otc101703 optix bws 320g v200r001 system commission issue1.1
TRANSCRIPT
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System commissioning
1.Optical power adjustment
2.commissioning skills
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Optical power adjustment
• Master signal flow
• Familiar with some reference points
• Classification of Attenuator
• Power adjustment
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Signal Flow (1)
M
16
D
16
TWC
TWC
RWC
RWC
S
C
A
SCC
OHP
SC1
WBA
WPA
RWC
TWC
OTM
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Signal Flow (2)
OLA
S
C
A
SCC
OHP
SC2
WBA WPA
S
C
A
WPA WBA
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Important reference point
M16
OTU
OTU
OTU
SCA
SCC
OHP
SC1
WBA
WPA M16
D16
OTU
OTU
OTU
OTU
OTU
SCA
SCC
OHP
SC1
WBA
WPASCC
OHP
SC2
WPA WBA
SCA
SCA
OTU
O L A O T M
M16
D16
OTU
OTU
OTU
OTU
OTU
OTU
SCA
SCC
OHP
SC1
WBA
WPA M16
D16
OTU
OTU
OTU
OTU
OTU
SCA
SCC
OHP
SC1
WBA
WPASCC
OHP
SC2
WBA WPA
WPA WBA
SCA
SCA
OTU
O T M O L A O T M
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• Transmission SideSDH——TWC(LWC)
M16(IN)
M16 ——WBA
• Receiving SideSCA ——WPA
D16 ——RWC(LWC)
Important section
• OLA SideSCA——WPA(WLA)
WPA ——WBA
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Classification of Attenuator
1,Fixed optical attenuator
5dB 10dB 15dB
2,Variable optical attenuator
1.5~30dB
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Power adjustment
OTM
TO
RI
TWC
RWC
D16
M16
WBA
WPA
SC1
S
C
A
TM
RM
MON
MON
MON
SDH Tx
SDH Rx
RO
TI1
2
3
4
1,2
Fixed attenuator
3,4
Variable Attenuator
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Power adjustment(1)
1 Adjustment of fixed attenuator
It depends on the following factors
a.mean launched power of SDH transmitter
b.receiver type of OTU(TWC/LWC)
c. mean launched power of OTU(RWC/LWC) transmitter
d.type of SDH receiver unit
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2 Installation of fixed attenuator
a.ODF frame provided by customer indirectly
b.upper ODF of DWDM equipment(seldom)
Installation in middle(lower) ODF is forbidden
Power adjustment(1)
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Power adjustment(2)
1,Adjustment of variable attenuator
a.installed before OA to adjust optical power
b.location of variable attenuator(corresponding to OAs)
c.adjust optical power according to :
WBA01 : -18+10*lg(N)(dBm)
WPA01 : -28+10*lg(N)(dBm)
N:number of channels
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2,Notice items during commissioning
a.perform system commissioning with one channel :
input of WBA01:-18dBm WPA01:-28dBm
b.forbidden to increase optical power(OSNR) too much,or else it will be difficult to upgrade
Power adjustment(2)
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Min.Input power(1 channel)
Max.Input power(1 channel)
Gain(dB)
WBA01 -20dBm -6dBm 23
WBA03 -17dBm -3dBm 23
WPA01 -28dBm -13dBm 23
WLA05 -28dBm -13dBm 30/33
Power Types of OA
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Power adjustment(3)
commissioning of M16 input port
a.balance of each channel power(usually it’s not necessary)
b. Be careful about :
output power of TWC(LWC)(common value:-1.5dBm~-2dBm, regardless open or integrated system
Esp.in integrated system,adjust SDH output power with attenuator to -2dBm nearly.
Keep the balance of optical power before M16
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Similarly:
a.adjust the balance before the input of M16
b.adjust optical power to:
-18dBm+10*lg(N) WBA01
-28dBm+10*lg(N) WPA01
commissioning of OLA /OADM/REG
Power adjustment(4)
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Look for “optical power” in DWDM system
a.with ouput optical power of TWC/LWC
b.with ouput optical power of SC1/2
Keep fibre and connector clear please
commissioning skills
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At transmission side,power of noise can be neglected .
But in practical network,noise will be accumulated and amplified,So at receiver side,power of noise cannot be neglected.
In system commissioning,in some corresponding points(eg. WLA/WPA),it should reserve redundance(adjust with optical power meter and NMS)
NOTE:consider 1dB about 1 WPA/WLA,and OSA is recommended in system commissioning
commissioning skills
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1.Directly connect MON ports of M16/M32 、 D16/
D32 、 WBA 、 WPA to IN port of MS1/2 for on-line
optical spectral monitoring.2.In DWDM system,we mainly consider OSNR at receiver side instead of transmitter side.
Receiver side :OSNR>20dB
Connection of MS1/2
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Extend ECC communication
It also can implemented by Ethernet connection.
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A£ BB£
remote side
receive or transmit
n
n£¬wavelength NO.n
1 At client side(eg.SDH service)
ABB
remote side
receive or transmit
2 At fibre line side
Fibre identifier
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WPA WBA
OTU OTU
M
R
2
M
R
2
MO
MI
1 2
Variable attenuators(1&2) are flexibly installed to meet the requirement of system power flatness.
At dropping direction,fixed attenuator is installed,at adding direction,variable attenuator is installed.
commissioning of MR2
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NM monitoring principle:
Connect all Ethernet ports of sub-racks to a
HUB,or connect all BNC ports with a cascading
cable(concatenation).
The common HUB has 8 ports 。
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WBA
RX
TX
RX
TX
WPA
RX
TX
RX
TX
WBA
WPA
AB
Protection pair between WBA&WPA of A and B.if the fibre form A to B is broken, WBA of B will shut off the laser(after detecting of R-LOS on WPA),so WPA of A will occur R - LOS, WBA of A will shut off the laser.
APR function-for security
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Thanks
Very much !
Troubleshooting