Cisco ONS 15454 DWDM - Power Monitoring

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Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
April 2006
Chapter 16 Card Reference
16.5.1 OPT-PRE Amplifier
Figure 16-16 OPT-PRE Block Diagram
Figure 16-17 shows the OPT-PRE optical module functional block diagram.
Figure 16-17 OPT-PRE Optical Module Functional Block Diagram
16.5.1.1 Power Monitoring
Physical photodiodes P1, P2, P3, and P4 monitor the power for the OPT-PRE card. The returned power
level values are calibrated to the ports as shown in Table 16-20.
Optical
module
COM RX
DC RX
96478
Processor
DC TX
COM TX
MON
FPGA
For SCL Bus
management
SCL Bus
TCCi M
SCL Bus
TCCi P
DC/DC
Power supply
Input filters
BAT A&B
98298
DCU
COM RX COM TX
DC RXDC TX
MON
P1 P2 P3 P4
P
Physical photodiode
Variable optical attenuator
Table 16-20 OPT-PRE Port Calibration
Photodiode CTC Type Name Calibrated to Port
P1 Input Com COM RX
P2 Output DC DC TX
P3 Input DC DC RX
P4 Output COM (Total Output) COM TX
Output COM (Signal Output)