ATI Technologies ADA206XLR Instrucciones de funcionamiento

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DISTRIBUTION AMPLIFIERS

OPERATING AND MAINTENANCE MANUAL

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DaySequerra 7209 Browing Road Pennsauken, NJ 08109 [email protected] www.atiaudio.com

PRODUCT DESCRIPTION

The ADA206XLR, ADA208XLR and ADA412XLR Analog Audio Distribution Amplifiers provide

two (206) or four (412) 1X3 distribution amplifier channels, and two (208) 1x4 distribution

amplifier channels, with balanced inputs and outputs. A master, gain adjustment for each

channel controls all three outputs together to adjust for varying inputs, while individual trimmers

for each output allow adjustment over a 20dB range to accommodate 10dbu semi-pro up to

+8dBm line levels.

Another of the ADA206XLR, ADA208XLR and ADA412XLR Distribution Amplifiers many

claims to fame is the use of XLR type input and output connectors. XLRs are easy to use but

make paralleling inputs for 1X6 or 1X12 operation difficult.

An LF347N quad bi-fet opamp forms the three variable gain output adjustment stages. These

variable gain stages use a unique circuit arrangement that allows us to provide a smooth,

logarithmic gain control for each output using an inexpensive (but good) linear cermet

potentiometer. Since we actually reduce the stage gain for low outputs rather than taking the

more conventional approach of reducing the input level to a fixed gain amplifier, you can use

the ADA at low output levels with very little noise penalty. You can use the ADA to match

consolemedium level inputs (-20dBu) or to drive semi-pro IHF inputs without requiring

outboard attenuator pads.

SSM2142 active balanced output drivers sense the voltage on their high and low output lines

and will shut off drive to a grounded output line while doubling the drive on the other. This

capability allows you to connect the outputs to balanced or unbalanced loads without regard

to whether or which side of the output is grounded. Maximum output at clipping is +22dBm into

balanced loads; however, even though the gain is the same under either condition, clipping

output is reduced by 6dB when driving an unbalanced load since the full output swing capability

of only one driver of the two is available.

The ADA family operates from a 15W – 24VDC single output switching supply featuring

universal AC input. Operating in the range of 85 – 264 VAC / 120 – 370 VDC, it offers low ripple

and noise at a max 150mV peak to peak.

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INSTALLATION

The ADA is designed for rack mounting on standard EIA 1-3/4 inch centers. Each unit

dissipates approximately 10 watts and is designed for use in an office environment. Avoid

excessive heat buildup (such as might be due to nearby power amplifiers in unventilated racks)

to ensure maximum component life.

AUDIO CONNECTIONS

XLR inputs and outputs are wired with pins 2 as HI and pins 3 as LOW. Pin 1 (shield) of all

input and output connectors are permanently grounded in accordance with current AES

recommendations. The pin 1 grounds are routed via a large, low impedance ground path

directly to the chassis separately from any audio ground paths. Internal circuit ground is also

connected to the chassis for shielding through an independent path. AC ground (green wire) is

also separately grounded to the chassis. Active balanced outputs require a reference ground

connection to the receiving device for proper operation. This ground is carried through pin 1.

If the pin 1 shield ground is not carried through to the receiving device, the AC ground, rack

frame, or studio ground system may complete this ground. Noisy grounds require excellent

common mode rejection in the receiving device for quiet system operation.

We have taken measures to keep RFI out of your ADA, including split and bypassed input

networks, beaded, bypassed and isolated power inputs, nonconcentric wound, semi-toroidal

power transformers, double ground plane PC boards and a nice enclosure to keep rain and

snow off the circuit boards. However, in difficult broadcast applications, the RF shielding and

suppression system can be no better than the ground system into which it is trying to dump the

unwanted RF. For optimal product performance, be sure to have a good grounding system.

ADJUSTMENTS

The Master and individual Output level controls should all be set close to 2 o’clock to provide

nominal +4dBm outputs for a nominal +4dBu input. These settings allow +6/-16dB output

adjustment range around nominal, which will allow outputs of +10 to -12dBm to be set. In

addition, the Master gain has +10dB to OFF adjustment range to compensate for input level

variations from -6dBu to input clipping at +24dBu.

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115VAC & 230VAC OPERATION

The ADA is ready for 115 VAC or 230 VAC. A single output switching power supply offers

protections from short circuit, overload, and over voltage while capable of accepting VAC in

the range of 85 – 264 VAC.

