first, you must know the protocol used by your remote.
second, the remote, don’t send plain signal, but a carrier modulated, with protocol specification, the carrier may vary from 36 to 38 Khz , and the protocol may vary from RC5, to sony to toshiba.
to read the code, you must have a receiver like tsop 1738 (for 38 khz) or 1736 (for 36 khz) that receive and demodulate the signal, taking you a plain signal that you can see whit DSO.
sorry, if this may be inaccurate, but i’m starting to study the ir code now!!!