QuestTel EDFA Ampifier
CATV EDFA Optical Amplifier
1550nm 24dBm
User Manual
L-RF-EDFA-24dBm
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L-RF-EDFA-24dBm
EDFA Optical Amplifier User Manual
Table of contents
Table of contents ....................................................................................................... - 1 Foreword ................................................................................................................... - 2 1. Product Summary.................................................................................................. - 3 2. Performance Characteristics ................................................................................. - 3 3. Block diagram ....................................................................................................... - 4 4. Technique Parameter ............................................................................................ - 4 4.1 Link test conditions ...................................................................................... - 4 4.2 Technique Parameters .................................................................................. - 5 5. External Function Description .............................................................................. - 6 5.1 Front Panel Description ............................................................................... - 6 5.2 Rear Panel Description ................................................................................ - 7 5.3 Displayed Parameter description ................................................................. - 8 6. Installation debugging.......................................................................................... - 12 6.1 Unpack and Check ..................................................................................... - 12 6.2 Instruments and Tools ................................................................................ - 12 6.3 Installation Steps ........................................................................................ - 12 7. Clean and maintenance method of the optical fiber active connector ................ - 13 -
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EDFA Optical Amplifier User Manual
Foreword
This manual applies to L-RF-EDFA series 1550nm EDFA. It mainly describes
the performance characteristics, technical parameters, installation and debugging,
common troubleshooting, and other related content of the product. In order to ensure
that the equipment can be successfully installed and safely operated, please read this
manual carefully before installing and debugging the equipment. And the installation
and debugging should be strictly according to the specified steps on the manual to
avoid unnecessary damage to equipment or accident harm to the operator. Any
questions, please contact with us in time.
Special Tips:
1)Er-doped Fiber Amplifier is high end professional equipment, and its installation
and debugging must be operated by special technician. Read this manual carefully
before operating to avoid damage to equipment caused by fault operation or
accident harm to the operator.
2)While the fiber amplifier is working, there is an invisible laser beam from the
optical output adapter on the front panel. Avoiding permanent harm to the body
and eye, the optical output should not aim at the human body and human should
not look directly at the optical output with the naked eye!
3)Please make sure that the ground terminal of the case and power outlet has been
reliably grounding before turning on the power (Grounding resistance should be <
4Ω) to prevent the static damage the pump laser device and harm to human
because of case charged.
4)To ensure the equipment can work stable over a long time in voltage unsteady or
poor voltage wave region, it´s recommend to the customer that he equips special
AC regulated power supply, or even AC uninterrupted power supply (UPS) system
for conditional regions. In the region with large temperature variation environment
(The equipment's ideal work environment temperature is 25°C) or bad room
environment it´s recommend to the customer that he equips special air-condition
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EDFA Optical Amplifier User Manual
system to improve the work environment.
1. Product Summary
L-RF-EDFA series 1550nm optical fiber amplifier is the important optical relay
transmission equipment in 1550nm optical fiber communication system. It mainly
used for the long distance optical fiber transmission of TV image signal, digital
television signal, telephone voice signal and data (or compressed data) signal. This
product does use the high-performance erbium doped fiber and low noise pump laser,
and built-in perfect embedded automatic monitoring system, to ensure the excellent
performance indicators.
2. Performance Characteristics

Automatic control the output optical power.

The output optical power is adjustable, attenuation range is 0-3dB.

Adopt high-performance erbium doped fiber, high efficiency energy conversion.

Adopt advanced 32 bit processor, coordinate with perfect automatic monitoring
systemic circuit. It can timely and accurately monitor optical output power and
various work status of the pump laser, ensures the stable optical output power and
can effectively extend the working life of the pump laser.

Built-in blue screen 160×32 dot matrix LCD monitor on the front panel,
accurately showing all working status parameters.

19″1U height standard rack mount, equipped standard IEEE802.3 10Base-T
Ethernet interface and RS232 interface, can expediently realizes network
management monitoring.

