FM stereo broadcast transmitter

Short Description:

FM stereo broadcast transmitter series products are Dexin’s newest generation of FM stereo Broadcast Transmitter with low and medium power.

It adopts advanced third generation of FM modulation technologies: digital signal processing (FPGA) and digital frequency synthesis technology (DAC). DFT-72XX series transmitters take use of the advantage of audio processing technology to provide users a CD quality hearing experience with high linear and high gain LDMOS tube amplifier module.

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Key Features

* Fully complying with national standard (GB/T4311-2000) and industrial standard (GY/T169-2001)

* Adopt high gain and high linear LDMOS tube amplifier module design

* Adopt international advanced signal processing technology (FPGA) for audio encoding

* Support AGC function with sustained power output (±0.1dB) to ensure the transmitter a good stability and reliability

* Adjustable output power as needed (10W～10kW)

* Low power consumption and super linear design to improve the transmission power, and reduce the nonlinear distortion

* LED on the front panel supporting alarm and signal monitor

* High-efficiency power supply with wide range of voltage (AC100～264V), suitable for different working condition

* Equipped with multiple lightning protection measures

* Support fault self-diagnosis and self-protection

* Air-cooled system with low consumption and low noise

* Multi lightning protection measures, good protection for whole equipment

* Full digital front panel control, easy operation

* 24-hour working unmanned, user friendly design

* Two Transmitters can be connected simultaneously by Coaxial switch, and one for back up

Technical Specifications

S/No.	Item		Unit	Technical Index		Remark
1	Output Power		W	500
2	Frequency		MHz	1kW≤	65.5~87; 87~108
				1kW＞	87～108
3	Frequency deviation		Hz	≤500
4	Sparious Radiation		dB	≤-70
5	parasitic amplitude modulation noise		dB	-60
6	Pilot frequency deviation		Hz	±1
7	S signal 38kHz Residual component		dB	＜-40
8	Deviation (100% modulation)		kHz	±75
9	pre-emphasis		µs	50
10	Distortion (100% modulation)	L	％	＜0.2
		R
11	Frequency response (without emphasis, de-emphasis)	L	dB	±0.2
		R
12	Frequency response (with emphasis, de-emphasis)	L	dB	±0.2
		R
13	SNR (100% modulation)	L	dB	≥75
		R
14	L/R Separation	L R	dB	＞70
		R L
15	L/R level diffrence		dB	＜0.1

Specifications and Environment Conditions

Item	Item	Technical Requirements		Remark
Output and Input Specifications	RDS input	BNC interface(57KHz)
	Input interface	XLR, AES/EBU(Optional)
	Output interface	L29-50K
Environment condition	Working temperature	-20～+50℃
	Storage temperature	-30～+75℃
	Relatively humidity	＜95% (25℃ no condensation)
	Cooling mode	inside forced air cooling
	atm press	86～106kPa
	power supply	AC, 100～264V/50Hz
	machine room	Less dust, shock-free
	Demission (L×W×H)	10~30W	482×420×44mm
		100W	482×420×88mm
		300~1kW	482×560×176mm
		3kW	600×800×1080mm
		5kW	600×1050×1695mm
		10kW	650×1050×1695mm