在symbian上随心控制红外线（7） ------ 答疑篇 Saturday, October 10, 2009

1. They have to do with the remote control protocols.
   Signal gap is the delay between each signal that the remote sends.
   Signal length is how many 0s and 1s are sent for each code.
   Repeat codes are used by some remotes to indicate that you're holding a button down -- instead of just sending the same key over and over, it sends the key once and then sends a special code that indicates it's being held.
2. Typical remote controls use a 38KHz carrier wave for modulation, and that normally has a 50% duty cycle.