Microwave Communication
In microwave transmission using digital radio, what causes most intersymbol interference?

Slow fading
Rayleigh fading
Random Doppler shift
Delayed spreading

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Microwave Communication
The cavity resonator

Has a low Q factor for narrow operation.
Is equivalent to an LC resonant circuit
In a reflect klystron has its output taken from the reflector plate
Produces a frequency which is independent of the cavity size.

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