Ntp- G56 Verify The Osnr - Cisco ONS 15454 DWDM Installation And Operation Manual

NTP-G56 Verify the OSNR
d.
Click OK.
Step 6
If you provisioned a patchcord on a port in a 1+1 protection group, a dialog box appears to ask if you
Step 7
would like to provision the peer patchcord. Click Yes. Repeat Steps
Step 8 Return to your originating procedure (NTP).
NTP-G56 Verify the OSNR
Purpose
Tools/Equipment
Prerequisite Procedures
Required/As Needed
Onsite/Remote
Security Level
Complete the
Step 1
Using an optical spectrum analyzer, check the received OSNR for each transmitted channel on both ends
Step 2
of the span. Identify the last OSC-CSM, OPT-PRE, or OPT-BST MON port that the channel passes
through before the channel is dropped. If OPT-PRE cards are installed with an OPT-BST or OSC-CSM
card, use the OPT-PRE MON port.
If the OSNR is too low, check the following, depending on your node configuration:
Step 3
Note
•
•
•
•
If the OSNR is still too low, contact your next level of support.
Repeat Steps
Step 4
Stop. You have completed this procedure.
Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
6-12
Click the desired termination slot/port from the list of available slots/ports.
This procedure verifies the optical signal-to-noise ratio (OSNR). The
OSNR is the ratio between the signal power level and the noise power level.
Optical spectrum analyzer
DLP-G46 Log into CTC, page 2-25
As needed
Onsite
Provisioning or higher
"DLP-G46 Log into CTC" task on page 2-25
For OSNR values for each card class, refer to
Note
The purpose of this step is not to improve the signal-to-noise ratio (SNR), but to match the
per-channel power level within the RX port power range.
Check the fiber connections between the OPT-BST or OSC-CSM and the OPT-PRE amplifier. If
needed, clean the connectors. See the
page 13-25.
On the near-end OPT-BST amplifier, check the equalization of the added channels at the monitor
output.
On the OPT-PRE amplifier, check the output power on both COM TX and DC TX ports.
On the far-end OPT-PRE amplifier, check the amplifier gain tilt at the monitor output.
2 and 3 for all traffic in the network.
at an ONS 15454 on the network.
Chapter 16, "Card Reference."
"NTP-G115 Clean Fiber Connectors" procedure on
Chapter 6 Turn Up Network
3 through 6.
September 2005