Description; Block Diagram - Ramiaudio VCA200 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
REMOTE
0/10V
B
BALANCED
INPUT
XLR3F
Rami
DB9F
+10V
0 dB
FIXED
VCA
ADJUST
+ / - 12 dB
FIXED
VCA
ADJUST
10
+
OPTION
+
OPTION
A
BALANCED
OUTPUT
XLR3M
B
BALANCED
OUTPUT
XLR3M
VCA200