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TV Transmitter /Transposer - “TX-RP” Series

Supplier: ARFC

The “TX-RP” series Television Transmitters and Transposers (repeaters) are fully solid state, high efficiency equipments, designed to meet a wide variety of requirements.

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General Features & Options

  • Automatic /Manual gain control (AGC/MGC), with front panel selection.
  • AGC features IF muting and RF output power amplifier switch off in absence of vision sync pulses or absence of local oscillator locking.
  • Transposer mutes in absence of input, avoiding transmission of noise.
  • Soft start on appearance of transposer input, to avoid output power surges.
  • Automatic RF Level Control (ALC) to stabilise the high power amplifiers RF output level over a limited range.
  • Input filter with low insertion loss and high selectivity for transposers (4 resonators).
  • Synthesised, programmable low phase noise local oscillator with microprocessor control.
  • High stability reference oscillator for line offset operation or for precision offset. This option can be supplied both for transmitters and transposers, also with the possibility to lock the internal reference oscillator to an external frequency standard (eg. GPS receiver).
  • Frequency-agile converter option with output channel front panel selection.
  • The TX-RP series Television Transmitters and Transposers (repeaters) are fully solid state, high efficiency equipments, designed to meet a wide variety of requirements.
  • The units are air cooled, providing combined vision and sound amplification (as standard). Careful product design brings high versatility, enhanced by the provision of specific options and giving compliance with major international standards.
  • All equipments use standard 19" rack mounting units. The basic equipments are in 3U chassis
  • SAW IF filters, specifi ed with reference to the particular standard, are employed in the VSB modulator of the Transmitter or to define the channel pass-band in the IF stages of the Transposer.
  • Video processor provide automatic video gain control, sync pulse shape restoration with amplitude stabilisation, digital black level clamping.
  • Dual channel sound carrier + stereo encoders (IF modulator options).
  • IF linearity precorrector to reduce in band intermodulation products and to correct distortions due to amplifiers non linearity.
  • Alarm circuit for output power lower than a pre-set threshold (normally 3dB/half power). This option is suitable for connection to a changeover unit or for remote signalling.
  • Telemetry to provide remote monitoring and control.

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