1550nm External Optical Transmitter Modulation CATV with Dual Power Supply

Product Description

Product Description 1. Overview 1.1 About This Manual
This instruction manual is guide to install and operate the (1RU) WT1550-EM20 series 1550nm external modulated optical transmitter. Please read the entire manual before beginning installation.
This manual applies to WT1550-EM20 series external modulated optical transmitter.
1.2 Product Description
WT1550-EM20 series optical transmitter adopt top-international brand external modulated laser and external modulator, Prevail patent pre-distortion circuit and SBS control circuit. Overall indexes reach to well-known brand types level, and price is inexpensive.We have sold thousands of products over the years.The products save plenty of costs for operator's network construction and get many users' good reputation.
1.3 Features
This 1550nm optical transmitter can be used in long-distance transmission.
Double microwave source SBS control, +13~+19dBm adjustable, 0.5dB step.
Adopt the DFB laser and LiNbO3 external modulator.
support Ethernet transponder
support WEB and SNMP network management.
Hot backup dual power modules

2. Technique Parameters2.1 Optical Parameters

Item	Unit	Value
Optical Wavelength	nm	1545~1560 (or specified by the user)
Side-mode Suppression ratio	dB	>30
Relative Intensity Noise	dB/Hz	<-160
Wavelength Adjustment Range	GHz	+/-50GHz
Optical Power	dBm	2*7, 2*8, 2*9, 2*10
SBS Threshold Value	dBm	+13~+19 (Continuously adjustable)
Laser Linewidth	MHz	0.3

2.2 Model Test Indicators

Test Model	C42	D59	D84
Channel Plan	CENELEC42	PAL D59	PAL D84
Channel Number TV/FM/QAM64	42/0/0	59/0/0	84/0/0
Bandwidth Noise	5	5	5
CNR Tx/Rx	55.0	54.0	52.5
CNR Link 1	54.0	53.5	52.0
CNR Link 2	53.0	52.5	50.5
CNR Link 3	50.5	50.5	49.0
CSO Tx/Rx and Link 1	64	64	64
CSO Link 2	63	64	64
CSO Link 3	62	62	62
CTB	62	62	62

2.3 Test Condition

	First stage EDFA	First paragraph fiber length	Second stage EDFA	Second paragraph fiber length	RX	SBS (dBm)
Tx/Rx	No	No	No	no	0dBm	13.5
Link 1	No	35km	no	no	0dBm	13.5
Link 2	16dBm	65km	no	no	0dBm	16
Link 3	13dBm	50km	13dBm	50km	0dBm	13.5

2.4 Technical Data Sheet

Item	Unit	Technical Parameters
RF range	MHz	47~1003
RF flatness	dB	±0.75
RF return loss	dB	>16
RF input impedance	Ω	75
RF input connector type		F type
Input level range	dBµV	80±5
AGC control range	dB	+3~-3
MGC adjustable range	dB	0~15
Optical connector		SC/APC, FC/APC
Operating temperature	°C	-5~45
Storage temperature	°C	-30~+70
Power Source Specification	V	90~265VAC
		36~72VDC
Consumption	W	≤60
Dimension	mm	483(L) × 455(W) × 44(H)
Total Weight	kg	5.5

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