// A "one" is encoded with a 560 usec pulse, and 3*560 (1680) usec space.
// The header is a 9000 usec pulse, 4500 usec space.
// Commands end with a trailing 560 usec pulse.
-// A repeat block is a 9000 usec pulse, 2250 usec space, then trailing pulse.
+// A repeat block (if used) is a 9000 usec pulse, 2250 usec space, then
+// trailing pulse.
// Each command runs for 110000 usec before another can be executed.
+// The normal carrier frequency is 38 kHz.
NECProtocol::NECProtocol(
QObject *guiObject,