Which technique, in Loran, allows the use of single transmitter station in two chains? - Avionics MCQ

Aeronautical & Aerospace Engineering : Avionics - Quiz(MCQ)

Which technique, in Loran, allows the use of single transmitter station in two chains?

A)

Pulsing

B)

Blanking

C)

Blinking

D)

Continuous wave transmission

Correct Answer : Blanking

Explanation : The Loran signal format can be modified to accommodate a single transmitter station in two chains. This is accomplished by permitting transmission for one of the chains to take precedence over the other when the signal format calls for simultaneous transmission in both chains. This function is called blanking.

Recently Updated in Avionics Questions

Which of the following type is not used in an Omega system?

A)

Valley span

B)

Insulated tower

C)

Hanging tower

D)

Grounded tower

Correct Answer : Option (C) : Hanging tower

Explanation : Since the Omega stations transmit in very low frequencies, the antennas are the largest physical structures in the stations. Three types of antennas are employed in the Omega system: grounded tower, insulated tower, and the valley span.

_____ acts as a coarse tuning device for the antenna?

A)

Loop

B)

Helix

C)

Filters

D)

Amplifiers

Correct Answer : Option (B) : Helix

Explanation : The RF signal that is to be transmitted is transferred to the ‘Helix,’ a large helical coil that acts as a coarse tuning device for the antenna. The helix is equipped with separate taps for each signal frequency transmitted.

What type of transmission is used in Omega system?

A)

Phase modulated wave

B)

Continuous wave

C)

Amplitude modulated wave

D)

Frequency modulated wave

Correct Answer : Option (B) : Continuous wave

Explanation : At each Omega station, continuous wave signals on four common frequencies and one station unique frequency. The signal frequencies are time shared among the stations so that a given frequency is transmitted by only one station at any given time.

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