CATV Optical Communication
System Platform：WOS-3000
1. Summary
1. WOS-3000 CATV Optical Fiber Communication System Platform is a multi-functional
modularized Communication Platform which is developed to meet high-density requirements of
CATV MAN Handend Room Equipment.
2. WOS-3000 CATV Optical Fiber Communication System Platform designed two Power Supply
Modules and ten Function Modules in the room at the level of 19 3u, provide an intelligence
Centralized – Monitor Unit also. It is easy to install and agile to configure; powerful, intelligence
Centralized – Monitor Unit will monitor real-time operating parameters of each module, and will
give an alarm when the machine broke down; The two-hot backup power structure improve the
reliability of the system effectually with the Intelligent Temperature Control System controlled by
microcomputer.
3. There are GB Grade II Transponders which will realize centralized monitoring network based
on Ethernet in the WOS-3000 CATV Optical Fiber Communication System. There are also
RS-232 Communication Interface that is the best choice to build up the high-performance
two-way HFC Broadband Network.
4. Configurations: single or dual power supply back unit, 10-way optical transmission unit or
40-way opposite receiver unit that is full allocation, Forward Light Receiver or two-way optical
signal switch automatically, EDFA, optical switch, RF switch.
I.1550nm EDFA Module
1. Summary
 Adopt world famous brand low-noise pump laser. It has work width frequently and steady
output optical power.
 Adopt import high performance Erbium doped fiber. It has high efficiency on energy
transferring and low-noise.
 Completely SMT structure, small size, low consumption and high reliability.

The perfect Microcomputer automatic supervisory circuit is built in. It accurately monitor the
working status of laser to make sure this system can work steadily
2. Technique Parameters
Technique Parameter
Items
Unit
Working Bandwidth
nm
Input Optical Power Range
dBm
-12～+10
-8～+10
-3～+10
Output Optical Power
dBm
10 ～19
16 ～22
13 ～24
Output Power Stability
dB
Noise Figure(When the
Input Optical Power is 0dB )
dB
Return
Loss
Pump
Leakage
Power
Front
Circuit
Power
1535 ～1565
±0.5
≤ 4.0
≤ 4.0
Input Port
dB
≥ 45
Output Port
dB
≥ 45
Input Port
dBm
≤ -30
Output Port
dBm
≤ -30
C/N
dB
≥ 51
C/CTB
dB
≥ 63
C/CSO
dB
≥ 63
≤ 5.0
FC/APC 或 SC/APC
Optical Connector Type
Power Voltage
V
AC 160V～250V （50 Hz）
Working Temperature Range
℃
Indoor：-5～+55；Outdoor：-40～+65
Max Working Relative
Humidity
%
Max. 95%no condensation
Storage Temperature Range
℃
-30 ～+70
Max Storage Relative
Humidity
%
Max. 95%no condensation
Overall Dimension
mm
3. Block Diagram
Indoor：483（L）X 380（W）X 44（H）
Outdoor：550（L）X 280（W）X 218（H）
II. 1550nm Forward Optical Transmitter Module
1. Summary
 Develop and design specifically for overlay system, is mainly used in VOD system based on
IPQAM technical scheme.
 Use 1550nm Directly Modulated Lasers only used in Dense Wavelength Division
Multiplexing (DWDM) system, output optical wavelength is as long as standard ITU
wavelength.
 The section of RF driver uses Digital Automatic Processing of RF power developed
independently by us. It will adjust the RF drive power automatically according to the level
and number (15 ~ 84 channels) of input RF signal, to make sure C / CSO, C / CTB and
C / N Index always at their best. So the performance can be ensured, and Optical receiver
output level of optical receiver can be steady.
 Advanced multi-frequency RF Predistortion with GaAs devices, improve the C / CTB and C /
CSO
Index the most important part of CATV efficiently, extremely improve the C/N and
MER Index at the same time.
 Built-in perfect microcomputer automatic control circuit, monitor a variety of working
conditions of output power and laser in real time, to make sure the optical output power is
steady and extend the working life of the laser.