Full support <GB/T 20030-2005HFC Network device management system
specification>.
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3. Block diagram
4. Technique Parameter
4.1 Link test conditions
Special instructions: The performance parameters of this manual according to the
measuring method of GY/T 184-2002 < CATV system analog optical fiber amplifier
technical requirements and measuring method>, and tested in the following
conditions.
Test condition: With standard optical fiber and standard optical receiver composed
the test link. Set 59 PAL-D analog TV channel signal at 550MHz frequency range
under the specified link loss. Transmit digital modulation signal at range of 550 MHz
~ 862MHz, the digital modulation signal level (in 8 MHz bandwidth) is 10dB lower
than analog signal carrier level. When the input optical power of optical receiver is
-1dBm, measure the C/CTB, C/CSO and C/N.
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4.2 Technique Parameters
Item
Unit
Technique parameter
Operating bandwidth
nm
1535 - 1565
Input optical power
range
dBm
-5 - +10
Output optical power
dBm
Output power stability
dBm
13, 14, 15, 16, 17, 18, 19, 20,
21, 22, 23, 24
±0.2
Noise figure
dB
≤ 5.0
dB
dB
dBm
dBm
≥ 45
≥ 45
≤ -30
≤ -30
Return loss
Pump leakage
power
Input
Output
Input
Output
Optical connector type
Optional
Input optical
power 0dBm
FC/APC or SC/APC
Power supply voltage
V
AC160V - 250V(50 Hz)
Consumption
W
< 30
°C
-5 - +55
%
Max 95% No Condensation
°C
-30 - +70
%
Max 95% No Condensation
mm
483(W)×340(D)× 44(H)
Operating Temperature
Range
Maximum operating
relative humidity
Storage Temperature
Range
Maximum storage
relative humidity
Dimension
Remark
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5. External Function Description
5.1 Front Panel Description
Schematic diagram of the front panel
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
Power indicator: Switching power supply one power working – yellow; dual
powers working – green.
Input optical power indicator:The input optical power is lower than the given
threshold – red; normal – green.
Pump working status indicator: Red light means the pump is not working, but the
machine parameters are normal; flashing red light means the machine has broken
down, related fault reason see the alarm menu of the display menu; Green light
means the pump is working normal.
Output optical power indicator: This light turns on when the output optical power
is large than +10dBm.
160×32 Dot-matrix LCD screen: used to display all the parameters of the
machine.
Display the exit or cancel key of the setup menu.
Display the up or increase key of the setup menu.
Display the down or decrease key of the setup menu.
Display the enter key of the setup menu.
Pump laser switching key: used to control the working status of pump laser. “ON”
means the pump laser is open and “OFF” means the pump laser is closed. Ensure
the key is on “OFF” position before power on. After passing self-test, rotate the
key to “ON” position according to the displayed message.
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5.2 Rear Panel Description
Schematic diagram of the rear panel
1) Fan outlet
2) Optical signal input: Two common interface types are FC/APC and SC/APC.
3) Optical signal output: This interface is the optical signal output port of the device.
Two common interface types are FC/APC and SC/APC. Note: There is an
invisible laser beam from this port while working normal. So the port should not
be aligned to the human body or the naked eyes to avoid accidental injury.
4) RS232 interface: Used for configuring the network management parameters.
5) LAN interface: correspond to IEEE802.3 10Base-T, used for network
management.
6) AC power input of power supply 1.
7) Switch of power supply 1.
8) AC power input of power supply 2.
9) Switch of power supply 2.
10) Ground stud of the chassis: used for the connection of the device and ground
wire.
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5.3 Displayed Parameter description
Name
System Starting
Suspend Page
Main Page
1.Disp
Parameters
display
QuestTel
