ISCET RADAR FLASHCARDS | 213 QUESTIONS |
WITH ACCURATE SOLUTIONS!!
To install and maintain a RADAR, you must have: Answer - GROL w/ Radar or
GMDSSIM w/ Radar
Who may replace fuses and receiving type tubes and circuits in a Radar?
Answer - Holder of GROL w/ Radar
Under what circumstances can an unlicensed person operate a radar set?
Answer - Only if the Tx is a non-tunable type and when the master of the ship
designated him to operate it
What Radar maintenance work may be done by unlicensed workers? Answer -
None
Who is permitted to operate a ship Radar? Answer - Master of the ship, or
anyone designated by the master.
What is box 46 of EL8-A? Answer - TR Box
What is box 47 of EL8-A? Answer - RF Attenuator
What is box 48 of EL8-A? Answer - Klystron
,What is box 49 of EL8-A? Answer - Crystal Detector
What is box 50 of EL8-A? Answer - Discriminator
The minimum range of a Radar is primarily determined by: Answer - The pulse
width and TR (TRL) cell recovery time
An RF mixer has what purpose in a Radar system? Answer - It converts low-
level signal to a different frequency
The switching devices most commonly used in pulse networks, and pulse
transformers are/is: Answer - SCR's and Thyratrons
Good bearing resolution largely depends upon: Answer - A narrow antenna
beam in the horizontal plane
Bearing Resolution is: Answer - The ability to distinguish two adjacent targets
of equal distance.
An artificial line is used for: Answer - Determining the shape and durations of
the pulses
What device is located between the magnetron and the mixer and prevents
received signals from entering the magnetron? Answer - The ATR box
The ATR Box: Answer - Prevents the received signal from entering the
transmitter
, When a pulse radar is radiating, which elements in the TR box are energized?
Answer - The TR and ATR tubes
In the AFC system, the discriminator compares the frequencies of the: Answer
- Magnetron and Klystron
The purpose of the discriminator circuit in a Radar is to: Answer - Generate a
corrective voltage for controlling the frequency of the klystron local oscillator
Where is the RF Attenuator used in a Radar? Answer - Between the Magnetron
and AFC section of the receiver
What frequency is the discriminator tuned to? Answer - 30 MHz IF
The usual intermediate frequency of a shipboard Radar unit is: Answer - 30 or
60 MHz
The error voltage from the discriminator us applied to: Answer - The repeller
(reflector) of the klystron
How may the frequency of the klystron be varied? Answer - Small changes can
be made by adjusting the repeller voltage and large changes can be made by
adjusting the size of the resonant cavity
Fine adjustment of the reflex klystron are accomplished by: Answer - Varing
the repeller voltage
The pulse repetition rate (PRR) refers to: Answer - The pulse rate of the
magnetron
WITH ACCURATE SOLUTIONS!!
To install and maintain a RADAR, you must have: Answer - GROL w/ Radar or
GMDSSIM w/ Radar
Who may replace fuses and receiving type tubes and circuits in a Radar?
Answer - Holder of GROL w/ Radar
Under what circumstances can an unlicensed person operate a radar set?
Answer - Only if the Tx is a non-tunable type and when the master of the ship
designated him to operate it
What Radar maintenance work may be done by unlicensed workers? Answer -
None
Who is permitted to operate a ship Radar? Answer - Master of the ship, or
anyone designated by the master.
What is box 46 of EL8-A? Answer - TR Box
What is box 47 of EL8-A? Answer - RF Attenuator
What is box 48 of EL8-A? Answer - Klystron
,What is box 49 of EL8-A? Answer - Crystal Detector
What is box 50 of EL8-A? Answer - Discriminator
The minimum range of a Radar is primarily determined by: Answer - The pulse
width and TR (TRL) cell recovery time
An RF mixer has what purpose in a Radar system? Answer - It converts low-
level signal to a different frequency
The switching devices most commonly used in pulse networks, and pulse
transformers are/is: Answer - SCR's and Thyratrons
Good bearing resolution largely depends upon: Answer - A narrow antenna
beam in the horizontal plane
Bearing Resolution is: Answer - The ability to distinguish two adjacent targets
of equal distance.
An artificial line is used for: Answer - Determining the shape and durations of
the pulses
What device is located between the magnetron and the mixer and prevents
received signals from entering the magnetron? Answer - The ATR box
The ATR Box: Answer - Prevents the received signal from entering the
transmitter
, When a pulse radar is radiating, which elements in the TR box are energized?
Answer - The TR and ATR tubes
In the AFC system, the discriminator compares the frequencies of the: Answer
- Magnetron and Klystron
The purpose of the discriminator circuit in a Radar is to: Answer - Generate a
corrective voltage for controlling the frequency of the klystron local oscillator
Where is the RF Attenuator used in a Radar? Answer - Between the Magnetron
and AFC section of the receiver
What frequency is the discriminator tuned to? Answer - 30 MHz IF
The usual intermediate frequency of a shipboard Radar unit is: Answer - 30 or
60 MHz
The error voltage from the discriminator us applied to: Answer - The repeller
(reflector) of the klystron
How may the frequency of the klystron be varied? Answer - Small changes can
be made by adjusting the repeller voltage and large changes can be made by
adjusting the size of the resonant cavity
Fine adjustment of the reflex klystron are accomplished by: Answer - Varing
the repeller voltage
The pulse repetition rate (PRR) refers to: Answer - The pulse rate of the
magnetron