2. Technique Parameters
Items
Unit
Technique Parameters
Output Optical Power
mW
4 – 10
Optical Wavelength
nm
1562.23~1527.99
(ch19-ch62)
Laser Type
DFB Laser
Optical Modulating Mode
Directly Optical Intension Modulation
FC/APC 或 SC/APC
Optical Connector Type
Frequency Range
MHz
47～862
Input Level
dBμV
72～88
Flatness in Band
dB
±0.75
Input Impedance
Ω
75
Input Return Loss
dB
≥ 16（47～550）MHz；≥ 14（550～750/862MHz）
C/CTB
dB
≥ 65
C/CSO
dB
≥ 60
C/N
dB
≥ 51
AGC Controlled Range
dB
±8
MGC Controlled Range
dB
±8
Supply Voltage
V
AC 160V～250V（50 Hz）
Power Consumption
W
30
Operating Temperature
℃
0 ～+45
Storage Temperature
℃
-20 ～+65
Relative Humidity
%
Max 95%No Condensation
Dimension
mm
483（L）X 380（W）X 44（H）
3. Block Diagram
III.1310nm Forward Optical Transmitter Module
1. Summary
 Use international brand-name high performance DFB Laser with narrow line, good linearity
and high output power.
 The section of RF driver uses Digital Automatic Processing of RF power developed
independently by us. It will adjust the RF drive power automatically according to the level
and number (15 ~ 84 channels) of input RF signal, to make sure C / CSO, C / CTB and C /
N Index always at their best. So the performance can be ensured, and Optical receiver output
level of optical receiver can be steady.
 Advanced multi-frequency RF Predistortion with GaAs devices, improve the C / CTB and C /
CSO Index the most important part of CATV efficiently, extremely improve the C/N Index at

the same time.
Built-in perfect microcomputer automatic control circuit, monitor a variety of working
conditions of output power and laser in real time, to make sure the optical output power is
steady and extend the working life of the laser.
2. Technique Parameters
Items
Unit
Technique Parameters
Output Optical
Power
mW
4
6
8
10
12
14
16
18
20
22
Optical Link Loss
dB
7
9
10
11
11.8
12.5
13
13.6
14
14.4
Optical Wavelength
nm
1310±20
Laser Type
DFB Laser
Optical Modulating
Mode
Directly Optical Intension Modulation
Optical Connector
Type
FC/APC 或 SC/APC
Frequency Range
MHz
Input Level
dBμV
Flatness in Band
dB
±0.75
Input Impedance
Ω
75
Input Return Loss
dB
≥ 16（47～550）MHz；≥ 14（550～750/862MHz）
C/CTB
dB
≥ 65
C/CSO
dB
≥ 60
C/N
dB
≥ 51
AGC Controlled
Range
dB
±8
MGC Controlled
Range
dB
±8
Supply Voltage
V
AC 160V～250V（50 Hz）
Consumption
W
30
Operating
Temperature
℃
Storage Temperature
℃
-20 ～+65
Relative Humidity
%
Max 95%No Condensation
Dimension
mm
3. Block Diagram
47～750/862
Indoor：72～88；Outdoor：75～85
Indoor：-5～+55；Outdoor：-40～+65
Indoor：483（L）X 380（W）X 44（H）
Outdoor：550（L）X 280（W）X 218（H）
IV. Optical Switch Model
1. Summary
 Use American imported JDSU with low insert loss, short switch time and high reliability.
 Adopt advanced 32 processor, working in perfect automatic monitoring systemic circuit.
 It can timely monitor input power accurately and control status of switch witch is automatic
or manual.
2. Technique Parameters
Items
Unit
Technical Parameters
Operating Wavelength
nm
1200-1600
Insertion Loss
dB
Switching Time
ns
≤1.3
(Test at 1310nm、1490nm、1550nm)
≤5
Return Loss
dB
≥ 55
Max Input Optical Power
mW
500
≥10 Million times
Switching Life
Optical Connector Type
dB
FC/APC 或 SC/APC
Operating Temperature
Range
℃
-5 - +55
Storage Temperature
Range
℃
-30 - +70
Relative Humidity
%
Max 95% No Condensation
Consumption
W
≤2
Supply Voltage
V
AC160V – 250V （50 Hz）
Dimension
mm
483（L）X 270（W）X 44（H）
3. Block Diagram
V. RF Switch Mode
1. Summary
 RF Operating Bandwidth is 5-862MHZ.
