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

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

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

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

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Microwave Communication
In a pulsed radar set, the STC circuit is used to

Reduce interference from the effects of sea return
Increases receiver sensitivity for echoes from targets
Vary the pulse frequency in order to control the maximum target
Improve the target bearing resolution

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