Specifications

2-2
Cisco ONS 15216 EDFA2 Operations Guide
78-13908-02
Chapter 2 Technical Specifications
Optical Specifications
Maximum Input Power
The ONS 15216 EDFA2 is designed to operate at a gain setting between 13 and 22 dB. Each gain setting
has a maximum input power. The maximum input power is defined as the output power, 17 dBm, minus
the gain setting. For example at a gain setting of 22 dB, the maximum input power is –5 dBm. Prolonged
operation beyond the maximum input power can shorten the life of the ONS 15216 EDFA2.
Use of optical attenuators is required to bring total input power to less than the maximum input power
when operating in constant gain mode.
Upgrading from a Single Channel to the Maximum Number of Channels
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 Table 2-3. For example, if the maximum number of channels at
full loading is 18 dBm and the gain is set to 22 dBm, the maximum per channel power is –17.6 dBm.
Use Table 2-3 to calculate per-channel power as a function of the maximum total number of channels at
full loading. Contact Cisco TAC with any questions or concerns regarding maximum input power or
setting the upgrade path.
Polarization sensitivity < 0.5 dB
Automatic gain control (AGC) The ONS 15216 EDFA2 contains an active gain block with
an automatic gain control loop to minimize the effects of
output power variations per wavelength upon adding or
deleting wavelengths on the same DWDM ring.
Table 2-1 ONS 15216 EDFA2 Optical Specifications (continued)
Requirement Specification
Table 2-2 Channel Power (Gain = 13 dBm)
43210-1-2-3-4-5
Number of
Channels
at Full
Loading Maximum Power per Channel at Gain Setting (units measured in dBm)
1 4.0 3.0 2.0 1.0 0.0 -1.0 -2.0 -3.0 -4.0 -5.0
2 1.0 0.0 -1.0 -2.0 -3.0 -4.0 -5.0 -6.0 -7.0 -8.0
3 -0.8 -1.8 -2.8 -3.8 -4.8 -5.8 -6.8 -7.8 -8.8 -9.8
4 -2.0 -3.0 -4.0 -5.0 -6.0 -7.0 -8.0 -9.0 -10.0 -11.0
5 -3.0 -4.0 -5.0 -6.0 -7.0 -8.0 -9.0 -10.0 -11.0 -12.0
6 -3.8 -4.8 -5.8 -6.8 -7.8 -8.8 -9.8 -10.8 -11.8 -12.8
7 -4.5 -5.5 -6.5 -7.5 -8.5 -9.5 -10.5 -11.5 -12.5 -13.5
8 -5.0 -6.0 -7.0 -8.0 -9.0 -10.0 -11.0 -12.0 -13.0 -14.0
9 -5.5 -6.5 -7.5 -8.5 -9.5 -10.5 -11.5 -12.5 -13.5 -14.5