 High Isolation is in the pass-band.
 Display channel status.
2. Technical Parameter
Item
Unit
Technical Parameter
Operating Band
MHz
5 ～862
Insertion Loss
dB
≤2
Flatness in Band
dB
±0.75
Isolation
dB
70
Input Impedance
Ω
75
Output Impedance
Ω
75
F 头（British System）
Input Return Loss
dB
5~550MHZ≥16；550~870MHZ≥14
Output Return Loss
dB
5~550MHZ≥16；550~870MHZ≥14
Max Switching Time
Operating Temperature
MS
℃
15
-20 ～+50
Relative Temperature
%
0 ～85
RF Connector
VI. Forward Optical Receiver Module
1. Summary
 Optic-Electric convertion part of Forward Optical Receiver Module is high sensitive PIN
detector. RF Pre-amplifier is All GaAs MMIC circuit. And output part is GaAs redoubled
power amplifier module.
 All use SMT production process, and the professional RF electrical muffler with good RF
muffler linear, equalization linear and high precision. Add advanced optical AGC control
circuit. When input optical power turn from -5 to +2dBm, the output level and C / CTB, C /
CSO index constant.
2. Technique Parameters
Items
Unit
Technique Parameters
Optical Parameters
Optical Receiving Power
dBm
-5～+2
Optical Return Loss
dB
>45
Optical Receiving Wavelength
nm
1100 ～1600
Optical Connector Type
SC/APC
单
Optical Fiber Type
模
Link Performance
C/N
dB
≥51 （-2dBm when receive）
C/CTB
dB
≥67
C/CSO
dB
≥62
Output level 98
dBμV
RF Parameters
Frequency Range
MHz
45～862
Flatness in Band
dB
±0.75
Rated Output Level
dBμV
≥98
Maximum Output Level
dBμV
≥104
Output Return Loss
dB
Output Impedance
Ω
75
Electric Control Equilibrium
Range
dB
0 ～10
Electric Control Attenuation
Range
dB
0 ～20
≥ 16（47～550）MHz；≥ 14（550～862MHz）
Generic Characteristics
Operating Temperature
℃
-40 ～60
Relative Temperature
%
Max 95%No Condensation
Power Dissipation
VA
≤ 15
★Special Notice:
The performance parameters of this manual according to GY/T 143-2000 (Specifications and
methods of measurement on AM optical transmitter and receiver used in CATV system) .We get it
under the following testing environment.
★Testing Environment:
Together with 10km standard optical fiber, optical passive attenuator and standard optical
transmitter make the testing circuit .Set with 59 PAL-D analog TV channel signal at range of
550MHZ in the fix index loss of circuit, transmit digital TV signal at rang of
550MHZ~862MHZ,the electricity (8 MHZ bandwidth) digital signal is 10dB lower than analog
signal of carrier electricity level. When the input of optical receiver is -1dBm, measure
C/CTB,C/CSO,C/N.
3. Block Diagram
VII. Reverse Optical Receiver Module
1. Summary
 Optic-Electric Convertion part of Reverse Optical Receiver Module is high sensitive PIN
detector .RF Pre-amplifier is all GaAs MMIC circuit.
 All use SMT production process, and the professional RF electrical muffler with good RF
muffler linear, equalization linear and high precision.
 Add advanced optical AGC control circuit. When input optical power turn from -10 to
+1dBm, the output level and other indexes constant.
 There are four independent optical receiver components in each module .These components
can receive 4 different independent road of return optical signal with independent adjustable
level.
