Modulation using quasi-parallel to serial conversion to reduce bandwidth (7% chose this)
Modulation using quadra-pole sideband keying to generate spread spectrum signals (23% chose this)
Modulation using Fast Fourier Transforms to generate frequencies at the first, second, third, and fourth harmonics of the carrier frequency to improve noise immunity (18% chose this)
Modulation in which digital data is transmitted using 0-, 90-, 180- and 270-degrees phase shift to represent pairs of bits (53% chose this)
What is the output voltage if an input signal is applied to the secondary winding of a 4:1 voltage step-down transformer instead of the primary winding?
The input voltage is multiplied by 4 (58% chose this)
The input voltage is divided by 4 (36% chose this)
Additional resistance must be added in series with the primary to prevent overload (4% chose this)
Additional resistance must be added in parallel with the secondary to prevent overload (1% chose this)