FM Broadcasting Transmitter

Dual professional exciters; With L/R sound channel Bal/Unb and MPX input interfaces, and SCA,RDS auxiliary interfaces

RF Specifications
Rated Output Power	1kW
Frequency Range	87~108MHz
Carrier Frequency Deviation	±1ppm (-10~50°C)
Load Impedance	50Ω
Output Connector	7/8” flange
Residual Wave Radiation	<1mW and <-60dB  (relative carrier)
Output Power Deviation	±10%( Impedance: 50Ω)
Audio Specifications
Input Connector	XLR (Bal. or Unb.)
Input Impedance	600Ω(Bal.)(or) 10KΩ(Unb.)
Input Level	-13dBm~+13dBm
Pre-emphases	50μs(Allowing deviation in dual standard curves: -2 dB )
Max Frequency Deviation	±75kHz
Max Modulation Capacity	±100kHz
Audio Frequency Response	±0.5dB(30Hz~15kHz)
Total Harmonic Distortion	<0.2% (F±75kHz , 30Hz~15kHz);   <0.5% (F±100kHz, 30Hz~15kHz)
Pilot Frequency	19kHz±1Hz
Percentage of Pilot Signal Modulation	8%~10%
Pilot Signal Phase Deviation	±5°
Sub-carrier Suppression	>45dB
L/R Signal Level Difference	<0.5dB(30Hz~15kHz)
Stereo Separation	≥50dB (100Hz~10kHz);  ≥45dB(30Hz~15kHz)
Asynchronous AM S/N Ratio	<-55dB(Un-modulated)
FM S/N Ratio	>70dB
Environmental Factors
Working Temperature	-10~+50°C
Relative Humidity	<95% (No condensation at 25°C)
Atmosphere Pressure	86~106Kpa
Power Supply	single phase:AC;220V\±15%;50Hz±10% 3 phase:AC;380V\±15%;50Hz±10%
Cooling	Forced air cooling with built-in fan
Machine Room	Few dust, No oscillation and impact
Dimensions	1400(H)×600(W)×900(D)mm3

l         All-solid-state circuit design and combined transmission of video/audio carrier, convenient to upgrade to digital TV transmitter. Below 1KW/1KW/3KW/5KW.

l         Dual professional exciters for optional demands, MOSFET all-solid-state circuit design technology are able to guarantee the reliability and stability of stereo FM signal transmission.

l         High performance stereophonic encoder, state-of-the-art sound quality.

l         With L/R sound channel Bal/Unb and MPX input interfaces, and SCA,RDS auxiliary interfaces.

l         Could ser on Full-frequency rang(87-108MHz),Parallel redundancy design of power amplifier, The hot-plug power units could backup each other, ensure that there is no single fault of transmitter.

l         With self intellectual property rights. Develop power amplifier, power combiner, monitoring system independently.

l         Local or remote control, friendly man-machine interface by microcomputer unit, it can display and control the operating mode of exciters, power amplifier units and transmitter, with GSM message auto alarm module, and fixed timing starting up and shutdown functions.

l         Wide voltage stability range and high efficiency of power supply.

l         With over-voltage, over-current, over-heat, over-excitation, low-voltage, absent-phase, short-circuit and over-VSWR auto-protective functions; with multiple-measure of thunder-proof, it could run securely.

l         Forced-air-cooling design with low power consumption and low noise.

FM Broadcasting Transmitter