Microwave Communication
Which of the following operating frequencies is used for the modern loran navigational system?

Loran C: 100 kHz
Loran B: 900 kHz
Loran D: 10.2 kHz
Loran A: 1950 kHz

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

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

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