Televes IF Manuel D'utilisation page 38

User manual
An Amplifier with "F" connectors that can be
either wall or rack mounted.
The connection between the supply and the
modules, as well as that between the
modules themselves, is carried out via some
links with the appropriate connectors.
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 ohm.
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.
38
IF Amplifier
LED indications
LED colour
V OFF Green
LNB
V ON (13 or 18V) Amber
LNB
Short-circuit or
Blinking
overconsumption