I'm curious about two types of transmissions from aircrafts:
1. squawk transponder Mode-C Secondary Surveillance Radar (SSR) or whatever
2. ACARS

I know ACARS is around 131 Mkz usually, but what frequency is the SSR stuff?

What would they sound like on a scanner? Does ACARS sound indeed like
a short bird squawk, listening in AM mode? I will attempt to decode it
with acarsd.org's Linux program.

How about VOR's, ~110-115 Mhz, listening in AM mode? My squelch opens
up but all I hear is silence, correct?

What does TACAN sound like?

Describe them, don't just refer me to some sound files that are too
big for little me to download.

P.S. CW means Morse code, but what about the CWP seen on aviation
maps' frequency tables, does it just mean the same?