2. Technique Parameters
Items
Unit
Technique Parameters
Optical Input Power Rang
dBm
+1～ -10
Propose Use Range
dBm
0 ～ -8
Nominal Optical Wavelength
nm
1310、1550 Dual Window
Optical Connector Type
Return Loss
SC/APC
≥45
dB
Optical Fiber Type
Single-mode
Frequency Range
MHz
5～65/200
Output Level
dBμV
≥90（-7dBm when receive）
Link Flatness
dB
±0.75
Return Loss
dB
≥16
Output Impedance
Ω
75
Output Level Adjusting Range
dB
0～10
RF Test Port
dB
-20
RF Output Level Stability
dB
Noise –to- power Dynamic
Range
dB
Consumption
±0.5（-25℃～ +55℃）
≥15（NPR≥30 dB）
Optical transmitter with
DFB laser
≥10（NPR≥30 dB）
Optical transmitter with
FP laser
W
25
Operating Temperature
℃
0 ～ 45
Relative Temperature
%
Max 95%No Condensation
Notice:
1. Flatness in Circuit and Noise Power Ratio Dynamic Range are indexes made up by Uplink Optical
Transmitter and Uplink Optical Receiver.
2. The difference between RF Excited Power and Signal Modulation of Uplink Optical Transmitter may
change the Output Power .So these given Output Level indexes are for your reference only.
3. Block Diagram
VIII. Power Module
1. Summary
High reliability PWM circuit with high efficiency energy conversion, low heating power, small
harmonics interference, hot backup and hot swap operation,
is in the Power Module .。
2. Technique Parameters
Input
Parameters
Output
Parameters
Generic
Characteristics
Input Level
Maximum Current
AC 180V ～250V ( 50Hz )
2A
Output Voltage
Maximum Current
AC Ripple
Voltage Stability
+24V
8A
50mVP-P
+5V
13A
50mVP-P
-5V
11A
50mVP-P
±1%（Load variation
range：10%～100% ，
Voltage variation
range：AC 180V ～
250V。
）
Operating
Temperature
Storage Temperature
-0℃ ～+45℃
-20℃ ～+65℃
Relative Temperature
Max 95%No Condensation
IX. Condition Monitoring Unit
Intelligent Centralized Condition Monitoring Unit is in the WOS-3000 CATV Optical Fiber
Communication System Platform .It select high-performance RISC microprocessors of PIC series
whose internal circuit is an advanced ASIC design. There is also powerful and complete control
software in it. So that the Monitoring Unit convenient, easy to expand upgrading, but also can
automatically identify each module slot on the type and function.
1. Performance Characteristics
 Its intelligence level is high because it can automatically identify the module type and the
function on slot; provide friendly interface to fully show
humanism modern design of
the industrial equipment.
 When the system under normal operation, the monitoring unit monitor the status of each
equipment module parameters by circle inquiring. And the present state parameters are stored
in the dynamic memory for inquire and invocation.
 When the equipment modules are out of work ，the microprocessor in the equipment
modules report fault information to the main processor in the monitoring unit in time by
breaking forcibly. Then the host processor issue alarm command to give an alarm after
triggering the sound and light alarm system.
 When the system administrator is doing maintenance operations it can inquire about the last
working condition parameters of each state, alarm information of system and fault content
through Network Management Software or the touch keys of the front panel. It not only
facilitate the system administrator’s routine maintenance work greatly, but also help system
administrators locate the fault point in time to recovery system in less time when the system
is out of work.
2. Main Monitoring Parameters
 1550nm EDFA module: Input Optical Power, Output Optical Power, Pump Laser(Bias
Current ,Purchase Cold Current);
 1550nm Direct Optical Transmitter Module: RF Input Level, Output Optical Power,
Laser(Bias Current ,Purchase Cold Current);
 1310nm Forward Optical Transmitter Module: RF Input Level, Output Optical Power
Laser(Bias Current ,Purchase Cold Current);
 Forward Optical Transmitter Module: Input Optical Power, Output RF Level;
 Reverse Optical Transmitter Module: Input Optical Power, Output RF Level;
 Optical Switching Module: Input Optical Power, Switching State;
 RF Switching Module: Input RF Level, Switching State;
 Power Module: Input Voltage, Output Voltage;