7-66
Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Chapter 7 Reconfigurable Optical Add/Drop Cards
7.12.3 40-WXC-C Power Monitoring
Figure 7-34 40-WXC-C Optical Module Functional Block Diagram
Note The Optical Power Monitoring (OPM) device works at per channel level and reports ADD or EXP per
channel power according to the switch position.
7.12.3 40-WXC-C Power Monitoring
The 40-WXC-C has 83 physical diodes (P1 through P40) that monitor power at the outputs of the card.
Table 7-37 describes the physical diodes.
WXC optical module
159395
uP8260
COM
TX
OPM
P...P
FPGA
For SCL Bus
management
2xSCL Buses
DC/DC
Power supply
Input filters
BAT A&B
ADD RX
LC connector
MPO connector
COM
RX
DROP TX
70/30
EXPRESS
RX
EXPRESS
TX
VPD2
Virtual
photodiode
PDi3
PDi4
P5
P1
Virtual photodiode
VPD1
Table 7-37 40-WXC-C Physical Photodiode Port Calibration
Physical
Photodiode CTC Type Name Calibrated to Port(s)
P1 DROP DROP TX
P2 EXP EXP RX
PDi3
1
RX Add i RX ports (that is,
channel input Add i RX
power), up to 40 ports and
therefore 40 PDs
1