User's Manual

TEX1002LCD
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User Manual
Rev. 2.1 - 26/06/19
The same board also features the “INTERLOCK” BNC connector for disabling the
device. By grounding the central pin, the output power is reduced to zero until the
connection is removed.
When an R.V.R. amplifier is used, this connector is linked to the power amplifier
REMOTE or INTERLOCK by means of a BNC-BNC connection. In case of amplifier
faults, the central conductor is grounded thus forcing the machine to enter in
stand-by mode.
7.4 Power supply
The amplification stage of TEX1002LCD consists of two main blocks:
1. Service: This section contains elements that do not regard directly the power
supply, they are::
- Service transformer
- Power switch
- Service fuse
2. Power supply: various units supplies an adapted supply to RF power amplifier
modules. The units that compose power supply are rectifier (PFC) and switching
power supplies.
7.5 Power amplifier
The final power stage is enclosed in a totally shielded metal container fastened
in the centre of the device.
The RF signal coming from input power connectors, is measured by input directional
coupler card and is then sent to the final stage that sees to its final amplifications
up to 1000W (for TEX1002LCD model).
The amplification stage consists of two main blocks.
In addition to the actual RF amplification, this circuit carries out the following
functions:
• Control of the power level in output, depending on the setting
• Reduction of the power supplied when in presence of high-level reflected
power
• Measures of the current absorbed by the power amplifier
• Measures of the temperature