Cisco ONS 15454 DWDM - Figure 18-16 System Tilt Compensation Without a ROADM

18-32
Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
August 2005
Chapter 18 Network Reference
18.8.2 System Level Gain Tilt Control
Figure 18-16 System Tilt Compensation Without a ROADM
The proper Tilt Reference value is calculated by MetroPlanner and inserted in the Installation Parameter
List imported during the Node Turn-Up procedure (see “NTP-G138 Import a Cisco MetroPlanner
Configuration File” task on page 3-82). For both OPT-PRE and OPT-BST/OPT-BST-E cards, the
provisionable Gain Tilt Reference range is between –3 dB and +3 dB.
During the Automatic Node Setup (ANS) procedure, the Tilt value for the OPT-BST/OPT-BST-E or
OPT-PRE card is provisioned by the TCC card (see Figure 18-17). The provisioned Tilt Reference Value
is reported in the CTC OPT-PRE or OPT-BST/OPT-BST-E card view (Provisioning > Opt.Ampli.Line >
Parameters > Tilt Reference).
OPT-BSTOPT-BST
G
OPT-PRE
> 21dB
Unregulated Tilt
SPAN 1 = 25 dB SPAN 2 = 15 dB
OPT-PREOPT-PRE
DCU
Tilt Reference
0
Provisioned Tilt
134396
=