TEX702TFT
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User Manual
Rev. 1.0 - 29/04/21
ELETTRONICA
• Stereophonic coding
• Mixing of mono, MPX and SCA channels
• Clipper (limits the level of the modulating signal so that the frequency deviation
does not exceed 75kHz)
• Generation of the carrier of the modulated radiofrequency signal;
• Measurement of the modulating signal
7.3 Telemetry Board
This device is designed to provide the operating status of the equipment. All the
main input and output signals of the equipment are reported on the DB15 connector.
On the same card there is also the “INTERLOCK” BNC connector to disable the
device. By closing the centre pin to ground, the output power is reduced to zero
until the connection is removed.
When used with an RVR amplifier, this connector is connected via a BNC-BNC
connector to the REMOTE or INTERLOCK of the power amplifier. In case of
amplifier faults, the central conductor is grounded forcing the equipment to enter
stand-by mode.
7.4 Power Supply Block
The power supply of the
TEX702TFT
provides the two main power supplies:
1.
Services
. This voltage powers elements that do not directly affect the power
supply such as the motherboard, panel board and fans.
2.
Power supply
. This voltage powers the RF power amplifier module and protects
the equipment from any sudden fluctuations in the mains voltage.
7.5 Power Amplifier Block
The final power stage is enclosed in a totally shielded metal container fixed in the
central part of the equipment.
The RF signal coming from the input power connectors is sent to the final stage
which provides the last amplification up to 50W (for the
TEX702TFT
model).
