[paddington]

What you have there doesn't show anything regarding lossy compression one way or the other. We can only guess with that. We'd need to see a 2-3 sec slice on the SA to view the blocks that are removed by the lossy data compression (if there are any).

What is DOES show, in #2, is an FM radio stereo pilot tone (19kHz) which could also explain the abrupt cut, depending on how it has been processed, post-receiver.

Also, in #3, the noise slightly below 16kHz is the flyback in a CRT video display that was likely picked up during analog recording or dubbing. Very common.