Cisco ONS 15454 DWDM - Page 504

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Cisco ONS 15454 DWDM Reference Manual, R8.5
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Chapter 10 Network Reference
10.8.2 System Level Gain Tilt Control
Figure 10-22 System Tilt Compensation Without an ROADM Node
The proper Tilt Reference value is calculated by Cisco TransportPlanner and inserted in the Installation
Parameter List imported during the node turn-up process (see the “Turn Up a Node” chapter in the
Cisco ONS 15454 DWDM Procedure Guide). For both OPT-PRE and OPT-BST cards, the provisionable
Gain Tilt Reference range is between –3 dB and +3 dB.
During the ANS procedure, the Tilt value for the OPT-BST or OPT-PRE card is provisioned by the
TCC2/TCC2P card (see Figure 10-23). The provisioned Tilt Reference Value is reported in the CTC
OPT-PRE or OPT-BST card view (in the Provisioning > Opt. Ampli. Line > Parameters > Tilt Reference
tab).
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
=