93
(MT12 - Gb2004)
I
NTERCOMS *
V
IDEOINTERCOMS *
T
ELECOMMUNICATION
476. VIDEO DISTRIBUTOR-AMPLIFIER.
It allows for the distribution of the video signal
coming from the cameras on 5 independent
lines. It is not necessary to terminate on 75Ω
the unused outputs.
Connection of the coaxial cable with distribution on maximum 5 column rising (serial and/or with video distributors)
Connection of the coaxial cable with video signal distribution on more than 5 risers
In video systems with different
columns rising or with a high
number of users, it is necessary to
use the video distributor-ampli-
fier art.476.
It is not necessary to terminate the
unused outputs on the 75Ω resist-
ance.
If more than one video distributor is to be
used, an extra power supply, art. 1281 is
necessary.
Connection of art. 476 as video amplifier for long distance systems
For this use, one output is to be connected; do not terminate the other outputs on the 75Ω resistance.
Technical data
Power supply 21 ± 3Vdc
Operating current at max. load 250mA
Gain at max. load from 0 to 3.5dB (adjustable)
Gain with one output terminated to 75Ω
from 0 to 9dB (adjustable)
Bandwidth >5MHz
Operating temperature 0°÷+50°C
Maximum permissible humidity 90% RH
Housing DIN 8 modules A
Terminals
F General ground
14 Positive power supply
IN Video signal input
1-2-3-4-5 Video signal outputs
Video ground (shield of the coaxial
cable)
INSTALLATION INSTRUCTIONS
coax
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