The value of '/instrumentation/nav/signal-quality-norm' should show the input strength of radio signal.
If i switch the frequency on nav from a nearly station to a frequency where no station is sending,
the 'signal-quality-norm' is inertial and take 2 or more seconds to fall from 1.0 to 0.0.
Imagine i take a FM radio with 2 programmed frequencies and i switch from a frequency with
local radio broadcast to the another frequency where no broadcaster is sending, i hear immediately noise.
This means the signal strength drop immediately to 0.
It looks like the '/instrumentation/nav/in-range' change the state if the 'signal-quality-norm' is below a certain value.
So it takes 2 or more seconds until the 'in-range' change the state.
Also the most other values in '/instrumentation/nav/' will be calculated.
This lead us too radio equipment (like RMI, HSI and so on) that point to stations that the equipment normaly has never heared.
Also the '/instrumentation/nav/heading-needle-deflection' looks like a inertial value.
Why isn't this value immediately droped to zero? If everyone has a mechanical gauge (like the glide sloop indicator) where the pointers
should slowly change, that he/she can write a filter for it.
I think that the values that was delivered from FG should allways reflect the real and actual values.