Theoretically electromagnetic radiation field strength varies in inverse proportion to the square of the distance, but when atmospheric attenuation effects and the absorption of the terrain are taken into account the attenuation can be as high as the inverse ___________ power of the distance.

Microwave Communication
Theoretically electromagnetic radiation field strength varies in inverse proportion to the square of the distance, but when atmospheric attenuation effects and the absorption of the terrain are taken into account the attenuation can be as high as the inverse ___________ power of the distance.

Fourth

Third

Fifth

Sixth

Fourth

Third

Fifth

Sixth

ANSWER DOWNLOAD EXAMIANS APP

Microwave Communication
At what position is the input signal inserted into a traveling-wave tube?

At the collector

At the control grid of the electron gun

At the collector end of the helix

At the cathode end of the helix

At the collector

At the control grid of the electron gun

At the collector end of the helix

At the cathode end of the helix

ANSWER DOWNLOAD EXAMIANS APP

Microwave Communication
A magnetron is operated at a duty cycle of 0.001. It has a peak power output of 100 kilo-watts. Its average power is

1,000 watts

100 watts

1,000,000 watts

10,000 watts

1,000 watts

100 watts

1,000,000 watts

10,000 watts

ANSWER DOWNLOAD EXAMIANS APP

Microwave Communication
A PPI cathode-ray tube as used on a radar set

Indicates both the range and azimuth of a target

Indicates only the range of a target

Is used to check the percentage of modulation

Is used for receiver alignment

Indicates both the range and azimuth of a target

Indicates only the range of a target

Is used to check the percentage of modulation

Is used for receiver alignment

ANSWER DOWNLOAD EXAMIANS APP

Microwave Communication
If the duration of the radar transmitted pulse, on a particular range of operation, is increased, the required bandwidth of the receiver’s IF amplifiers

Must be doubled

Must be increased

Must remain as before

May be decreased

Must be doubled

Must be increased

Must remain as before

May be decreased

ANSWER DOWNLOAD EXAMIANS APP

Microwave Communication
A thin layer of dirt and grime coverts the reflecting surface of the parabolic dish of a radar set. The particular effect on the performance of the radar will be

No noticeable effect

A decrease in gain

A decrease in range

A reduction in horizontal resolution

No noticeable effect

A decrease in gain

A decrease in range

A reduction in horizontal resolution

ANSWER DOWNLOAD EXAMIANS APP

Microwave Communication

Microwave Communication At what position is the input signal inserted into a traveling-wave tube?

Microwave Communication A magnetron is operated at a duty cycle of 0.001. It has a peak power output of 100 kilo-watts. Its average power is

Microwave Communication A PPI cathode-ray tube as used on a radar set

Microwave Communication If the duration of the radar transmitted pulse, on a particular range of operation, is increased, the required bandwidth of the receiver’s IF amplifiers

Microwave Communication A thin layer of dirt and grime coverts the reflecting surface of the parabolic dish of a radar set. The particular effect on the performance of the radar will be

Microwave Communication
At what position is the input signal inserted into a traveling-wave tube?

Microwave Communication
A magnetron is operated at a duty cycle of 0.001. It has a peak power output of 100 kilo-watts. Its average power is

Microwave Communication
A PPI cathode-ray tube as used on a radar set

Microwave Communication
If the duration of the radar transmitted pulse, on a particular range of operation, is increased, the required bandwidth of the receiver’s IF amplifiers

Microwave Communication
A thin layer of dirt and grime coverts the reflecting surface of the parabolic dish of a radar set. The particular effect on the performance of the radar will be