L-RF-EDFA-24dBm
xxxxxxx
In: xx.x out: xx.x
Unit: dBm
1.Disp Parameters
2.Set Parameters
3.Alarm Status
Input Power: xx.x dBm
Output Power: xx.x dBm
Output ATT: x.x dBm
Pump1 Bias: x mA
Pump1 Temper: xx.x°C
Pump1 Tec: x.xx A
Pump2 Bias: x mA
Pump2 Temper: xx.x °C
Pump2 Tec: x.xx A
+5V Read: x.x V
-5V Read: -x.x V
System Temper: xx.x °C
Serial NO.: xxxxxxxx
IP Addr: xxx.xxx.xxx.xxx
Mask: xxx.xxx.xxx.xxx
Gateway: xxx.xxx.xxx.xxx
Mac: xxxxxxxxxxxx
Trap Addr1:
xxx.xxx.xxx.xxx
Trap Addr2:
xxx.xxx.xxx.xxx
Firmware Ver: Vx.xx
discription
Display logo.
Display model number.
Start countdown / lock status.
Display the input / output optical power
Entry of parameter display menu
Entry of parameter setting menu
Entry of alarm information menu
Input power, accurate to 0.1 dBm
Output power, accurate to 0.1 dBm
Output power ATT, accurate to 0.1 dBm
Bias current of pump1, accurate to 1mA
Temperature of pump1, accurate to 0.1°C
Cooling current of pump1, accurate to 0.01 A
Bias current of pump2, accurate to 1m A
Temperature of pump2, accurate to 0.1 °C
Cooling current of pump2, accurate to 0.01 A
+5V power supply voltage , accurate to 0.1 V
-5V power supply voltage , accurate to 0.1 V
Chassis temperature, accurate to 0.1 °C
Device serial number
IP address
Subnet mask
Gateway
Physical address
trap1 address
trap2 address
Firmware Version number
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Set the input optical power low alarm
threshold, range -10.0~9.9dBm
Set the input optical power high alarm
Set High Input Threshold
threshold , range -10.0~10.0dBm
Set the constant optical power output
Set APC MODE
function, on or off
Set the output optical power attenuation,range
Set Output ATT
-4.0~0.5dBm
IP Addr
Set IP address
Mask
Set subnet mask
Gateway
Set gateway
Trap Addr1
Set trap1
Trap Addr2
Set trap2
Buzzer Switch
Set the switch of beeper
Restore the factory configuration,set content
Restore Factory config
as shown above
xxx= LOLOW:
Very low input optical power alarm
xxx= LOW:
Low input optical power alarm
Input Status: xxx
xxx= HIGH:
High input optical power alarm
Xxx= HIHIGH:
Very high input optical power alarm
xxx= LOLOW:
Very low output optical power alarm
xxx= LOW:
Low output optical power alarm
Output Status: xxx
xxx= HIGH:
High output optical power alarm
Xxx= HIHIGH:
Very High output optical power alarm
xxx= LOLOW:
Very low bias current of pump1 alarm
xxx= LOW:
Low bias current of pump1 alarm
Pump1 Bias: xxx
xxx= HIGH:
High bias current of pump1 alarm
Xxx= HIHIGH:
Very high bias current of pump1 alarm
Set Low Input Threshold
2.Set
Parameters
3.Alarm Status
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Pump1 Temper: xxx
Pump1 Tec: xxx
EDFA Optical Amplifier User Manual
xxx= LOLOW:
Very low temperature of pump1 alarm
xxx= LOW:
Low temperature of pump1 alarm
xxx= HIGH:
High temperature of pump1 alarm
Xxx= HIHIGH:
Very high temperature of pump1 alarm
xxx= LOLOW:
Very low cooling current of pump1 alarm
xxx= LOW:
Low cooling current of pump1 alarm
xxx= HIGH:
High cooling current of pump1 alarm
Xxx= HIHIGH:
Very high cooling current of pump1 alarm
Pump2 Bias: xxx
3.Alarm Status
Pump2 Temper: xxx
Pump2 Tec: xxx
+5V Status: xxx
xxx= LOLOW:
Very low bias current of pump2 alarm
xxx= LOW:
Low bias current of pump2 alarm
xxx= HIGH:
High bias current of pump2 alarm
Xxx= HIHIGH:
Very high bias current of pump2 alarm
xxx= LOLOW:
Very low temperature of pump2 alarm
xxx= LOW:
Low temperature of pump2 alarm
xxx= HIGH:
High temperature of pump2 alarm
Xxx= HIHIGH:
Very high temperature of pump2 alarm
xxx= LOLOW:
Very low cooling current of pump2 alarm
xxx= LOW:
Low cooling current of pump2 alarm
xxx= HIGH:
High cooling current of pump2 alarm
Xxx= HIHIGH:
Very high cooling current of pump2 alarm
xxx= LOLOW:
Very low +5V DC power supply alarm
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-5V Status: xxx
Device Temper: xxx
EDFA Optical Amplifier User Manual
xxx= LOW:
Low +5V DC power supply alarm
xxx= HIGH:
High +5V DC power supply alarm
Xxx= HIHIGH:
Very high +5V DC power supply alarm
xxx= LOLOW:
Very low -5V DC power supply alarm
xxx= LOW:
