ImpairmentsClick

Which descriptors a threshold detector reads, and one reason per mechanism for each it does not

9/9 passed in 182ms

Test	What it does	Result
test_background_floors	A coexisting channel and a Rayleigh return each raise the click floor and so the QBER, less through a narrower passband and more at a stronger launch.	✅ pass
test_background_stated	A coexisting channel without q.ClickDetector(passband=...) is refused naming the field, and a background over a bare transmittance is refused for want of a fibre length.	✅ pass
test_demux_apart	The click route refuses a demultiplexer share as a loss on Bob's receive chain.	✅ pass
test_extinction_charged	An extinction ratio dilutes a basis-keyed link's misalignment by 4/(r+3) exactly as impairments.extinction does, keeps misalign_optics apart, and costs QBER and rate.	✅ pass
test_extinction_sampled	The same extinction dilution costs QBER and rate on the sampled pulse train.	✅ pass
test_fields_apart	A quadrature link refuses a q.Modulator extinction ratio and a click link its ratio and angle, each by name, and a click link refuses a q.Modulator with no extinction.	✅ pass
test_four_paths	The 4 of 4/(r+3) counts four transmitter paths, so six-state and DPS refuse an extinction ratio by name and COW refuses it as declared twice.	✅ pass
test_quadrature_reasons	A quadrature link refuses q.Backflash and q.DeadTime as having no Gaussian-modulation term, in the message the guide prints.	✅ pass
test_reasons_apart	A click link refuses q.Dephasing, q.Polarisation and q.Timing each with its own reason; the q.Dephasing message is the one the guide prints.	✅ pass