Many modulation schemes will not show nicely on a
time domain 'scope - like phase shift keying, you have
the carrier at constant amplitude and only the phase
changes, back and forth, relative to last symbol. Other
denser modulations like QAM change both phase and
amplitude, but you'd have a hard time figuring which
"symbol" is which by eye.
You need the same RX lineup as the host vehicle, most
likely, to be able to get anything sensible; modulations
are not cross- or backward-compatible pretty much.