Klystron oscillators are most often used in the frequency range of

Oscillators of a klystron tube are maintained

A

By bunches of electrons passing the cavity grids

B

By plate-to-cathode feedback

C

By feedback between the accelerating grid and the repeller

D

By circulating bunches of electrons within the cavities.

The main frequency determining element of a klystron is

A

The repeller voltage

B

The accelerating voltage

C

Its resonant cavity

D

Its mode of operation

The coarse frequency adjustment of a reflex klystron is accomplished by

A

The AFC system

B

Adjusting the flexible wall of the resonant cavity

C

An adjustment in the synchronizer

D

Varying the repeller voltage

A reflex klystron is oscillating at the frequency of its resonant cavity. If the reflector voltage is made slightly less negative, the

A

Oscillation will cease

B

Output power would increase

C

The frequency will decrease

D

Bunching would occur earlier in time

Quartz crystal is most commonly used in crystal oscillators because ___________

A

It has superior electrical properties

B

It is easily available

C

It is quite inexpensive

D

None of the above

In an SHF pulsed radar set, a reflex klystron can be used as a

A

Single mixer stage

B

Local oscillator

C

Transmitter oscillator

D

Duplexer stage

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

A

Frequency modulation at the input cavity creates velocity modulation at the output cavity

B

Velocity modulation at the input cavity creates density modulation at the output cavity

C

Density modulation at the input cavity creates velocity modulation at the output cavity

D

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

The Zaskar range, the Ladakh range, the Kailas and the Karakoram Range are the main ranges of:

A

The Western Ghat

B

The Aravali

C

The Himalayan system

D

The Eastern Ghat

What frequency range is the high frequency band?

A

3 kHz

B

3 to 30 MHz

C

30 to 300 MHz

D

10 GHz

The frequency generated by each decade in a direct frequency synthesizer is much higher than the frequency shown; this is done to

A

Reduce the spurious frequency problem

B

Increase the frequency stability of the synthesizer

C

Reduce the number of decades

D

Reduce the number of crystals required

Klystron oscillators are most often used in the frequency range of

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