MAIN CHARACTERISTICS

• The GREEN RF™ technology, combined with new 65:1 devices, is the latest evolution of the world-famous patented COLD-FET™ technology applied on DB’s transmitters.
• FM transmitter Low maintenance costs thanks to the easy access to all components, external cooling air filters, very high MTBF for RF and power supply modules.
• Compact design and low weight to reduce transportation costs and simplify logistics.
• FM transmitter High frequency stability in short and long terms assured by Digital Phase Locked Loop circuit with low drift VCTCXO.
• FM transmitter Complete WEB SERVER SNMP, GSM or SMS remote control, available as option.
• FM transmitter Complete remote management via WiFi with WiFi Touch, available as option.
• FM transmitter External reference oscillator, available as option: 10 MHz.
• Frequency Agile Broadband, settable directly from the LCD front panel with 10 KHz steps without need for tuning tools.
• Meets or exceeds all international standards for safety and electrical specifications.

  HIGHLIGHTS

  • FM transmitter MSE™: Magnetic Sound Enhancer is a magnetic barrier that protects the VCO, the heart of FM modulator, and increases sound quality.
  • Stereo Generator: high performance built-in digital stereo coder provides separation typical > 65dB.
  • Signal/noise ratio >80dB assures the highest audio quality.
  • Input sensitivity and output deviation adjustable with high precision of 0,05dB through front panel or remotely by web interface.
  • FM transmitter level and phase of the pilot tone adjustable from the front panel and Web interface.
  • AES / EBU digital stereo audio interface available as option.
  • Powerful modulation limiter keeps the maximum frequency deviation within international requirements to avoid overmodulation and adjacent channels interference. Limiter levels can be set from the front panel.
  • FM transmitter Switch-mode power supply with power factor control. Highly efficient and widely over-rated power supply modules insure low heating, low AC power consumption and superior reliability. The power factor control circuitry meets the international requirements for mains network disturbances.
  • FM transmitter High efficiency cooling system. Thanks to the air cooling system, the heat-sink temperature can rise only about 10°C above ambient temperature. This guarantees the proper functioning even in sites with extreme climate conditions and high temperature.

    EFFICIENCY ENHANCEMENT

    FM transmitter Mozart design was optimized to get minimum losses of the passive elements and excellent performances of the active elements in order to increase the AC efficiency up to more than 70%.

    GENERAL
    Frequency Range	87.5 to 108 Mhz adjustable with 10Khz step
    Output impedance	50 Ω
    Output connectors	N from 30W up to 500W
    Deviation capability	±75 kHz, up to ±200 kHz with distortion < 0.5%
    Short term stability	± 1 ppm from -5 to +45 °C
    RF harmonics	Exceeds CCIR/FCC requirements
    RF spurious	Exceeds CCIR/FCC requirements
    Pre-emphasis	0, 25, 50, 75 us (selectable)
    Modulation monitoring	BNC connector
    Pilot tone	Phase and Amplitude adjustable from display and WEB interface
    Log file	Up to 200 dated events saved in the transmitter memory, accessible from display and WEB interface

     

    AUDIO INPUTS
    Modulating input signal	Mono, Stereo (Left, Right, Left + Right), Encoded stereo (MPX), SCA, RDS, AUX, Digital AES/EBU
    Input sensitivity adjustment	With 0,05dB steps by front panel display interface or by WEB interface
    Limiter	It can be enabled/disabled and adjusted from 30 kHz to 180 kHz by front panel display and WEB interface
    Internal RDS coder	Synchronized with the 19kHz pilot of the internal stereo coder or the 19kHz pilot of an external MPX signal

     

    MONO
    Audio input levels for +/- 75 kHz deviation	Adjustable from -9 to +18 dBu
    Audio response ±0.3 dB (30 Hz to 15 kHz)	Synchronized with the 19kHz pilot of the internal stereo coder or the 19kHz pilot of an external MPX signal
    THD+N on encoded channels	< 0.06% ( typ. 0.03% ) (30 Hz to 15 kHz)
    Audio Impedance	600Ω Balanced
    Audio connector	XLR

     

    STEREO
    Audio input levels for +/- 75 kHz deviation	Adjustable from -9 to +18 dBu
    Audio response	±0.3 dB (30 Hz to 15 kHz)
    THD+N on encoded channels	< 0.03% (30 Hz to 15 kHz)
    Audio Impedance	10 kΩ Unbalanced or 600Ω Balanced
    Audio connector	XLR (Left & Right)

     

    MPX (EXTERNAL CODER)
    Audio input levels for +/- 75 kHz deviation	Adjustable from -6 to +6 dBu or from +6 to +18 dBu (selectable at order)
    THD+N on encoded channels	< 0.03% (30 Hz to 100 kHz)
    Audio Impedance	> 5 kΩ Unbalanced
    Audio connector	BNC

     

    RDS/SCA/AUX
    Audio input levels for +/- 75 kHz deviation	Adjustable from -19.5 to +7.5 dBu
    Audio Impedance	2 kΩ (others on request) Unbalanced
    Audio connector	BNC

     

    AES/EBU
    Audio input levels for +/- 75 kHz deviation	Adjustable from -15 to 0 dBFS
    Audio Impedance	110 Ω
    Audio connector	XLR

     

    AC POWER REQUIREMENTS
    AC supply voltage	115 / 230 VAC ± 15%, single-phase
    AC supply frequency	50 Hz or 60 Hz, ±5%
    Power factor	> 0.9

     

    ENVIRONMENT
    Cooling Forced	air
    Service	Continuous 24/24h
    Operating temperature	-5°C to +45°C Derate 3°C per 500 m above 2000 mt asl
    Relative humidity	Up to