Elenos Broadcast Experience

ET7000

ET7000 - 7000W ICEFET FM TRANSMITTERS

The ET7000-3.5 is build by combining 2 units of E3500 driven by an ETG300 DR in a 20U rack.

Switching power supply system, high performance (380 V. Threephase). Proportional logic protections, uninterruptable operation, predisposed for telemetry (See ECHOS 3). Composed by: 2x E 3500, 2-ways combiner, + ETG 300 DR 20-Unit Rack.

Highlights

ICEFET® This innovative Elenos application combines the very high yield of Mosfet with a maximum efficiency dissipator. The result is a drastic reduction of temperature and a consequent increase in MTBF, thereby allowing us to develop the smallest and lightest transmitters available on the market.
ALWAYS FUNCTIONAL Thanks to “SOFT FAILURE DESIGN”, efficient protection systems and redundancy of apparatus otherwise needed to eliminate "SINGLE-POINT-FAILURES”, Elenos transmitters are always «ON AIR» even under extreme work conditions.
IPC (Intelligent Power Control) Another exclusive Elenos application. IPC maintains constant output power within 2% of the defined value, regardless of fluctuations in supply voltage, RF piloting or charge conditions.
IPF (Intelligent Proportional Foldback) IPF is an intelligent system that varies the apparatus output power in relation to changes in charge conditions so that the transmitter can always function even under significantly variable charges.
BROAD BAND The declared technical performances of the transmitter are maintained across the entire 88-108 MHz band without the need for any kind of calibration. This means it is ideal for n+1 applications.
CONSTANT YIELD The supply voltage to Mosfet and Bias systems are both controlled to optimise yield at any frequency and output power level. This means low heating, high yield and consequent low operating costs.
NO IPA Elenos avoids using intermediate charge amplifiers to eliminate one of the redundancy bottlenecks frequently present in medium-high power transmitters.
EASY MAINTENANCE All components (RF modules, electronic control cards, fans, power supply units) are easily accessed from top and bottom sections and from front and rear panels.
SMS ALARMS/TELEMETRY Connection to a GSM modem ensures SMS notification of eventual alarms, faults and machine status. SMS also ensures inter-action with the transmitter. A remote PC can be used to maintain control and interaction of all transmitter operating parameters. The industrial standard Hostlink protocol ensures safe control of an enormous quantity of information for remote diagnostics.
WORLD-WIDE TECHNICAL SERVICE ELENOS is a producer of FM apparatus with one of largest distribution channels in the world. Every distributor is essentially chosen for the technical support it can offer to clients.

Redundancy

2 Exciters (in the DUAL DRIVE model )
2 RF Power Amplifiers
24 MOSFET
6 Power Supplies
Each PA has its own fans, power supplies, and Low-Pass Filters.
2 x E3500 amplifiers
1 x 2 ways combiner 3600W input-7000W output
1 x Unbalanced load 2 x 3600W inputs able to handle the maximun unbalance power without derating of the output power.
1 x TCU-Transmitter Control Unit with LCD displau and redundant power supply.

Composition

ET7000-3.5 is build by combining 2 units of E3500 driven by an ETG300 DR in a 20U rack.

Technical Features

7000 watt output nominal power (adjustable with continuity)
7500 watt maximum peak power
24 MOSFET Philips BLF278
6 Current Share combined 2.5KW PFC switching Power Supply
12 Microprocessor Speed Controlled Blowers
Microprocessor controlled
2 Output Harmonic Low Pass Filters
ETG 300 Exciter (Dual Drive optional)
2 x E3500 amplifiers
2 ways combiner 3600W input-7000W output
Unbalanced load 2 x 3600W inputs able to handle the maximun unbalance power without derating of the output power.
TCU-Transmitter Control Unit with LCD display and redundant power supply.
RF Output Connector: 1+5/8"
Available Rack : 20 and 32 Unit
20 U. Rack dimensions (WxHxD) : 1082x1072x565
32 U. Rack dimensions (WxHxD) : 1082x1647x565
Weight : 120 Kg
Power supply: 220, 380 VAC single-threephase 50/60 Hz
Power consumption : 10 KVA
Cooling flow : Variable from 800 to 1600 m3/h
Available with Top or Rear RF and Air outlet

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