There is an excellent article on this site about the format of the Pronto IR codes. See
[Link: remotecentral.com].
If you just want to examine frequencies, the formula for the Pronto is
Frequency = 1000000/(P * .241246)
where P is the second number of the Pronto code. Remember that it is in hex and needs to be converted to decimal.
In OmniRemote, each bit in the numbers following the frequency corresponds to an interval of 1/5 of the carrier frequency. 1 is on and 0 is off.
Hope this helps.
Peter Sharpe
www.ordesktop.com