Description
20kW FM professional radio transmitter
Available with RF nominal power of 20000W.
The High Power 20 kW FM Transmitter combines a very compact size, costs and maintenance
20.000 W solid state FM transmitter ‐ 41U racks included
FM Modular Transmitter
Ultra-high efficiency line in FM Broadcasting industry with hot swappable PSU
MAIN CHARACTERISTICS:
- The new technology, combined with new 65:1 device, is the latest evolution of the world-famous patented COLD-FET™ technology applied on these serie transmitters.
- Ultra high RF efficiency (>70%):
- Hot Swappable Power Supply Units: It makes easier the serviceability and the maintenance. Their tool-less and instant installation from front panel make the transmitters ideal for critical environment systems where no down time can be tolerated.
- Automatic Current Sharing (ACS): the automatic current balancing system is present on each unit to grant a perfect load distribution and very best power supply operating conditions.
- Versatile configuration, high redundancy: different configurations are available for model and number of power supply units installed. They grant the redundancy and a versatile configuration for a very high efficient operation in each condition.
- Hot Plug Version: transmitters over 5 kW can be equipped optionally with the hot plug system to instantly extract the amplifier modules with transmitter in full power.
- Low maintenance costs: thanks to the easy access to all components, external cooling air filters, very high MTBF for RF and power supply modules.
- High frequency stability in short and long terms assured by Digital Phase Locked Loop circuit with low drift VCTCXO.
- Complete WEB SERVER SNMP remote control, available as an option.
- Frequency agile broadband: settable directly from the LCD front panel with 10 KHz steps without needing any tuning tools.
- Maximum security: Meets or exceeds all the international safety standards as the electrical specifications.
HIGHLIGHTS:
- Sound quality
- 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.
- Intelligent protection system: it reduces the output power without on-air interruption, keeping the RF devices always within the safe operating parameter.
- AAD™ technology: it prevents corrosion from air moisture and increases reliability.
- 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.
FM Transmitter E/PF Series design was optimized to get minimum losses of the passive elements and excellent performances of the active elements 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 |
| Deviation capability | ±75 kHz, up to ±200 kHz with distortion < 0.5% |
| Pre-emphasis | 0, 25, 50, 75 us (selectable) |
| Synchronous AM | (ref. 100% mod.) < – 58 dB |
| Asynchronous AM | (ref. 100% mod.) < – 50 dB |
| RF Probe | -50 dBc, 50 Ω, BNC |
| Power stability | < 2% (ALC) |
| DC to RF efficiency | 83% typ |
| Modulation monitoring | BNC connector |
| Pilot tone | hase and Amplitude adjustable from display and WEB interface |
| Log file | Up to 200 dated events memorized 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 connectors | Left (XLR connector), Right (XLR connector), MPX (BNC connector), SCA (BNC connector), RDS (BNC connector), AUX (BNC connector), AES/EBU (XLR connector) |
| AUDIO INPUT LEVELS FOR ± 75 KHZ DEVIATION | |
|---|---|
| Mono | Adjustable from -9 to 18 dBu |
| Stereo | Adjustable from -9 to 18 dBu |
| MPX | Adjustable from -6 to 6 dBu or from 6 to 18 dBu (selectable at order) |
| AES/EBU | Adjustable from -15 to 0 dBFS |
| 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 |
| AC POWER REQUIREMENTS | |
|---|---|
| AC supply voltage | 115 / 230 VAC ± 15%, single-phase or 230/380 VAC ± 15%, three-phases |
| AC supply frequency | 50 Hz or 60 Hz, ±5% |
| Power factor | > 0.9 |
| ENVIRONMENT | |
|---|---|
| Cooling | Forced air with built-in axial fans / Liquid cooling (optional) |
| 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% |
Our new High Power FM Transmitters : Ask the new catalog about our new High Power FM Transmitters: redundant, ELETEC’s devices are designed to ensure reliable broadcasting transmissions.
