Multiband amplifiers MA044M, MA045M
EN
Vers. 1.02
8
5
9
7
6
6
10
11
4
3
2
1
12
Product description
Multiband amplifiers MA044M, MA045M are intended to amplify FM radio and TV signals in VHF+FM, VHFIII and UHF bands.
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) by a
switch ON/OFF (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.
The amplifiers are intended for indoor use only.
Safety instructions
Installation of the amplifiers must be done according IEC60728-11 and national safety standards.
The amplifier is powered from mains 230 V~. This voltage is dangerous to life.
Any repairs must be done by a qualified personnel.
The amplifier is double isolated from the mains 230 V~.
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.
To disconnect the amplifier from the mains completely, disconnect plug from the mains socket.
The mains socket must be easily accessible.
The amplifier shall not be exposed to dripping or splashing water and no objects filled with liquids, such as vases, shall
be placed on it.
Avoid placing amplifier next to central heating components and in areas of high humidity.
No naked flame sources, such as lighted candles, should be placed on amplifier.
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.
From top, front and bottom of installed amplifier must be at least 10 cm free space.
External view
1
.
VHFI+FM
input
2
.
VHFIII
input
3
.
UHF
input
, DC output
4
.
UHF
input (MA044M)
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
.
ON/OFF
switch - DC feeding for preamplifier
11
. Functional ground clamp
12
. Screwdriver
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 inputs connectors on the amplifier are not used, connect to them the 75
Ω
loads.