Low -5V DC power supply alarm
xxx= HIGH:
High -5V DC power supply alarm
Xxx= HIHIGH:
Very high -5V DC power supply alarm
xxx= LOLOW:
Very low chassis temperature alarm
xxx= LOW:
Low chassis temperature alarm
xxx= HIGH:
High chassis temperature alarm
xxx= HIHIGH:
Very high chassis temperature alarm
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6. Installation debugging
6.1 Unpack and Check
1. Insure the package is not defaced. If it has any damage or water mark, please
contact local agency or carrier.
2. After unpacking, check equipments and accessories according to package list. Any
question, please contact local agency or our company.
3. If you think the equipment has been damaged, please don't electrify to avoid
worse damage. Please contact local agency or our company in time.
6.2 Instruments and Tools
1.
2.
3.
4.
An optical power meter;
A digital multimeter;
A standard optical fiber test jumper (FC/APC or SC/APC);
Some absolute alcohol and medical cotton wool.
6.3 Installation Steps
1. Before installing the equipment, please read the <User's manual> carefully and
install the equipment according to the <User's manual>. Note: For the man-made
damage and other all consequence caused by error installation that not according
to the <User's manual>, we will not be responsible and will not supply free
warranty.
2. Take out the device from the box; fix it to the rack and reliably grounding. (The
grounding resistance must be < 4Ω).
3. Use the digital multimeter to check the supply voltage, make sure the supply
voltage comply with the requirements and the switch key is on the “OFF”
position. Then connect the power supply.
4. Input the optical signal according to the display message. Turn the switch key to
the “ON” position and observe the front panel LED status. After the pump
working status indicator turn into green, the device is working normal. Then press
the menu button on the front panel to check the working parameters.
5. Connect the optical power meter to the optical signal output end by the standard
optical fiber test jumper, then measure the optical output power. Affirm the
measured optical output power and the displayed power are the same and have
reached the nominal value. (Affirm the optical power meter is on 1550nm
wavelength test position; the optical fiber test jumper is the matched one and on
the connector surface has no pollution.) Remove the standard optical fiber test
jumper and optical power meter; connect the device to the network. So far, the
device has been completely installed and debugged.
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Special notice: If the equipment has been maintained by users, we will not responsible
free maintenance. We will ask suitable maintenance cost and material cost.
7. Clean and maintenance method of the optical fiber active
connector
In many times, we consider the decline of the optical power as the equipment
faults, but actually it may be caused by that the optical fiber connector was polluted
by dust or dirt. Inspect the fiber connector, component, or bulkhead with a fiberscope.
If the connector is dirty, clean it with a cleaning technique following these steps:
1. Turn off the device power supply and carefully pull off the optical fiber connector
from the adapter.
2. Wash carefully with good quality lens wiping paper and medical absorbent
alcohol cotton. If use the medical absorbent alcohol cotton, still need to wait 1~2
minutes after wash, let the connector surface dry in the air.
3. Cleaned optical connector should be connected to optical power meter to measure
optical output power to affirm whether it has been cleaned up.
4. When connect the cleaned optical connector back to adapter, should notice to
make force appropriate to avoid china tube in the adapter crack.
5. If the optical output power is not normal after cleaning, should pull off the
adapter and clean the other connector. If the optical power still low after cleaning,
the adapter may be polluted, clean it. (Note: Be carefully when pull off the
adapter to avoid hurting inside fiber.)
