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OPERATING
A multichannel amplifier consists of highly isolated individual amplifiers for every incoming line. Gain controls of each
amplifier is located between input and output connectors of corresponding line.
Terrestrial line amplifier has slope regulator placed near the corresponding gain control. The SAT line amplifiers have
constant slope of 7 dB.
Amplifiers series SA901 provide voltage 18 V to all horizontal polarization connectors, voltage 14 V to all vertical polarization
connectors and 12 V to terrestrial input connector. The switch on the output side of multichannel amplifier enables disconnecting
of output "H, Lo" and "H, Hi" connectors from 18 V power supply. This is useful in large networks for prevention of interference
among several power supply units that are incorporated. The switch near the terrestrial path allows disconnecting of voltage
12 V from input line to prevent short-circuting of power supply if terrestrial amplifier is not installed.
Both 18 V and 14 V voltage sources has short-circuit protection with LED indicators. Green light on it indicates normal
operation. Red light signals, that short-circuit occurred in corresponding circuit. After that the power supply must be
disconnected from mains and network must be repaired. Do not connect power supply before 30 seconds time passed.
Amplifiers series SA911 are powered through all horizontal polarization lines. This way enables to minimize the loss
of voltage in the lines. Multichannel amplifier SA911 consumes the current of 300 mA from 18 V power supply and up to
600 mA from 9 V power supply. If LED indicator becomes red it is showing that supply voltage is under the allowable
limit of 9 V.
Both series of amplifiers have DC through path in every SAT line. It provides flexibility for installation of power supply
units inside the network.
TECHNICAL CHARACTERISTICS
Type
Frequency range
SAT IF
terrestrial TV
Gain
SAT IF
terrestrial TV
Slope
SAT IF
terrestrial TV
Isolation
SAT-SAT
SAT-Terr
Noise figure, typical
Output level IMD3=60 dB (DIN45004B)
Output level IMD3=35 dB (EN50083-3)
External equipment
through V lines
powering
through H lines
through Terr line
DC pass through, switchable through H lines
Power consumption
Operating temperature range
Dimensions
Weight (packed)
*
without external DC loading; with maximal external DC load - 57 W
** in line powering of SA911 through H lines
2
SA901
SA911
950-2400 MHz
47-862 MHz
15-22 dB (0 ÷ -10 dB adjustable)
17 dB (0 ÷ -17 dB adjustable)
7 dB (fixed)
0 ÷ 15 dB (adjustable)
30 dB
30 dB
≤ 9 dB
112 dBµV (for terrestrial TV)
114 dBµV (for SAT IF)
14 V (14 V+12 V
0.5 A max.)
18 V
2 A max. (switchable)
12 V
0.1 A max. (switchable)
2 A max.
187-250V~ 50/60 Hz 11W*
DC 9-18 V 6 W**
-20
÷ +50
C
o
o
291x128x53 mm
234x128x53 mm
1 kg
0.75 kg
APPLICATION DIAGRAM / ПРИМЕР ПРИМЕНЕНИЯ / DIAGRAMAS DE APLICACIÓN
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-
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See www.terraelectronics.com for more information about multiswitches MS951, MS952 and power
supply PS182F.
Figure 1. 8 SAT IF signals and terrestrial TV signals
distribution system up to 40 outlets.
LNB powering from power supply of the launch amplifier.
Figura 1. Distribución de 8 señales SAT FI y señal terrestre
hasta 40 usuarios.
Alimentación del LNB desde fuente de alimentación externa.
Рис.1. Образец сети для 24-ех абонентов с питанием от
внешнего источника.
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