Ctav 1GHz Intelligent Direct Modulatedoptical Transmitter

• Type: Fiber Transceiver
• Condition: New
• Application: 2690MHz Optical Transmitter
• Transport Package: Netrual or According to Customer′s Request
• Specification: 1RU
• Trademark: Prevail/Fobetmoc
• Model NO.: WT1550DM
• Origin: China
• Production Capacity: 500PCS/Month

Product Description

1. Overview

1.1 About This Manual

This instruction manual is a complete guide to install and operate the (1RU) WT-1550-DM optical transmitter. Please read the entire manual before beginning installation.
This manual applies to WT-1550-DM optical transmitter.
• Chapter 1 gives general information about the WT-1550-DM optical transmitter.
• Chapter 2 describes the complete technical specifications of WT-1550-DM.
• Chapter 3 describes the front/rear panel interfaces and menu system.
• Chapter 4 tells you how to install WT-1550-DM optical transmitter.
• Chapter 5 tells you the communication setting of WT-1550-DM.
• Chapter 6 describes maintenance and what to do in the event of problems.

1.2 Product Description

WT-1550-DM intelligent directly modulated optical transmitter is mainly used in 1550nm optical fiber transmission system. Adopt advanced electronic dispersion compensation technology, accurately compensate according to the actual transmission distance by 1km stepping. The maximum compensated distance up to 50km.
WT-1550-DM intelligent directly modulated optical transmitter is the most important equipment to construct the CATV network. It mainly used for the value-added services of TV image signal, digital television signal, telephone voice signal and data (or compressed data) signal. By built-in WDM, multiplex the inter-cut optical signal and the main optical signal then output. After setting required optical difference, the perfect adjustable optical attenuation function can automatic control the inserted optical signal according to the main optical signal, realize inter-cut system full automatic adjustment. Provide high quality low cost solution for all-optical relay 1550 optical fiber CATV system, and local value-added services inter-cut.

Characteristics:

1. Patent pre-distortion circuit.
2. The optical fiber distance is adjustable according to the actual use condition by 1km stepping.
3. WT-1550-DMII: Built-in WDM, multiplex the inserted optical signal and the main optical signal then output.
4. WT-1550-DM III: Built-in WDM and adjustable attenuator.

Model Selection:
WT-1550-DM-I: standard 1550nm directly modulated optical transmitter, the default optical output power is 10mW, and the optical output wavelength can choose ITU standard wavelength.
WT-1550-DM-II: on the base of WT-1550-DM-I, add inter-cut function and built-in WDM. The WDM specification please specify when ordering.
WT-1550-DM-III: on the base of WT-1550-DM-II, add VOA Variable Optical Attenuator, can adjust the signal optical power intensity by the menu options on the front panel.

1.3 Product Applications

• 1550nm Optical fiber transmission system
• Construct the CATV network
• Local value-added services inter-cut

2. Technique Parameters

Item	Unit	Technique Parameters
Output optical power	mW	10*
Optical wavelength	nm	1550±10 (have to be ITU wavelength when with inter-cut function)
Dispersion compensation distance	Km	≤50
Laser type		DFB laser
Optical modulation mode		Direct optical intensity modulation
Optical connector type		FC/APC or SC/APC
Frequency range	MHz	47-862/1003
RF input level	dBμV	75-85
Flatness in band	dB	±0.75
RF input impedance	Ω	75
Input return loss	dB	≥ 16
AGC control range	dB	±5
MGC control range	dB	0-20
Supply voltage	V	AC 110V-250V (50Hz)
Consumption	W	30
Operating temperature	ºC	0 -- 45
Storage temperature	ºC	-20 -- +65
Relative humidity	%	Max 95% no condensation
Dimension	mm	483(L)×380(W)×44(H)

Special instructions: The performance parameters of this manual according to the measuring method of GY/T 143-2000 <Specifications and methods of measurement on AM optical transmitter and receiver used in CATV systems>, and tested under the specified test conditions.
* The output optical power doesn't involve optical ATT and WDM insertion loss. Optical ATT+WDM insertion loss≤ 1.5dB,optical ATT or WDM insertion loss ≤ 1dB.

Test Indicators

Test Model	C42	D59	D84
Channel	CENELEC42	PAL D59	PAL D84
C/N	50	49	47.5
CSO	60	60	58
CTB	65	65	65
25km optical fiber, -1dBm receiving optical power, 80dBμV input

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