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User manual
Single-channel
amplifiers
chassis and "F" connectors that can be rack
or wall mounted.
The loop-through technique is used to mix
the output signal from the units.
The connection between the supply and the
modules, and between the modules them-
selves, is carried out via interconnecting
links.
They also dispose of a bypass current via
the input connectors to power the preampli-
fiers. This means that they can be disabled
using the switch located on the front of the
equipment.
When various modules are used in an
installation, the channels with higher
frequencies must be located near to the
output that is to be used.
(Only ref. 5085)
With ref. 5085, given the output directivity,
the mixing with the other channels in the
installation is carried out via connector "2"
and the output of the single channel, via
connector "3".
with
diecast
(Only ref. 5098)
If the installation uses amplifiers ref. 5098,
the adjacent channel modules should not be
mounted together (see application example
6).
(Only ref. 5097)
After installing the modules, it is necessary
to adjust the output level using the multi-
turn potentiometre "5" that is located on the
front of the unit. The output level will remain
constant because of the units' AGC.
The amplifier can work with analogue or
digital channels, by selecting "A" or "D" on
the "AGC" switch (4) depending on which
type of channel is going to be amplified.
The front LED informs us about the signal
levels at the input.
RED => Excessive signal
GREEN => Optimum signal
AMBER => Poor signal
54
Single Channel Amplifiers
(Only ref. 5080)
An amplifier with 2 IF inputs. It disposes of a
bypass current through the input connector
(2) to feed the LNB. It is possible to choose
between (7) vertical polarity powering,
horizontal polarity powering or switch the
power off, so as to be able to power it from
the outside.
Also, this input has a 22KHz tone to control
the LNB, that can be switched on at the
front (6).
When only one of the inputs is in use, the
other input should be charged with 75 .
When the LNB can be powered with either
of the two levels (for example ref. 7477, LNB
Quatro), is is advisable to select 18V.
In the output, it disposes of an input loop
through connector (3) for mixing the
headend's MATV signal.
It also has an attenuator (9) and an equaliser
(5) to treat the input signal and prepare it for
the distribution conditions.
If there is a short-circuit or overconsump-
tion, the amplifier warns the user - the LED
begins to blink.
LED colour
V
OFF
Green
LNB
V
ON (13 or 18V)
Amber
LNB
Short-circuit or
Blinking
overconsumption
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