How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?
Dot and dash
On and off
High and low
Mark and space✓الإجابة الصحيحة
الشرح
The two FSK signaling frequencies are called mark and space, terms inherited from landline telegraphy. Dot and dash belong to Morse code and on and off to on-off keying.