Microwave Communication
In a pulsed radar set, the function of the duplexer is to

Aid in calibrating the display unit
Allow the transmitter and the receiver to operate from a common antenna
All of these
Prevent frequency drift in the klystron

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Microwave Communication
As the electron beam moves through a klystron’s intercavity drift space

Density modulation at the input cavity creates velocity modulation at the output cavity
Velocity modulation at the input cavity creates density modulation at the output cavity
Frequency modulation at the input cavity creates velocity modulation at the output cavity
Phase modulation at the input cavity creates velocity modulation at the output cavity.

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