Prevail-Catv WT-1550-DM Manuel utilisateur
WT-1550-DM
Intelligent Direct Modulated
Optical Transmitter Operating Manual
WT-1550-DM Intelligent Direct Modulated Optical Transmitter
- 1 -
Table of Contents
Table of Contents ...................................................................................................... - 1 -
1. Overview............................................................................................................... - 2 -
1.1 About This Manual ...................................................................................... - 2 -
1.2 Product Description ..................................................................................... - 2 -
1.3 Product Applications .................................................................................... - 3 -
2. Technique Parameters ........................................................................................... - 4 -
3. Panel Interface and Menu System Description ..................................................... - 5 -
3.1 Front Panel ................................................................................................... - 5 -
3.1.1 Indicator Description ......................................................................... - 5 -
3.2 Rear Panel .................................................................................................... - 6 -
3.3 Power Module.............................................................................................. - 6 -
3.3.1 220V Power Module .......................................................................... - 6 -
3.4 Menu Operation ........................................................................................... - 7 -
3.4.1 Main Menu......................................................................................... - 7 -
3.4.2 Display Menu..................................................................................... - 8 -
3.4.3 Set Menu .......................................................................................... - 10 -
3.4.4 Alarm Menu ..................................................................................... - 11 -
4. Installing the WT-1550-DM Optical Transmitter ............................................... - 12 -
4.1 Receiving and Inspecting........................................................................... - 12 -
4.2 Precautions ................................................................................................. - 12 -
4.3 Mounting WT-1550-DM............................................................................ - 12 -
4.3.1 Mounting the WT-1550-DM in the Rack......................................... - 12 -
4.3.2 Connecting the RF Cables ............................................................... - 12 -
4.3.3 Connecting the Optical Fiber Cables ............................................... - 13 -
4.3.4 Connecting the Ethernet Cable ........................................................ - 13 -
4.3.5 Connecting Power ............................................................................ - 13 -
5. Communication Setup......................................................................................... - 14 -
5.1 RS232 Communication Interface Description ........................................... - 14 -
5.2 Set up the Hyper Terminal ......................................................................... - 14 -
5.3 Operating Parameters Configuration ......................................................... - 16 -
5.4 Remote Monitoring: SNMP....................................................................... - 19 -
6. Maintenance and Troubleshooting...................................................................... - 20 -
6.1 Cleaning Fiber Optic Connectors............................................................... - 20 -
6.1.1 Cleaning Patch Cord or Pigtail Fiber Optical Connectors ............... - 20 -
6.2 Troubleshooting ......................................................................................... - 21 -
6.3 After-sales Service Description.................................................................. - 21 -
6.4 Disclaimer .................................................................................................. - 21 -
WT-1550-DM Intelligent Direct Modulated Optical Transmitter
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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.
WT-1550-DM Intelligent Direct Modulated Optical Transmitter
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Block Diagram
WT-1550-DM directly modulated optical transmitter block diagram
WT-1550-DM inter-cut part block diagram
1.3 Product Applications
• 1550nm Optical fiber transmission system
• Construct the CATV network
• Local value-added services inter-cut
WT-1550-DM Intelligent Direct Modulated Optical Transmitter
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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 dBuV 75-85
Flatness in band dB ±0.75
RF input impedance Ω 75
Input return loss dB ≥ 16
C/CSO dB ≥ 60 25Km optical fiber, 0dB
received
C/CTB dB ≥ 65
C/N dB ≥ 51
AGC control range dB ±5
MGC control range dB 0-20
Supply voltage V AC 110V-250V (50Hz)
Consumption W 30
Operating temperature ℃ 0 -- 45
Storage temperature ℃ -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.
WT-1550-DM Intelligent Direct Modulated Optical Transmitter
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3.
Panel Interface and Menu System Description
3.1 Front Panel
Front panel schematic diagram
1 Power indicator 2 Running indicator 3 Laser indicator
4 RF input indicator 5 LCD 6 ESC key
7 UP key 8 DOWN key 9 Enter key
10 RF output test port 11 Laser switch
3.1.1 Indicator Description
Power indicator (POWER) Power on LED green
Running indicator (RUN) Run normally LED flash green
Lase
r
indicato
r
Laser OFF LED red
Laser ON LED green
RF in
p
ut indicator
(
RF
)
No output or exceed the normal range LED flash red
Normal LED green
11
WT-1550-DM Intelligent Direct Modulated Optical Transmitter
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3.2 Rear Panel
Rear Panel schematic diagram
No. Name Remark
1 Fan
2 RF input
3 Local RF input Generally reserved
4 Ground stud Used for the connection of device and ground wire
5 Optical input Inserted optical signal input (without inter-cut function, no this port)
6 Optical signal
output
This interface is the optical signal output port of the device (If select
inter-cut function, this port is mixed output)
7 RS232 interface Used for configuring the network management parameters.
8 LAN interface Correspond to IEEE802.3 10Base-T, used for network management.
9 Switching power
supply
Hot plug
3.3 Power Module
3.3.1 220V Power Module
1 Mounting screws 2220V/110V power outlet 3 Fuse
4 Power switch
1 2 3 4 567899
WT-1550-DM Intelligent Direct Modulated Optical Transmitter
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In: 0.0
dBuV
Out:10.3
dBm Enter
1. Dis
p
Parameters
ESC
2.Set Parameters
3.Alarm Status
3.4 Menu Operation
3.4.1 Main Menu
Displayed parameters Comments
Boot display
1.Disp Parameters Menu one: Display parameters
2.Set Parameters Menu two: Set parameters
3.Alarm Status Menu three: Alarm status
WT-1550-DM Intelligent Direct Modulated Optical Transmitter
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3.4.2 Display Menu
Laser Temp: xx.x℃
BOX Temp:
xx.x℃
1.Dis
p
Parameters
Enter
Laser Power:
xx.xdBm
OP After ATT:
xx.xdBm
Laser Bais:
xx.xmA
In
p
ut Power:
-xx.xdBm
Tec Current:
-x.xxA
RF Chan NO:
1
Laser RF:
xdBuV
RF Ctrl Mode:
MGC
RF Control Mode:
AGC
MGC ATT: XdB
AGC Ref:
xdB
Wave Len
g
th:
xxxx.xnm
ESC
+5V Read:
x.xxV
-5V Read:
-x.xxV
+24V Read:
xx.xxV
S/N:
xxxx.xx.xx
IP
:
xxx.xxx.xxx.xxx
Msk:
xxx.xxx.xxx.xxx
GTW:
xxx.xxx.xxx.xxx
Mac:
XX-XX-XX-XX-XX-XX
SofteWare Ver:
VX.X
WT-1550-DM Intelligent Direct Modulated Optical Transmitter
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Displayed parameters Comments
Laser Power Laser output optical power
OP After ATT Optical power after attenuation
(without inter-cut function, no this menu)
Input Power External optical signal power
(without inter-cut function, no this menu)
Laser Bais Laser bias current
Laser Temp Laser temperature
Tec Current Cooler current
RF Chan NO Channel number
Laser RF Laser RF power
RF Ctrl Mode RF control mode
MGC ATT MGC attenuation (in MGC mode)
AGC Ref AGC deviator (in AGC mode)
Wave Length Wavelength
+5V Read +5V monitoring voltage
-5V Read -5V monitoring voltage
+24V Read +24V monitoring voltage
S/N Serial number
BOX Temp Temperature
IP IP
Msk Subnet mask
GTW Gateway
Mac MAC address
SofteWare Ver Version number
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