No one-way approach to learning ir remote control frequencies

[selbstdual]

I still really do not understand exactly what
you want to do but, from a quick look at some of your other posts,
that seems to be an ongoing theme.

I did not notice this sentence.

The Scott DVD Player uses the NEC IR protocol
with a carrier of 38kHz. Scott's custom code is 8. The NEC protocol
is one of the oldest (if not the oldest) IR protocol. It is widely
used by many AV manufacturers and is easily understood. There's a
datasheet for one of the early NEC encoder chips on my webpage at
http://davehouston.net/Nec6121.pdf.

Interesting that no technical manual can be written for a good
understanding. Thank you anyway.

If you want to capture these codes with a PIC,
the best way is to use an IR receiver module which receives the IR,
removes the carrier, and outputs the data envelope. I suggest the
Vishay TSOP1100 which works with 33-57kHz carriers. If you also want
to capture the carrier frequency use a photodiode on another pin and,
if your oscillator is at least 8MHz, use PBP's COUNT for 1mS during
the initial IR burst which is usually 2.5mS or longer with almost all
protocols. The initial burst is about 9mS with the NEC protocol. As it
happens, I've posted code to send/receive, encode/decode the NEC
protocol as RF. The only difference for receiving is the polarity -
the IR receiver is active low where an RF receiver is active high. For
sending, modify my RF code with Bruce Reynold's IR code which I cited
earlier. You can even leave it at 40kHz but you'll need to use the NEC
timing in my code. See
http://www.picbasic.co.uk/forum/showthread.php?t=6261.

Let us see.