1
Multiband amplifiers MA048LC, MA049L, MA049T, MA050L, MA050T
EN
Vers. 1.05
1
.
FM
input (MA048LC, MA049L, MA049T)
2
.
VHFIII
input (MA048LC, MA049L, MA049T)
FM+VHFIII
input (MA050L, MA050T)
3
.
UHF 1
input (MA048LC, MA049L, MA049T,
MA050L, MA050T), DC output
4
.
UHF 2
input (MA048LC)
5
. Internal DC and external equipment short circuit
and overload indicator
6
. 10 dB fine tuning gain regulators for each
sub-band
7
. 10 dB gain switches (10 dB attenuation for each
sub-band)
8
. Test point -30 dB
9
.
RF OUT
- RF signal output connector
10
. Switch to turn on/off the power feed for
external equipment
11
. Functional ground clamp
INSTALLATION INSTRUCTIONS
Read the product description and safety instruction first.
Installation of system according standard IEC60728-11 ensures safety of personnel and prevents apparatus against
damaging due to lightning or other sources of overvoltage surges.
If RF IN connectors on the amplifier are not used, connect to them the 75
Ω
loads.
8
5
9
7
6
6
10
11
4
3
2
1
12
12
Product description
Multiband amplifiers are intended to amplify FM radio signals, TV signals in VHF (6-12 channels), UHF (21-60 channels)
bands and special UHF (21-57 channels) band for MA048LC, UHF2 input.
There is a possibility to adjust the gain of the amplifier in every sub-band. The gain increases up to 10 dB by fine turning
regulators (6) clockwise in every sub-band and an additional 10 dB by switching switches (7) in VHF and UHF bands.
The amplifiers can provide power (+12 V) to external equipment through one UHF input connector (3). It is turned on and
off by switch (10). Power feed for external equipment has short circuit and overload protection. In normal conditions indicator
(5) glows green. If short circuit and overload conditions are detected - glows red.
Amplifiers have 30 dB LTE suppression filter
.
The amplifiers are intended for indoor use only.
Safety instructions
Installation of the amplifier must be done according IEC60728-11 and national safety standards.
The amplifiers are powered from mains 230 V~. This voltage is dangerous to life.
Any repairs must be done by a skilled personnel.
Do not remove the cover of the power supply section, without disconnecting the unit from the mains supply.
Do not plug the amplifier into the mains supply if the power cord or plug is damaged.
Do not plug the amplifier into the mains supply until all cables have been connected correctly.
The mains socket must be easily accessible.
The amplifier shall not be exposed to dripping or splashing water.
Avoid placing amplifier next to central heating components and in areas of high humidity.
If the amplifier has been kept in cold conditions for a long time, keep it in a warm room no less than 2 hours before
plugging into the mains.
Do not insert any objects into ventilation openings.
The ventilation should not be impeded by covering the ventilation openings with items, such as newspapers, table-cloths,
curtains.
Mount the amplifier in vertical position with RF input connectors underneath. The amplifier must be fixed with steel screws
Ø 4-5 mm
. The screws are not included in a package. Mount in locations where children not likely to be present. Shields of
cables must be connected to main potential equalization bus.
From top, front and bottom of installed amplifier must be at least 10 cm free space.
External view
