Softel SR1002 Mini FTTH User manual

SR1002 Mini FTTH
Optical Receiver Manual
HANGZHOU SOFTEL OPTIC CO., LTD
2016.05

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SR1002
SR1002
SR1002 Optical
Optical
Optical Receiver
Receiver
Receiver Manual
Manual
Manual
1. Product Summary
SR1002 optical receiver is our latest 1GHz FTTB bidirectional optical receiver. With wide range receiving
optical power, high output level, low power consumption. It is the ideal equipment to build the
high-performance NGB network.
2. Performance Characteristics
Adopt advanced optical AGC technique, optical AGC control range: +2dBm ～-9/-8/-7/-6/-5/-4dBm
adjustable;
Forward working frequency extended to 1GHz, RF amplifier part adopts the high performance low power
consumption GaAs chip, the maximum output level up to 106dBuv;
EQ and ATT both use the professional electric control circuit, make the control more accurate, operation
more convenient;
Built-in the standard II class network management responder, support remote network management
(optional);
With compact structure, convenient installation, it is the first choice equipment of FTTB CATV network;
Built-in high reliability low power consumption power supply;
3. Technique Parameter
Item
Unit
Technical Parameters
Optical Parameters
Receiving Optical Power
dBm
-9 ~ +2
Optical AGC Range
dBm
+2 ～-9/-8/-7/-6/-5/-4 (adjustable)
Optical Return Loss
dB
>45
Optical Receiving Wavelength
nm
1100 ~ 1600
Optical Connector Type
SC/APC or specified by the user
Fiber Type
Single mode
Link performance
C/N
dB
≥ 51
Note1
C/CTB
dB
≥ 60
C/CSO
dB
≥ 60
RF Parameters
Frequency Range
MHz
45/87 ~862/1003
Flatness in Band
dB
±0.75
FZ110 output
FP204 output
Rated Output Level
dBμV
≥ 108
≥ 104
Max Output Level
dBμV
≥ 108 (-9 ~ +2dBm
Optical power receiving)
≥ 104 (-9 ~ +2dBm
Optical power receiving)
≥ 112 (-7 ~ +2dBm
Optical power receiving)
≥ 108 (-7 ~ +2dBm
Optical power receiving)
Output Return Loss
dB
≥16
Output Impedance
Ω
75
Electrical control EQ range
dB
0～15
Electrical control ATT range
dBμV
0～15

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SR1002
SR1002
SR1002 Optical
Optical
Optical Receiver
Receiver
Receiver Manual
Manual
Manual
Optical Parameters
Optical Emission Wavelength
nm
1310±10, 1550±10 or specified by the user
Output Optical Power
mW
1 (or specified by the user)
Optical Connector Type
SC/APC
RF Parameters
Frequency Range
MHz
5 ~ 65 (or specified by the user)
Flatness In Band
dB
±1
Input Level
dBμV
75 ~85 (Rated input level 79)
Output Impedance
Ω
75
NPR dynamic range
dB
≥15（NPR≥30 dB）
Use DFB laser
≥10（NPR≥30 dB）
Use FP laser
General Characteristics
Power Voltage
V
AC（150~265）V or DC 12V
Operating Temperature
℃
-30~60
Storage Temperature
℃
-40~65
Relative Humidity
%
Max 95% No Condensation
Consumption
VA
≤9
Dimension
mm
190（L）* 110（W）* 52（H）
Note 1: Configure 59 PAL-D analog channel signals at the 550MHz frequency range. Transmit digital
signal at the frequency range of 550 ～862/1003MHz. The digital signal level (in 8MHz bandwidth) is
10dB lower than analog signal carrier level. When the input optical power of the optical receiver is -1dBm,
the output level: 108dBμV, EQ: 8dB.
4. Block Diagram
SR1002 with II class network management transponder, FZ110 (tap) output block diagram

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SR1002
SR1002
SR1002 Optical
Optical
Optical Receiver
Receiver
Receiver Manual
Manual
Manual
SR1002 with II class network management transponder, FP204 (two-way splitter) output
block diagram
SR1002 without network management transponder, FZ110 (tap) output block diagram
SR1002 without network management transponder, FP204 (two-way splitter) output block
diagram
5. Relation Table of Input Optical Power and CNR

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SR1002
SR1002
SR1002 Optical
Optical
Optical Receiver
Receiver
Receiver Manual
Manual
Manual
6. Function Display and Operating Instruction
Mode: Mode selection button, total eleven modes. Press the mode selection button to
enter the corresponding status display, eleven modes to cycle.
The following is the detailed instructions：

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SR1002
SR1002
SR1002 Optical
Optical
Optical Receiver
Receiver
Receiver Manual
Manual
Manual

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SR1002
SR1002
SR1002 Optical
Optical
Optical Receiver
Receiver
Receiver Manual
Manual
Manual
7. Structure Description
1
LED digital display tube
2
Mode key
3
Up key
4
Down key
5
Optical receiving port
6
Optical output port
7
Network management
RJ45 interface
8
Output 2
9
Output 1
10
Power input
1
2
3
4
5
6
7
8
9
10

