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EM 3000 He Dig Plus OMB | DMR -Elektronik

3KW FM Zender, EM 3000 HE DIG PLUS OMB Vergrößern

EM 3000 He Dig Plus OMB | DMR -Elektronik

OMB

EM 3000 HE D

Der 3KW FM -Sender, EM 3000 He Dig Plus, hat

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Mehr Infos EM 3000 He Dig Plus OMB | DMR -Elektronik

The 3KW FM transmitter, EM 3000 HE DIG PLUS, has been created by the OMB center of development for high efficiency transmitters. It consists on the high efficiency 3KW amplifier, FMA 3000 HE, with 72% efficiency and the EM 25 DIG PLUS, a 25W FM transmitter. The high efficiency 3-3.5KW amplifier has an approximate consumption of 4200VA at 230Vac, so it pays for itself in a short period of time due to its low consumption. This 3KW FM transmitter is also available in Dual Drive version

 

EM 3000 HE DIG

 
Product Discription:

MAIN FEATURES OF THE 3KW FM DIGITAL TRANSMITTER MANUFACTURED BY OMB:
 

  • AC Efficiency: 72% (typical value). RF Efficiency RF: 84% (typical value)
  • 4 amplifying modules of 900W with MOSFET technology
  • 3 independent switching power supplies connected in parallel so if there is a failure in any of them the equipment maintains its operation
  • TFT screen and touch keyboard for the control and visualization of operational parameters.
  • Memory registration of events
  • Control of the speed of cooling fans depending on the temperature at the power modules for optimizing power consumption and decreasing acoustic contamination
  • Advanced protection against load mismatches without interrupting the transmission and ultra-fast protection in case of excessive reflected power and input power
  • Analog telemetry, digital RS232 remote control and telemetry, remote control by opened/closed contacts.
  • Low pass filter, EMI filters and internal single-phase transient suppressor
  • Automatic power reduction at night if the amplifier is combined with the EM 25 DIG PLUS
  • Automatic power reduction in case of high temperature, the equipment returns automatically to its rated power value when the temperature reaches back an average value
  • Automatic power reduction in case of failure of one of the power supplies and in case of excessive reflected power.
  • Automatic voltage control for efficiency optimization
GENERAL CHARACTERISTICS

AMPLIFIER FMA 3000 HE
FREQUENCY RANGE 87.5-108MHz
INPUT RETURN LOSS -20dB
INPUT POWER <25W
OUTPUT POWER 3-3.5KW nominal, manual and automatic adjustable
POWER GAIN >21.3dB minimum
TOTAL EFFICIENCY >73% typical
RF EFFICIENCY 84% typical
COOLING Forced air, speed control of fans
HARMONICS LEVEL -82dBc
INPUT/OUTPUT IMPEDANCE 50Ω
RF INPUT CONNECTOR N(F)
RF OUTPUT CONNECTOR 7/16"or EIA 7/8" (under request)
RF MONITOR CONNECTOR BNC(F)
POWER SUPPLY 230VAC ±15% → 195 ÷ 265VAC, 50/60Hz
CONSUMPTION 4200VA (@3000W output power)
PROTECTIONS Reflected power, forward power, overdrive, and overcurrent in power modules. Smart temperature protection. Ultra-fast protection against reflected and input power. Real time registration of events. Exciter’s inhibition
TELEMETRY AND REMOTE CONTROL Analog telemetry (direct and reflected power measurements). Digital telemetry and remote control RS232. Remote control by opened/closed contacts
OPERATION TEMPERATURE -5 to +40°C
WEIGHT 45Kg approx. (without rack)
DIMENSIONS 5 standar

EXCITER EM 25 DIG PLUS
FREQUENCY RANGE 87.5-108MHz
FM MODULATION 75KHz (adjustable) peak deviation. Mono 180kF3E and Stereo 256kF3E
AUDIO/MPX INPUT LEVEL -3.5 @ +12.5dBm @ 75KHz deviation
AUDIO INPUT CONNECTORS XLR(F)
AUXILIARY CHANNEL (RDS/SCA) INPUT LEVEL 7.5KHz deviation: -12.5 to 3.5dBm and 2KHz deviation: -24 to -8dBm
AUX. CHANNEL INPUT IMPEDANCE 10kOhm
MODULATION DISTORTION 7.5Khz deviation: <0.05%, 0.02% typical; 2KHz deviation: <0.2%, 0.05% typical
S/N MONO RATIO 30 to 20000Hz: >76dB, 86dB typical, CCIR: >75dB, 81dB typical

 

Technical specifications:

S/N STEREO RATIO 30 to 20000Hz: >72dB, 77dB typical, CCIR: >68dB, 72dB typical
AUDIO CHANNELS BANDWIDTH 30 to 15000Hz ±0.1dB
PRE-EMPHASIS TIME CONSTANT Selectable, 25/50/75 microseconds
RF NOMINAL OUTPUT POWER 25W
TUNING STEPS OF TRANSMITTER 10/100KHz
ALC OUTPUT POWER STABILITY ±3%
SPURIOUS AND HARMONIC EMISSIONS <80dBc
RF OUTPUT IMPEDANCE 50Ω
RF INPUT POWER CONNECTOR N
RF SAMPLING CONNECTOR BNC
POWER SUPPLY 110-230Vac ±15% 50-60Hz
OPERATION TEMPERATURE RANGE 0 to 40°C recommended, -10 to 55°C max.
RELATIVE HUMIDITY Up to 95% without condensation
DIMENSIONS 484x300x90mm, 2 standard rack units of 19"
WEIGHT 7Kg

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