TEX1000-LCD
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User Manual
Rev. 1.1 - 23/06/05
8. Working Principles
A schematic view of the modules and connections making up the
TEX1000-LCD
is
shown in figure 8.1.
DRIVER
SPLITTER
MAIN BOARD
LPF +
DIRECT. COUPL.
COMBINER
FUSE BOARD
BIAS
INTERFACE
PANEL
TELEMETRY
ALIM 50V 25A
SURGE
PROT.
PFC
(RECTIFIER)
LED CARD
INPUT
(AUDIO/RDS)
R.F.
OUTPUT
RF MODULES
MAINS
R.F.
R.F.
4 X R.F.
4 X R.F.
R.F.
DC
4 X 50VDC
5 X VPA (50VDC)
VPA (50VDC)
4 X VPA (50VDC)
FWD PWR
RFL PWR
BIAS
PS ALARM
VOLTAGE REG.
Figure 8.1
Below a brief description of each module's functions is given, whereas the complete
diagrams and layout of the cards are given in the “Technical appendix” in vol.2.
8.1 Power Supply
The
TEX1000-LCD
power supply is composed by three important sections:
1. Over range protection. Surge Protection board (see cap. 8.1.1) protects machine
from eventual unexpected variations of the mains voltage.
2. Service. This section contains elements that do not regard directly the power
supply, they are:
- Service transformer
- Power switch
- Service voltage selector
- Service fuse
3. Power Supply. Various units supplies an adapted supply to RF power amplifier
modules. The units that compose power supply are rectifiers (PFC or traditionals)
and switching supply. Machine is available in different configuration for voltage
rectify:
- One PFC (only 230V)
- Two PFC (115-230V)
- One rectifier (only 230V)
- Two rectifiers (115-230V)