6. Use compressed air or degrease alcohol cotton to wash the adapter carefully.
When use compressed air, the muzzle aims at china tube of the adapter, clean the
china tube with compressed air. When use degrease alcohol cotton, insert
directions need be consistent, otherwise can’t reach a good clean effect.
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Special notice:
a. In the process of clean the active optical fiber connector, you should avoid
direct shining at eye, which will cause permanence burn!!!!
b. Use proper energy to install the active optical connector, or the ceramic tape
in the adaptor will lead to break. Once the ceramic tape is broken, the
optical output power will decrease rapidly. And turn the active optical fiber
connector slightly, the optical output power changes obviously.
c. Please operate the optical fiber under the condition of shut off the pump
laser. Or the high output power will lead to burn the joint of the optical
output fiber, which will cause the output power decrease.
Equipment changes result in some parts does not match with this manual, without prior
notice.
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Safety Instructions
Read before operating equipment.
1. Cleaning - Unplug this product from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a damp
cloth for cleaning.
2. Power Sources - Use supplied or equivalent UL/CSA approved low voltage DC plug-in transformer.
3. Outdoor Antenna Grounding - If you connect an outside antenna or cable system to the product, be sure the antenna or cable
system is grounded so as to provide some protection against voltage surges and built-up static charges. Section 810 of the
National Electrical Code, ANSI/NFPA No. 70, provides information with respect to proper grounding of the mast and supporting
structure, grounding of the lead-in wire to an antenna discharge unit, size of grounding conductors, location of antenna
discharge unit, connection to grounding electrodes, and requirements for the grounding electrode.
4. Lightning - Avoid installation or reconfiguration of wiring during lightning activity.
5. Power Lines - Do not locate an outside antenna system near overhead power lines or other electric light or power circuits or where
it can fall into such power lines or circuits. When installing an outside antenna system, refrain from touching such power lines or
circuits, as contact with them might be fatal.
6. Overloading - Do not overload wall outlets and extension cords as this can result in a risk of fire or electric shock.
7. Object and Liquid Entry - Never push objects of any kind into this product through openings as they may touch dangerous voltage
points or short out parts, resulting in a fire or electric shock. Never spill liquid of any kind on the product.
8. Servicing - Do not attempt to service this product yourself as opening or removing covers may expose you to dangerous voltage or
other hazards. Refer all servicing to qualified service personnel.
9. Damage Requiring Service - Unplug this product from the wall outlet and refer servicing to qualified service personnel under the
following conditions:

When the power supply cord or plug is damaged.

If liquid spills or objects fall into the product.

If the product is exposed to rain or water.

If the product does not operate normally by following the operating instructions. Adjust only those controls that are
covered by the operating instructions. An improper adjustment of other controls may result in damage and will often
require extensive work by a qualified technician to restore the product to its normal operation.

If the video product is dropped or the cabinet is damaged.

When the video product exhibits a distinct change in performance, this indicates a need for service.
This unit outputs continuous invisible light, which may
beharmful to the eyes; use with caution. For additional
safety, plug the attached dust caps into the optical
transceivers when the fiber optic cable is unplugged.
Direct viewing into optical connectors should be avoided
at all times!
WARNING !
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