsuptofourTSDsina
 1RUspace.

Owner’s Manual
TSD-DA28
2x8 Distribution Amplifier
– 6 –
Specications are subject to change without notice.
Specications
Description
2 x 8 Line Distribution Amplifier
Chassis Color Black
ChassisMaterial Aluminum
Inputs
Type Qty 2, Balanced Line
Connection Removable3PositionCaptiveScrew3.5mmSpacing
Impedance 10KΩBalanced, 5KΩUnbalanced
Line Input Level 1V (0dBV) Balanced = 2V (+6dBV) Balanced Output,
 MaximumInput6V(15dBV)
Outputs
Type Qty 8, Balanced
Connection Removable3PositionCaptiveScrew3.5mmSpacing
Impedance 300ΩBalanced, 150ΩUnbalanced
LineOutputLevel 1V(0dBV)In=2V(+6dBV)Balanced,MaximumOutput6V(15dBV)
Block Diagram
G
–
+
OUTPUT 1
G
–
+
INPUT 1
G
–
+
INPUT 2
OUTPUT 1 LEVEL
ON FRONT PANEL
INPUT 1 LEVEL
ON FRONT PANEL
INPUT 1 LEVEL
ON FRONT PANEL
G
–
+
OUTPUT 2
OUTPUT 2 LEVEL
ON FRONT PANEL
G
–
+
OUTPUT 3
OUTPUT 3 LEVEL
ON FRONT PANEL
G
–
+
OUTPUT 4
OUTPUT 4 LEVEL
ON FRONT PANEL
G
–
+
OUTPUT 5
OUTPUT 5 LEVEL
ON FRONT PANEL
G
–
+
OUTPUT 6
OUTPUT 6 LEVEL
ON FRONT PANEL
G
–
+
OUTPUT 7
OUTPUT 7 LEVEL
ON FRONT PANEL
G
–
+
OUTPUT 8
OUTPUT 8 LEVEL
ON FRONT PANEL
PEAKSIGNAL
PEAKSIGNAL
DC 24V
24V
POWER SHOW
LED

Owner’s Manual
TSD-DA28
2x8 Distribution Amplifier
– 7 –
Specications are subject to change without notice.
Controls
InputLevelControl Qty2,RemovableKnobswithSecurityCovers
OutputLevelControl Qty8,RemovableKnobswithSecurityCovers
Indicators
Input Signal Green, 25mV On Threshold
InputPeak Red,-3dBBeforeClip
Power Blue
Electrical
FrequencyResponse 20Hz-20kHz(±1dB)
THD .06% & 1kHz
Signal to Noise 90dB
Mounting
Velcro™ Industrial Grade, Included
Brackets Qty 2, Included
TSD-RMK Optional1RURackMountPanel(Supports4TSDUnits)
CableRetainer Qty2,Included
Power Requirements
Voltage 24VDC
Power Consumption 80mA
PowerConsumption 1.92W
Dimensions H1.5"(39mm)xW4"(101mm)xD2.75"(70mm)
Weight 6oz,.165kg
Accessories
TSD 24VDC Power Supplies
TSD-RMK1RURackPanel
Safety and Certifications
ExternalPowerSupply cUL,CE,RoHS,TUV

Owner’s Manual
TSD-DA28
2x8 Distribution Amplifier
– 8 –
Specications are subject to change without notice.
Limited Warranty
All products manufactured by Atlas Sound are warranted to the original dealer/installer, industrial or
commercial purchaser to be free from defects in material and workmanship and to be in compliance
with our published specications, if any. This warranty shall extend from the date of purchase for
aperiodofthreeyearsonallAtlasSoundproducts,includingSOUNDOLIERbrand,andATLAS
SOUND brand products except as follows: one year on electronics and control systems; one year on
replacementparts;andoneyearonMusicianSeriesstandsandrelatedaccessories.Additionally,
fuses and lamps carry no warranty. Atlas Sound will solely at its discretion, replace at no charge or
repair free of charge defective parts or products when the product has been applied and used in
accordancewithourpublishedoperationandinstallationinstructions.Wewillnotberesponsible
for defects caused by improper storage, misuse (including failure to provide reasonable and
necessary maintenance), accident, abnormal atmospheres, water immersion, lightning discharge,
or malfunctions when products have been modified or operated in excess of rated power, altered,
serviced or installed in other than a workman like manner. The original sales invoice should be
retained as evidence of purchase under the terms of this warranty. All warranty returns must comply
withourreturnspolicysetforthbelow.WhenproductsreturnedtoAtlasSounddonotqualifyfor
repair or replacement under our warranty, repairs may be performed at prevailing costs for material
and labor unless there is included with the returned product(s) a written request for an estimate
of repair costs before any nonwarranty work is performed. In the event of replacement or upon
completion of repairs, return shipment will be made with the transportation charges collect.
EXCEPTTOTHEEXTENTTHATAPPLICABLELAWPREVENTSTHELIMITATIONOFCONSEQUENTIAL
DAMAGESFORPERSONALINJURY,ATLASSOUNDSHALLNOTBELIABLEINTORTORCONTRACT
FORANYDIRECT,CONSEQUENTIALORINCIDENTALLOSSORDAMAGEARISINGOUTOFTHE
INSTALLATION,USEORINABILITYTOUSETHEPRODUCTS.THEABOVEWARRANTYISINLIEUOF
ALLOTHERWARRANTIESINCLUDINGBUTNOTLIMITEDTOWARRANTIESOFMERCHANTABILITY
ANDFITNESSFORAPARTICULARPURPOSE.
Atlas Sound does not assume, or does it authorize any other person to assume or extend on its
behalf, any other warranty, obligation, or liability. This warranty gives you specic legal rights and
you may have other rights which vary from state to state.