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Thanks to the air cooling system, the heat-sink temperature can rise only about 10☌ above ambient temperature. Transistor BF495 (T2), together with a 10k resistor (R1), coil L, 22pF variable capacitor (VC), and internal capacitances of transistor BF494 (T1), comprises the Colpitts oscillator. The power factor control circuitry meets the international requirements for mains network disturbances.įM transmitter High efficiency cooling system. Here’s a simple FM receiver with minimum components for local FM reception. Highly efficient and widely over-rated power supply modules insure low heating, low AC power consumption and superior reliability. Limiter levels can be set from the front panel.įM transmitter Switch-mode power supply with power factor control. Powerful modulation limiter keeps the maximum frequency deviation within international requirements to avoid overmodulation and adjacent channels interference. Stereo FM Transmitter using BA1404 IC This is a stereo FM transmitter circuit using an IC from Rohmm semiconductors named BA1404 which is a monolithic IC and has a built-in stereo modulator, FM modulator, RF amplifier circuitries. Input sensitivity and output deviation adjustable with high precision of 0,05dB through front panel or remotely by web interface.įM transmitter level and phase of the pilot tone adjustable from the front panel and Web interface.ĪES / EBU digital stereo audio interface available as option. Signal/noise ratio >80dB assures the highest audio quality.
FM STEREO GENERATOR CIRCUIT FREE
It is impor- tant that the modulated carriers in such systems be free of extraneous. OATIS, Development Engineer alone imply that FM receivers for tele- metering purposes be capable of hand- ling higher modulation frequencies than they have in the past and, at the same time, provide for isolation of the more closely spaced subcarriers. Stereo Generator: high performance built-in digital stereo coder provides separation typical > 65dB. DESIGN OF AN IMPROVED FM-AM SIGNAL GENERATOR ARTHUR N. Meets or exceeds all international standards for safety and electrical specifications.įM transmitter MSE™: Magnetic Sound Enhancer is a magnetic barrier that protects the VCO, the heart of FM modulator, and increases sound quality.
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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.įM 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.Ĭompact design and low weight to reduce transportation costs and simplify logistics.įM transmitter High frequency stability in short and long terms assured by Digital Phase Locked Loop circuit with low drift VCTCXO.įM transmitter Complete WEB SERVER SNMP, GSM or SMS remote control, available as option.įM transmitter Complete remote management via WiFi with WiFi Touch, available as option.įM transmitter External reference oscillator, available as option: 10 MHz.įrequency Agile Broadband, settable directly from the LCD front panel with 10 KHz steps without need for tuning tools.