8-13B: Modulation Flashcards
Transmitting Systems (2 cards)
1
Q
8-13B3
A shipboard RADAR uses a PFN driving a magnetron cathode through a step-up transformer. This results in which type of modulation?
A. Frequency modulation
B. Amplitude modulation.
C. Continuous Wave (CW) modulation.
D. Pulse modulation
A
ANSWER D
The term “PFN” stands for Pulse-Forming Network, which is a type of pulse modulation.
2
Q
8-13B4
In a pulse modulated magnetron what device determines the shape and width of the pulse?
A. Pulse Forming Network.
B. Thyratron.
C. LC parallel circuit.
D. Dimensions of the magnetron cavity.
A
ANSWER A
The pulse-forming network is a rectagular wave generator based on an LC network that alternately stores, and then releases, the energy.
