Dbx 363X Service Manual

Page 1

MODEL 363x.

SERVICE MANUAL
(Preliminary)

®

Page 2

CAUTION AVIS

RISQUE DE CHOC
RISK OF ELECTRIC SHOCK ELECTRIOUE

9° N" °PEN NE PAS ouvnin
Do NOT EXPOSE TO RAIN on MOISTURE

CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER (0R BACK).
NO USER SEFlVlCEAELE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS APPLIANCE TO
RAIN OR MOISTURE.

This symbol. wherever it appears, This symbol, wherever it appears,
alerts you to the presence ol'uninsulated alerts you to important operating
dangerous voltage inside the enclosure -- Voltage and maintenance instructions in
7 that my: bi sufficient to emintuw a risk of shock. the accompanying literature.
Read the manual

Manufactured under one or more of the following US. patents: 3.377.792; 3.681.618; 3,714,462; 3.789.143;
4,097,767; 4,329,598; 4,403,199: 4,409,500: 4.425.551: 4,473,795. Other patents pending.

This dbx-branded product ha been manufactured by AKG Acoustics, Inc.

AKG is a registered trademark of Akustiche ul Kino-Gerate Ges m.b.H., Austria.
All trademarks are property of their respective companies

This manual is part number 96015-00002
© Copyright 1993 by AKG Acoustics, Inc. . 75 - FB - 1/93

dbx Professional Products
a division of AKG Acoustics, Inc.

x 1525 Alvarado Street. San Leandro. CA 94577 USA
Telephone (1) 510/351~3500 Fax: (1) 510/351-0500

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l2

Connecting The 363x To Your System

Studio Applications
Analog
tops monitor
output:
,f (lawman
@2035? \\E 35'er
L @ @
Stereo 0 D 0 Two track
Coupled recorder
Figure 8: Multi Channel Connections
The 363x can be set for 2-channel stereo opera- between the mix outputs of the console and the
tion by pressing the STEREO COUPLE button. inputs of the 2-track mixdown machine. The
This will force Channel 2 (SLAVE) to track threshold of the 363x is set low enough to gate
Channel 1 (MASTER) to preserve proper stereo out the hiss from the multi-track but open at
imaging. the presence of a signal. This is an effective

Channel 1 controls will adjust the amount and

means of achieving automation muting with
consoles not equipped with this feature.

nature of the gating and Channel 2 will track ac-

curately. .

In Figure 8 the 363x is switched to the stereo
couple mode and inserted into the signal path

The 363Xs two channels operate completely in-
dependently when the STEREO COUPLE but-
. ton is not depressed. '

Page 16

Basic Operorion (Control Descriptions) dbx 363x

. l l
A. THRESHOLD control: l
The Threshold control sets the level at Which
the gate will open and allow the signal :at the in-
put to pass through to the output. The $63X has
an SOdB threshold range which will all0w it to
be used with a variety of low level and line de-
vices. Tum the THRESHOLD control com-
pletely clockwise. Set the HOLD control to the
OFF position and set the RELEASE control
around lOOOdB/S. Apply the signal to be gated
to the input of the 363x and adjust the l
THRESHOLD control counter-clockwise until
the signal can be heard at the output. The
THRESHOLD control should be set so the gate
opens every time the signal is applied. If the dy-
namics of the instrument being gated changes
dramatically in the context of the performance,
it may be necessary to re-adjust the THRESH-
OLD to allow the softer signals to openthe gate.

. OPEN LED i

The green LED labelled "OPEN illuminates

when the signal has crossed over the set thresh- -

old level and quickly extinguishes when the sig-
nal falls under the threshold. This LED can also
serve as a signal present indicator when '
trouble-shooting through your system.

l

C. HOLD contrbl

l

The Hold control is used to reduce false trigger-
ing and to allow for a certain amount of decay
time inherentto some types of musical instru-
ments. The hold circuit begins its timing proc-
ess once the signal falls under the threshold.
The 363x provides up to a maximum of 3 sec-
onds of hold time. An example of when the
hold function would be utilized would be to al-
low a piano of guitar to fade naturally without
truncating the signal. Or another use would be
to capture the reverb as it is trailing off after the
initial snare drum hit. In order to capture the
entire envelope naturally, it will be necessary to
use the Release function in conjunction with
the Hold function. However, using a long hold
time with a short release time can create some
interesting special effects.

Hold LED

When the Hold function is used, the yellow
LED labelled HOLD" illuminates when the
signal falls below the threshold and remains il-
luminated until the hold circuitry has com-
pletely timed out.

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