GFSK is an acronym for Gaussian frequency-shift keying.  It's a type of frequency shift keying (FSK) modulation that uses a Gaussian f...

Let's discuss SYN-ACK. I really breezed past it yesterday and it was actually important to understanding how the modem came to be. Bel...

Older readers might associate the word "modem" with the dial-up noise . That noise is the sound of the modem, communicating with...

Let me stop and explain "symbols" for a moment. In ASK a symbol might just be a dot or dash in Morse code. Other digital modes us...