Description; Block Diagram - Rami VCA 200 Manuel Utilisateur

DESCRIPTION

VCA200 inserted in an amplification system, allows sound volume to be remote controlled. It
comprises two distinct channels which can be used either in stereo by putting two orders in parallel or
in dual mono.
VCA 200 could, for example, be inserted in a rack between a mixer and the amplifiers; the gain
control being offset by an interference insensitive wired link.
Depending on its use, there are two possible types of wiring :
For manual control, an external potentiometer will be wired between the 10V and the earth
(supplied by the VCA 200S) (3 care wiring).
For automatic gain control, voltage taken from between 0 and 10V would originate from
automatic audio visual equipment which directly controls the sound level (2 care wiring).
Several VCA200 linked together can, with a single overall control, adjust the sound of a multi-
amplification system (starts to several areas, cinema).
The gain of input / output can be either set or adjustable in the front of +/- 12dB. Each channel is
independent.
An output transformer TRA 20 is in option.
Precise adjust by multiturn trimer.

BLOCK DIAGRAM

A
BALANCED
INPUT
XLR3F
DB9F
REMOTE
0/10V
B
BALANCED
INPUT
XLR3F
ENGLISH
0 dB
FIXED
ADJUST
+ / - 12 dB
+10V
FIXED
ADJUST
10
+
VCA
+
VCA
A
BALANCED
OUTPUT
XLR3M
OPTION
B
BALANCED
OUTPUT
XLR3M
OPTION
Rami - VCA 200