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SR1002
SR1002
SR1002 Optical
Optical
Optical Receiver
Receiver
Receiver Manual
Manual
Manual
8. NMS setup instructions
If users configured the network management responder, need to do the following settings:
Responder IP setup instruction:
Network management directly modify:
1. Default IP is 192.168.1.168 ，default gateway is 192.168.1.1 ，default subnet mask is
255.255.255.0
2. Connect the computer and responder (can be direct connected), and change the computer IP
to 192.168.1.XXX (XXX is any number from 0 to 255 except 168); start upper computer network
management software, then search the device and log in.
3. Right-click device icon and choose modify the device IP.
4. Enter new IP address, gateway and subnet mask.
5. Click modify，then exit, it is done. There will show new IP address and gateway on operational
logbook.
6. Reboot the responder, the new IP take effect (Click the reboot button in the network
management software or power on again)
9. Common Failure Analysis and Troubleshooting

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SR1002
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SR1002 Optical
Optical
Optical Receiver
Receiver
Receiver Manual
Manual
Manual
Failure phenomenon
Failure cause
Solution
After connecting the
network, the image of the
optical contact point has
obvious netlike curve or
large particles highlights
but the image background
is clean.
1. The input optical power of the
optical receiver is too high, make the
output level of the optical receiver
module too high and RF signal index
deteriorate.
2. The RF signal (input the optical
transmitter) index is poor.
1. Check the input optical power and make
appropriate adjustments to make it in the
specified range; or adjust the attenuation of
optical receiver to reduce the output level and
improve index.
2. Check the front end machine room optical
transmitter RF signal index and make
appropriate adjustments.
After connecting the
network, the image of the
optical contact point has
obvious noises.
1. The input optical power of the
optical receiver is not high enough,
results in the decrease of C/N.
2. The optical fiber active connector
or adapter of the optical receiver has
been polluted.
3. The RF signal level input the
optical transmitter is too low, make
modulation degree of the laser is not
enough.
4. The C/N index of system link
signal is too low.
1. Check the received optical power of the
optical contact point and make appropriate
adjustments to make it in the specified range.
2. Recover the received optical power of the
optical contact point by cleaning the optical
fiber connector or adapter etc methods.
Specific operation methods see “Clean and
maintenance method of the optical fiber
active connector”.
3. Check the RF signal level input the optical
transmitter and adjust to the required input
range. (When the input channels number less
than 15, should higher than nominal value.)
4. Use a spectrum analyzer to check the
system link C/N and make appropriate
adjustments. Make sure the system link signal
C/N﹥51dB.
After connecting the
network, the images of
several optical contact
points randomly appear
obvious noises or bright
traces.
The optical contact point has open
circuit signal interference or strong
interference signal intrusion.
1. Check if there is strong interference signal
source; change the optical contact point
location if possible to avoid the influence of
strong interference signal source.
2. Check the cable lines of the optical contact
point, if there is shielding net or situation that
the RF connector shielding effect is not good.
3. Tightly closed the equipment enclosure to
ensure the shielding effect; if possible add
shielding cover to the optical contact point
and reliable grounding.
After connecting the
network, the images of
several optical contact
points appear one or two
horizontal bright traces.
Power supply AC ripple interference
because of the bad earth of equipment
or power supply.
Check grounding situation of the equipment,
make sure that every equipment in the line
has been reliably grounding and the
grounding resistance must be﹤4Ω.

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SR1002
SR1002
SR1002 Optical
Optical
Optical Receiver
Receiver
Receiver Manual
Manual
Manual
After connecting the
network, the received
optical power of the optical
contact point is unstable
and has large continuous
change. The output RF
signal is unstable, too. But
the detected output optical
power of the optical
transmitter is normal.
The optical fiber active connector
types do not match, maybe the APC
type connect to PC type, make the
optical signal cannot normal
transmission.
The optical fiber active connector or
adapter may be polluted seriously or
the adapter has been damaged.
1. Check the type of optical fiber active
connector and adopt the APC type optical
fiber active connector to ensure the normal
transmission of optical signal.
2. Clean the polluted optical fiber active
connector or adapter. Specific operation
methods see “Clean and maintenance method
of the optical fiber active connector”.
3. Replace the damaged adapter.
10. Clean and maintenance method of the optical fiber active connector
In many times, we misjudge the decline of the optical power or the reduce of optical receiver output
level as the equipment faults, but actually it may be caused by the incorrect connection of the optical
fiber connector or the optical fiber connector has been polluted by the dust or dirt.
Now introduce some common clean and maintenance methods of the optical fiber active connector.
1. Carefully pull off the optical fiber active connector from the adapter. The optical fiber active
connector should not aim at the human body or the naked eyes to avoid accidental injury.
2. Wash carefully with good quality lens wiping paper or medical degrease alcohol cotton. If use the
medical degrease alcohol cotton, still need to wait 1~2 minutes after wash, let the connector surface
dry in the air.
3. The cleaned optical fiber active connector should be connected to optical power meter to measure
output optical power to affirm whether it has been cleaned up.
4. When connect the cleaned optical fiber active connector back to adapter, should notice to make the
force appropriate to avoid the ceramic tube in the adapter crack.
5. If the output optical 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 the dedicated compressed air or degrease alcohol cotton bar to clean the adapter. When use
the compressed air, the muzzle of the compressed air tank should aims at the ceramic tube of the
adapter, clean the ceramic tube with compressed air. When use degrease alcohol cotton bar,
carefully insert the alcohol cotton bar into the ceramic tube to clean. The insert direction should be
consistent, otherwise can not reach ideal cleaning effect.