Description

• 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%.

 

MODEL	OUTPUT POWER (W)	DIMENSIONS
Mozart 30	30	19″x1U
Mozart 50	50	19″x1U
Mozart 100	100	19″x2U
Mozart 300	300	19″x2U
Mozart 500	500	19″x2U

 

 

GENERAL
Frequency Range	87.5 to 108 Mhz adjustable with 10Khz step
Output impedance	50 Ω
Output connectors	N from 30W up to 500W
	DIN 7/16 for 1kW
	EIA 7/8″ for 2kW and 3kW
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 95%