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B LENDING H IGH F IDELITY AND A RCHITECTURE
®
AVDA-3
Audio/Video Distribution Amplifier
Niles Audio Corporation
www.nilesaudio.com
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-
nical and other specifications of Niles products. Additional information can be obtained on-line at www.nilesaudio.com or by
calling Niles at 1-800-289-4434. Printed in USA 10/99 DS00256A
AUDIO
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
Video Bandwidth . . . . . . . . . . . . . . . . . .DC to 7MHz
Maximum Input Signal . . . . . . . .2 volts peak to peak
Input Impedance . . . . . . . . . . . . . . . . . . . . .75 ohms
Output Impedance . . . . . . . . . . . . . . . . . . .75 ohms
Output Gain . . . . . . . . . . . . . . . . . . . . . . . . . .UNITY
Power Requirements . . . . . . . . . . . . .15 VAC 500 mA
ESD Protection . . . . . . . . .meets IEC 1000-4-2 level 4
Dimensions . . . . . . . . . . . . . . .6.81" x 3.875" x 1.35"
SPECIFICATIONS
TROUBLESHOOTING
1. LED Power indicator is not illuminated:
Make sure the 15V AC power supply
(included) is plugged into a “live” 120 V
outlet. Also, check to make sure that the
15V AC power supply’s plug is seated cor-
rectly in the power jack of the AVDA-3. If
the LED still fails to illuminate, use a volt-
meter to measure the 15V AC plug and
verify proper voltage. Replace the adapter
if necessary. If voltage is correct, replace
the AVDA-3.
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.
3. Audio signal exhibits an audible low fre-
quency hum: Hum is most commonly
caused by what is termed a "ground loop".
Ground loops cause a constant and audible
60 Hz hum on the audio signal. This prob-
lem occurs when the ground potential of a
particular connected component in the
system differs from that of any other con-
nected component. It is most commonly
caused by incoming Cable TV feeds or con-
nected components powered by separate
AC power circuits. Correcting the ground
potential difference at its source is always
the best (but not always the easiest) way to
correct a ground loop. Using signal isola-
tion transformers offers an easier (but per-
haps more costly solution) to this problem.
4. Picture has horizontal bar that moves up
or down vertically: This is the effect a
ground loop has on a video signal. See
Troubleshooting #3 for details on ground
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
components, especially if they are longer
than 15 ft. Verify proper connection and
operation of cables and, if necessary,
bench test the AVDA-3 with short cables to
verify normal operation. Replace any long
runs of cable causing signal loss with
upgraded cable.
INTRODUCTION
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.
FEATURES AND BENEFITS
■
IC operational amplifiers for clear, stable video images and smooth, accurate sound.
■
Gold plated RCA connectors for reliable performance.
■
Audio/video cascade outputs feature with automatic video impedance matching for
simple system expansion and optimal picture quality.
■
Space saving, inline power adapter for cleaner installations.
■
Ideal for residential and commercial installations.
■
100% factory tested.
■
Limited two year parts and labor warranty.
■
Proudly made in the U.S.A.
INSTALLATION & OPERATION GUIDE