30 meters is digital, CW, PSK, packet etc. Lot of fun on that band.
All those transmission types are continuous wave (CW), whether it is done manually (morse code), packet (PSK), RTTY (teletype), or Computer encription (digital) it is still a continuous wave transmission. At least that's what I was taught 30 years ago in Electronics class.
Continuous wave is either on or off, which is the basis for morse code, on you get a dit or a dah, off is no emission. In other forms of continuous wave the data takes the form of the degree of amplitude of either off or on.
BTW, I scored in the mid 90's on my practice tests for the Technician exam and in the mid 80's for the General. I hope that means that when it comes cruch time for taking the actual tests that I'll pass both.
As for the Extra license I need to bone up on some of the Theory a little better before I take that exam. It's a lot easier to pass a test if you understand the context of the questions being asked rather than attempting to memorize the answers to a data bank consisting of hundreds of questions. Of Course some memorization is inevitable as you aren't allowed to have graph of Frequencies and band allotments in hand during the test.