TROUBLESHOOTING
nected component. It is most commonly
caused by incoming Cable TV feeds or con-
I N S T A L L A T I O N & O P E R AT I O N G U I D E
1. LED Power indicator is not illuminated: nected components powered by separate
Make sure the 15V AC power supply AC power circuits. Correcting the ground
(included) is plugged into a “live” 120 V potential difference at its source is always
outlet. Also, check to make sure that the the best (but not always the easiest) way to
15V AC power supply’s plug is seated cor- correct a ground loop. Using signal isola-
rectly in the power jack of the AVDA-3. If tion transformers offers an easier (but per-
the LED still fails to illuminate, use a volt- haps more costly solution) to this problem.
AVDA-3
Audio/Video Distribution Amplifier
meter to measure the 15V AC plug and
verify proper voltage. Replace the adapter
4. Picture has horizontal bar that moves up
or down vertically: This is the effect a
if necessary. If voltage is correct, replace
ground loop has on a video signal. See
the AVDA-3.
Troubleshooting #3 for details on ground
2. LED power indicator is illuminated but
there is no picture or sound: Verify proper
connection of input and output cables.
Test the source component for proper
operation.
loops.
5. Picture and/or sound quality is distorted
or dim compared to the original source sig-
nal: This is most likely due to signal loss on
the audio or video cables connecting the
3. Audio signal exhibits an audible low fre- components, especially if they are longer
quency hum: Hum is most commonly than 15 ft. Verify proper connection and
caused by what is termed a "ground loop". operation of cables and, if necessary,
Ground loops cause a constant and audible bench test the AVDA-3 with short cables to
60 Hz hum on the audio signal. This prob- verify normal operation. Replace any long
lem occurs when the ground potential of a runs of cable causing signal loss with
particular connected component in the upgraded cable.
INTRODUCTION
system differs from that of any other con-
The Niles AVDA-3 is a source-level audio and base-band video distribution amplifier. It
incorporates an audio input (right and left) and a video input, which are actively distrib-
uted to three audio/video outputs. It is especially useful when connecting an audio/video
source component to multiple zone amplifiers and/or RF modulators.
SPECIFICATIONS
AUDIO
VIDEO
Input impedance . . . . . . . . . . . . . . . . . . . . . . . .100K
Output Impedance . . . . . . . . . . . . . . . . . .100 ohms
Frequency Response . . . . . . .flat from DC to >20KHz
Signal to Noise Ratio . . . . . . .>80 dB reference 1 volt
Crosstalk . . . . . . . . . . . . . . . . . . . . .070 dB at 1 KHz
Total Harmonic Distortion . .0.003% 20Hz to 20 KHz
Maximum Signal Input . . . . . . . . . . . . . .6 Volts RMS
Output Gain . . . . . . . . . . . . . . . . . . . . . . . . . .UNITY
Video Bandwidth . . . . . . . . . . . . . . . . . .DC to 7MHz
Maximum Input Signal . . . . . . . .2 volts peak to peak
Input Impedance . . . . . . . . . . . . . . . . . . . . .75 ohms
Output Impedance . . . . . . . . . . . . . . . . . . .75 ohms
Output Gain . . . . . . . . . . . . . . . . . . . . . . . . . .UNITY
FEATURES AND BENEFITS
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IC operational amplifiers for clear, stable video images and smooth, accurate sound.
Power Requirements . . . . . . . . . . . . .15 VAC 500 mA
ESD Protection . . . . . . . . .meets IEC 1000-4-2 level 4
Dimensions . . . . . . . . . . . . . . .6.81" x 3.875" x 1.35"
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Gold plated RCA connectors for reliable performance.
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Audio/video cascade outputs feature with automatic video impedance matching for
simple system expansion and optimal picture quality.
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Space saving, inline power adapter for cleaner installations.
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Ideal for residential and commercial installations.
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100% factory tested.
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Limited two year parts and labor warranty.
Proudly made in the U.S.A.
Niles Audio Corporation
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12331 S.W. 130 Street Miami, Florida, 33186 Tel: (305) 238-4373 Fax: (305) 238-0185
©1999 Niles Audio Corporation. All rights reserved. Niles, the Niles logo and Blending High Fidelity and Architecture are reg-
istered trademarks of Niles Audio Corporation. Because we strive to improve our products, Niles reserves the right to change
product specifications without notice. The technical and other information contained herein is not intended to set forth all tech-
calling Niles at 1-800-289-4434. Printed in USA 10/99 DS00256A
®
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