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The NF calculated by the preamp model is compliant with the MW-MW noise mask in the OpenROADM MSA spec. The booster is noise-free, which is modeled by setting the NF to zero (-inf in dB units). This is obviously unphysical but it is the simplest way to model the total noise contribution from a ROADM, including preamp and booster, that is compliant with the the OpenROADM MSA. This also introduces two new EDFA type varieties, "openroadm_mw_mw_preamp" and "openroadm_mw_mw_booster" in the equipment library. I would prefer to also change the names of the existing "openroadm" type_def and "standard"/"low_noise" type_variety, representing an OpenROADM inline-amplifier, for better consistency but this probably needs to be discussed first. Signed-off-by: Jonas Mårtensson <jonas.martensson@ri.se> Change-Id: I7344ff53623f166649efb389c95c04ff92718e35 Signed-off-by: Jan Kundrát <jan.kundrat@telecominfraproject.com> Co-authored-by: Jan Kundrát <jan.kundrat@telecominfraproject.com>