Table 2-2 Maximum Channel Power - Cisco 15216 EDFA2 Operation Manual

Optical Specifications
2.1.1 Maximum Input Power
The ONS 15216 EDFA2 operates at a gain setting between 13 and 22 dB. Each gain setting has a
maximum input power. The maximum input power is defined as 17 dBm (the maximum output power)
minus the gain setting. For example, at a gain setting of 22 dB, the maximum input power is –5 dBm. At
a gain setting of 13 dB, the maximum input power is 4 dBm. Prolonged operation beyond the maximum
input power can shorten the life of the ONS 15216 EDFA2.
External optical attenuators are required to reduce the total input power to less than or equal to 4 dBm.
2.1.2 Channel Loading
You can ensure a smooth upgrade path from a single channel to the maximum numbers of channels with
a minimum disruption of service if the per-channel power of the single channel is properly set from the
start. The per-channel power should be set so that at full channel loading, the total input power is less
than the maximum power indicated in
full loading is 18 and the gain is set to 22 dB, the maximum per channel power is –17.6 dBm.
Use
full loading. Contact Cisco TAC with any questions or concerns regarding maximum input power or
setting the upgrade path.
Table 2-2
Composite Input
Power (dBm)
Corresponding
Max. Gain (dB)
Number of
Channels at Full
Loading
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Cisco ONS 15216 EDFA2 Operations Guide
2-2
F I N A L D R A F T - C I S C O C O N F I D E N T I A L
Table 2-2 to calculate per-channel power as a function of the maximum total number of channels at
Maximum Channel Power
4 3
13 14
Maximum per Channel Input Power at Maximum Gain Setting (dBm)
4.0 3.0
1.0 0.0
–0.8 –1.8
–2.0 –3.0
–3.0 –4.0
–3.8 –4.8
–4.5 –5.5
–5.0 –6.0
–5.5 –6.5
–6.0 –7.0
–6.4 –7.4
–6.8 –7.8
–7.1 –8.1
–7.5 –8.5
–7.8 –8.8
Table 2-2. For example, if the maximum number of channels at
2 1 0 –1
15 16 17 18
2.0 1.0 0.0 –1.0
–1.0 –2.0 –3.0 –4.0
–2.8 –3.8 –4.8 –5.8
–4.0 –5.0 –6.0 –7.0
–5.0 –6.0 –7.0 –8.0
–5.8 –6.8 –7.8 –8.8
–6.5 –7.5 –8.5 –9.5
–7.0 –8.0 –9.0 –10.0
–7.5 –8.5 –9.5 –10.5
–8.0 –9.0 –10.0 –11.0
–8.4 –9.4 –10.4 –11.4
–8.8 –9.8 –10.8 –11.8
–9.1 –10.1 –11.1 –12.1
–9.5 –10.5 –11.5 –12.5
–9.8 –10.8 –11.8 –12.8
Chapter 2 Technical Specifications
–2 –3 –4 –5
19 20 21 22
–2.0 –3.0 –4.0 –5.0
–5.0 –6.0 –7.0 –8.0
–6.8 –7.8 –8.8 –9.8
–8.0 –9.0 –10.0 –11.0
–9.0 –10.0 –11.0 –12.0
–9.8 –10.8 –11.8 –12.8
–10.5 –11.5 –12.5 –13.5
–11.0 –12.0 –13.0 –14.0
–11.5 –12.5 –13.5 –14.5
–12.0 –13.0 –14.0 –15.0
–12.4 –13.4 –14.4 –15.4
–12.8 –13.8 –14.8 –15.8
–13.1 –14.1 –15.1 –16.1
–13.5 –14.5 –15.5 –16.5
–13.8 –14.8 –15.8 –16.8
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