4-9
Cisco ONS 15200 Installation, Setup, and Test Manual
78-13765-01
Chapter 4 Turn Up and Test
Figure 4-3
Attenuators from the A Side and B Side Line modules
Step 6
Retrieve the DWDM receive level:
a.
At the NCB:> prompt, type
show power
. Press Enter. This retrieves the measured optical power
levels from the DWDM receivers. Record the values in
b.
Calculate the expected receive power on the A and B sides and record the values in
To calculate the expected receive power, take the measured attenuated transmit power from
and subtract the associated losses from the dropping of the channel (see the
formula and explanation below). The actual receive power should be
±
2.5 dB of the expected
receive power.
Formula:
ERp = MTp – (HFM x 0.5 – 2.5)
MONITOR
MONITOR
A-side
B-side
ETHER
IrDA
Network
Control
Board
MMC
ACO
INT
BUS
MA
Attenuation
Attenuation
61135
¬