2KW FM Zender, EM 2000 HE DIG PLUS OMB

Product Discription:

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MAIN FEATURES OF THE 2KW FM DIGITAL TRANSMITTER MANUFACTURED BY OMB:
 

• Typical AC efficiency >73% and typical RF efficiency of 84%.
• Two amplifying modules of 1000W with MOSFET technology.
• Two independent switching power supplies connected in parallel to maintain the equipment working in case any of them fails.
• TFT screen and touch keyboard to control and to visualize operation parameters.
• Memory recording of events.
• Speed control of cooling fans according to temperature of power modules so as to optimize consumption and to decrease acoustic contamination.
• Advanced protection against load mismatches without transmission cuts and fast protection in case of excessive reflected power and/or excessive input power.
• Analog telemetry, digital remote control and telemetry RS232, remote control by opened/closed contacts
• Low pass filter, Mains EMI filter and internal single-phase transient suppressor.
• Automatic power reduction at night when used in combination with the EM 25 DIG PLUS transmitter.
• 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 excessive reflected power.
• Automatic voltage control for efficiency optimization.
• Power supplies of the amplifier are hot removable and interchangeable.
• Automatic voltage control for efficiency optimization
   

GENERAL CHARACTERISTICS

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CHARACTERISTICS AMPLIFIER FMA 2000 HE HPPS
FREQUENCY RANGE	87.5-108MHz
INPUT RETURN LOSS	-20dB
INPUT POWER	<15W
OUTPUT POWER	2000W nominal, manual and automatic adjustable
POWER GAIN	19.2dB minimum
TOTAL EFFICIENCY	>73% typical
RF EFFICIENCY	84% typical
COOLING	Forced air, speed control of fans
HARMONICS LEVEL	-80dBc
INPUT/OUTPUT IMPEDANCE	50Ω
RF INPUT CONNECTOR	N(F)
RF OUTPUT CONNECTOR	7/16"or EIA 7/8"
RF MONITOR CONNECTOR	BNC(F)
POWER SUPPLY	230VAC ±15% → 195 ÷ 265VAC, 50/60Hz
CONSUMPTION	2600VA (@2000W 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	20Kg approx. (without rack)
DIMENSIONS	3 standard rack

 

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:

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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