9
EN
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Programmable digital / analogue headend amplifier for use in both single family buildings or in communal buildings,
characterised by: ease of installation, simple programming, high gain, external programmer, low consumption powering.
It disposes of 3 programmable UHF inputs split into 10 filters. The number of filters per input can be selected among
three possible configurations (10-0-0, 9-0-1, 7-2-1, 6-3-1 and 5-3-2), which will be carried out according to the chan-
nels that are received by each antenna
(Fig. 2)
.
These inputs are pre-amplified, and can be selected any channel from 21 to 69 with a bandwidth up to 5 channels in
anyone of the filters
(Fig. 3)
.
The output levels of the filters are automatically balanced with a selectable compensation slope.
The UHF & BI/BIII/DAB
(BIII)
1
inputs disposes of an automatic powering system that is able to withstand short circuits.
The gain is regulated by an automatic attenuation system in both the FM
(BI+FM)
1
input as well as in the BI/BIII/DAB
(BIII)
1
input.
The amplifier disposes of a Broadband input (47-862 MHz), intended for possible expansions in the system, such as
the inclusion of a satellite headend or TDT’s.
The amplification of the band between 950 to 2,150 MHz, of sloped band gain, is a response to the most recent ins-
tallation needs, as is the incorporation of digital television in communal TV installations, and it reinforces its use in ICT
distributions.
The mixing of the MATV band and the IF band is carried out by a filtering system that guarantees the absence of
interferences between channels from both bands.
The
"Avant"
unit can be programmed before the installation is carried out and without an input signal, and the levels
can be adjusted later without the use of the programmer, using the “reset” button located to the left of the program-
mer’s connector.
To do so, take the following steps:
Select the adequate parameters for the installation using the programmer (channels, output level, equalisation
slope ...) and press the
adjustment button (pressed for longer). As the programming is carried out without the input
signal, the adjustment will stop when it does not detect a UHF signal. The remote control can then be put away, as
although the adjustment process has been interrupted, the data selected has been memorised by the unit.
Afterwards, in the installation, and after connecting the inputs that are being used and loading the outputs with 75
ohms, the user simply has to press the “Reset” button and the unit will carry out the adjustment process. The adjust-
ment of the “
Avant”
unit via the “Reset” button is carried out in the same way as with the programmer, although in this
case, the process will not stop if the units detect an error in the input levels and the red error LED will only light up when
there is an error in the level of any of the filters.
If the unit has been programmed with the desired parameters for the installation (channels, output level, equalisation
slope ...), when the reset button is pressed, the
“Avant”
unit will carry out an automatic adjustment of the levels in the
same way as when the programmer’s
adjustment button is pressed for a longer period of time. The green LED will
light up indicating that the levels of all the UHF channels are being adjusted (that the unit has in its memory) of the FM,
VHF and IF amplifiers, while maintaing the input configurations, the equalisation slope and the output levels that it had
already configured.
Using “Reset” button
Introduction
NO T E:
The complete user manual is available in the CD that is provided with the product
The headend amplifier
(Fig. 1)
is provided with:
1
.- UHF1 + V
input
2
.- UHF2 + V
input
3
.- UHF3 + V
input
4
.- FM
(BI+FM)
1
input
5
.- BI / BIII / DAB + V
(BIII + V
)
1
input
6
.- 47-862 MHz input
7
.- FI / SAT +13/17V
0/22 KHz input
8
.- Switching on LED
9
.- 196 - 264 V~ powering supply
10
.- Reset Button
11
.- Programming unit connector
12
.- MATV output
13
.- MATV + FI output
14
.- 7234 Programmer unit
Inputs/Outputs/Connections description
(
1
)
VHF inputs distribution for ref 532870: BI+FM & BIII
