Which statement best describes how the PFN selection influences pulse width?

Which statement best describes how the PFN selection influences pulse width?

• A. The pulse width depends on the PFN selected by the PULSE SELECT switch on the RSC
• B. The pulse width is fixed and cannot be changed
• C. The pulse width is determined by the magnetron frequency
• D. The pulse width is controlled by the antenna height

Answer: (A)

Pulse width is set by how long energy is delivered to the transmitter, and that timing is controlled by the Pulse Forming Network. Selecting a PFN with the appropriate timing elements through the PULSE SELECT switch on the RSC changes how long the network releases energy, so the emitted RF pulse has the corresponding width. The magnetron frequency fixes the carrier frequency, not the duration of the pulse. Antenna height doesn’t affect pulse duration either. So choosing the PFN is how the system controls pulse width.

Pulse width is set by how long energy is delivered to the transmitter, and that timing is controlled by the Pulse Forming Network. Selecting a PFN with the appropriate timing elements through the PULSE SELECT switch on the RSC changes how long the network releases energy, so the emitted RF pulse has the corresponding width. The magnetron frequency fixes the carrier frequency, not the duration of the pulse. Antenna height doesn’t affect pulse duration either. So choosing the PFN is how the system controls pulse width.