R.V.R. Elettronica TEX1703, User Manual

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4
/ 36 User Manual
Rev. 1.0 - 27/05/21
TEX1703TFT
4.2 Features
The overall efficiency of the TEX1703TFT is over 70% over the entire band, which
is why it is part of the RVR Green Line family.
This performance characteristic is guaranteed in a range b 0.25dB and
-3 dB (+ 5% and -50%) with respect to the nominal power of the equipment: from
850W to 1785W for example in the case of the TEX1703TFT ; beyond these limits
the equipment is able to function correctly but cannot guarantee a performance
of 70%.
This transmitter contains a low-pass filter that reduces harmonic emissions below
the limits allowed by international regulations (CCIR, FCC or ETSI) and can be
connected directly to the antenna.
The salient features of the TEX1703TFT are compactness and great ease of use.
Furthermore, the equipment is designed in a modular way: the various functions are
performed by modules connected mostly with male and female connectors or with
flat cables terminated by connectors. This type of design facilitates maintenance
operations and the possible replacement of modules.
The RF power section uses for the TEX1703TFT two LD-MOS module capable
of delivering up to 850W with an efficiency of about 80%.
The working frequency is guaranteed by a reference oscillator that is temperature-
compensated and maintained by a PLL (Phase Locked Loop) system. The exciter
reaches the frequency lock in a maximum time of thirty seconds from power on.
The TEX1703TFT is able to work on the whole frequency band without requiring
calibration and setting operations.
The microprocessor control system includes a TFT touchscreen display on the
front panel and an emergency push-button panel with the following functions:
• Enabling/disabling of the output power.
• Setting the output power level.
• Setting the working frequency.
• Setting the audio parameters
• Setting the power output alarm threshold (“Power Good” function).
• Measurement and display of transmitter operating parameters.
• Communications with external devices such as programming systems or
telemetry systems via RS232 or I
2
C serial interface.