Sound Card Digital Modes

• Even a basic SB16 can transmit/receive a very large bandwidth

• Modern computers and DSPs provide incredible signal processing power

• Radio usually needs an additional PTT signal to key up the transmitter

• Interfaces vary from sub-$10 homebrews to >$200 USB behemoths.

Notes:

Even a decade ago, many digital modes required dedicated DSP boxes.

PTT = push to talk, the switch on the microphone.