UL LISTING

The ADA206XLR, ADA208XLR and ADA412XLR are listed by Underwriter Laboratories as

“Listed Professional Audio Equipment 2D65.”

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PRODUCT SPECIFICATIONS

OUTPUT LEVEL: +22dBm peak into 600 ohm balanced load, +18dBm peak, typical, into

unbalanced loads

DISTORTION: THD .10% maximum, 20 to 20,000Hz at peak output, IMD .05% maximum,

SMPTE measurement

SLEW RATE: 13 Volts per microsecond

RESPONSE: ± .25dB, 20 to 20,000Hz

NOISE: -95dBm out at maximum gain, 20kHz bandwidth

GAIN: 40dB maximum

CROSSTALK: 70dB minimum at 10kHz, any path

OUTPUT ISOLATION: 70 dB minimum at 1kHz. A shorted output does not affect any

other output.

OUTPUTS: Active balanced, servo controlled, ground sensing, 50 Ohm output impedance,

DC coupled. XLR type male connectors, Pin 2-HI, 3-LO, 1-GND.

INPUTS: 20Kohm active balanced, split and RF bypassed. +22dBm maximum input level,

60dB CMR at 60Hz. XLR type female connectors, Pin 2-HI, 3-LO, 1-GND.

POWER: 85-264 VAC ±1%, Output Voltage 24 VDC, Ouput Power 15 W, 47 - 63Hz

frequency range.

SIZE: 19” (48.3cm) W X 1.75” (4.45cm) H X 7.5” (19cm) D

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SHIPPING WEIGHT & DIMENSION: 12 lbs. (5.5kg), 22”x12”x5”

MODELS AVAILABLE: ADA206XLR Dual 1X3 Active balanced outputs, ADA412XLR Quad

1X3 Active balanced outputs, ADA208XLR Dual 1X4 Active balanced outputs

ADA206XLR

ADA208XLR

ADA412XLR

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ONE YEAR LIMITED WARRANTY

ATI warrants this product to be free from defects in materials and workmanship to its original

owner for a period of one year from date of purchase. ATI will repair or replace such product

or part thereof, which upon inspection by ATI, is found to be defective in materials or

workmanship.

The Proper Return Authorization Number must be obtained from ATI in advance of return.

Contact ATI at 856-719-9900 or email [email protected] to receive the number and

instructions for return of your unit.

A written statement providing the name, address, daytime telephone number and email address

of the original owner, together with receipt from the original purchase, and a brief description

of any claimed defects, must accompany all returns. Parts or product for which replacement is

made shall become the property of ATI.

The customer shall be responsible for costs of transportation and insurance to the factory of

ATI, and shall be required to prepay such costs.

ATI shall use reasonable efforts to repair or replace any product covered by this limited

warranty within thirty days of receipt. In the event repair or replacement shall require more than

thirty days, ATI shall notify the customer accordingly. ATI reserves the right to replace any

product that has been discontinued from its product line with a new product of comparable

value and function.

This warranty shall be void in the event a covered product has been damaged, or failure is

caused by or attributable to acts of God, abuse, accident, misuse, improper or abnormal usage,

failure to follow instructions, improper installation or maintenance, alteration, or lightning, power

fluctuations and other incidental or environmental conditions. Further, product malfunction or

deterioration due to normal wear is not covered by this warranty.

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ATI DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WHETHER OF

MERCHANTABILITY OF FITNESS FOR A PARTICULAR USE, EXCEPT AS EXPRESSLY

SET FORTH HEREIN. THE SOLE OBLIGATION OF ATI UNDER THIS LIMITED WARRANTY

SHALL BE TO REPAIR OR REPLACE THE COVERED PRODUCT, IN ACCORDANCE WITH

THE TERMS SET FORTH HEREIN. ATI EXPRESSLY DISCLAIMS ANY LOST PROFITS,

GENERAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES WHICH MAY RESULT

FROM BREACH OF ANY WARRANTY, OR ARISING OUT OF THE USE OR INABILITY TO

USE ANY ATI PRODUCT.

Some states do not allow the exclusion or limitation of incidental or consequential damages or

limitation on how long an implied warranty lasts, so the above limitations and exclusions may

not apply to you.

This warranty gives you specific legal rights, and you may also have other rights that vary from

state to state.

ATI reserves the right to modify or discontinue, without prior notice to you, any model or style

product.

If warranty problems arise, or if you need assistance in using your product please contact us.

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