1550nm Externally modulated optical transmitter

Externally modulated optical transmitter with SNMP management, indoor, 1550nm, 2 output port, ≥7mW output optical power, 47~862MHz, SBS, 13/16/18dBm or adjustable, imperial F type female port, FC/APC or SC/APC connector, RJ45 and RS232 port, VFD, 19" 1U.
Features:                                               
◇ Narrow bandwidth (Typ.=1MHz), lower noise, DFB continuous wave laser
◇ The operating bandwidth is up to 47~1080MHz
◇ Perfect index: Unique innovation technology, provide excellent CNR, CTB, CSO & SBS
◇ Perfect RS232 communication interface
◇ SNMP network management function optional
◇ 1+1 backup power supply optional
◇ Casing temperature auto-control
◇ Excellent P/P ratio
◇ AGC/MGC mode is optional at spot. OMI can be optimized at spot
 
Description
RFTV is a unidirectional analogue and digital video broadcast. It adopts high efficiency modulation mode for RF carrier wave and its economy, flexibility and bandwidth validity is beyond comparison of IPTV. By adopting EPON, GEPON or P2P access mode to realize triple-play and FTTx, RFTV broadcasting network in 1550nm optical wavelength still plays an important role and 1550nm externally modulated optical transmitter is the core equipment in this system.
1550nm externally modulated technology has no laser chirp, low dispersion distortion, and large extinction ratio, with excellent characteristic within 40~862MHz. External Modulator doesn't generate CSO distortion after reasonable bias. It can be followed by amplifier when used in large area coverage of over-long trunk and local networks. Adopting WDM, multi-wavelength optical channels can be transmitted through one fiber. 1550nm optical fiber CATV follows the current development trend of triple-play and fiber to home.
Parameter

Item	Specification
Optical feature
Optical wavelength	1548~1563nm 1530~1563nm		CATV wavelength ITU standard
Wavelength ADJ. range	±1.6nm(±200GHz)
Wavelength ADJ. mode	±0.5nm stepping
Linewidth	=0.651MHz		FWHM(△λ)
Side mode suppression ratio	45dB		SMSR
Extinction ratio	20dB		XP
Equivalent noise intensity	-160dB/Hz		RIN (20~1000MHz)
Output power	2x7		2x5, 2x9 options
Return loss	50dB
Optical fiber connector	FC/APC or SC/APC
RF feature
Work bandwidth	47~862MHz 47~1000MHz 47~1080MHz
Input level	18~28dBmV		AGC
Fatness	±0.75dB ≤±1.5dB		862~1000MHz
Rerun loss	＞16dB		47~1000MHz
Input impedance	75ohm
RF port	F female
Link feature
Transmit channel	PAL-D/60CH	PAL-D/99CH
CNR1	53dB	51.5dB	Back to back
CNR2	≥51.5dB	≥49.5dB	65km optical fiber 0dBm receive
CTB	-65dB	≤-65dB
CSO	-65dB	≤-65dB
SBS restrain	13~18dBm		Adjustable
General feature
Network management interface	RJ45, RS232		Support IE &SNMP
Power supply	90~265V/50/60Hz		-48V optional
Power consume	≤50W		Single power works
Work temperature	℃		Machine temperature Control automatically
Storage temperature	-40~85℃
Relative humidity	5~95%
Dimension	19inch,1U

Applications
◇ HFC network
◇ PON network