July 14, 2013

FCC Technician Exam Question Of The Day (T8A11)

Q) What is the approximate maximum bandwidth required to transmit a CW signal?

A) 150 Hz

NJ2X Notes:
The abreviation, "CW" means, "continuous wave" and was used to differentiate the original spark-gap generated waves from the early days of radio.  CW is used to transmit morse code and is a very narrow bandwidth mode and very efficient.  As a result, CW is an excellent choice for attempting a contact under conditions where other modes are not making it.  For weak signal work, CW seems to punch through like magic.