People say you should use the MinTX when calculating loss budget, if so, what is the Max TX used for? The QSFP-40G-ER4 has a MaxTX of 4.5, but a MinTX of -2.7. Can I use the MaxTX of 4.5 & MaxRX of -21.2 to create a loss budget of -25.7? or is this b...