Note to student:
Since TM 11-668 was published, the unit of frequency has been changed from
cycles per second to hertz. The following equivalents will help you relate the two
units.
1 cycle per second (cps) = 1 hertz (Hz)
1 kilocycle per second (kcs) = 1 kilohertz (kHz)
(sometimes kc)
1 megacycle per second (mcs) = 1 megahertz (MHz)
(sometimes mc)
2