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User Manual
Rev. 1.0 - 20/06/08
PJ500C-LCD, PJ700C-LCD & PJ1000light
This board is interfaced with other machine modules via
flat cables
and provides
for power supply, control signals and measurement distribution.
8.4 PWR Input Measure Board (SLMPIPPJ1KC)
This board enables measurement of the following parameters:
• Input power measurement;
• Main heat sink temperature measurement by an LM 50 sensor mounted on the
board; it obtain the temperature through a fixing screw.
Both measurements are adequately processed and sent to the interface board
that controls the protection modules and relays the signals to the CPU board to
enable readings to be displayed.
8.5 Power amplifier
The RF power amplification section consists in several power modules (two on
the
PJ500C-LCD
and
PJ700C-LCD
, three on the
PJ1000light
) coupled through
a Wilkinson splitter and combiner using strip-line technology.
Each RF module of the
PJ500C-LCD
(code SL010RF1002) provides 300 W rated
power - which rise up to 350 W each for the
PJ700C-LCD
and
PJ1000light
RF
modules (code SL010RF2002) - using a single active element built using MOS
technology. RF modules are fed by the switching power supply via the Bias
board.
The splitter (Splitter Board code SLSITEX500L1 for
PJ500C-LCD
and
PJ700C-
LCD
, or SLSPLTEX1KL1 for
PJ1000light
) splits the incoming power input signal
equally to all RF modules. The combiner (Combiner Board code SLCOTEX500L1
for
PJ500C-LCD
and
PJ700C-LCD
, or code SLCMBTEX1KL1 for
PJ1000light
)
combines the power output signals available at module outputs to obtain total
amplifier power.
Splitter, amplifiers and combiner have been designed to sum amplifier output power
signals in phase, so as to keep unbalance and power dissipation to a minimum.
The whole RF section is mounted on a finned heat sink with fan cooling.
8.6 LPF Board (SLLPFTEX1KL)
This board incorporates a low-pass filter to keep amplifier harmonics within
permissible limits as specified by international standards.
