Online study for the FCC commercial radio license exams. Advertise amateur radio products and services on HamTestOnline
 

Element 8: Ship Radar Techniques

effective 6/25/2009

Show:
    Unseen questions
    Weak questions
    Review questions
    Learned questions
    Incorrect answer choices  
   

8-A-06: Pulse Width - Pulse Repetition Rates

8-6A1: If the PRF is 2500 Hz, what is the PRI?

400 microseconds.

40 microseconds.

250 microseconds.

800 microseconds.



8-6A2: If the pulse repetition frequency (PRF) is 2000 Hz, what is the pulse repetition interval (PRI)?

0.0005 seconds.

0.05 seconds.

0.005 seconds.

0.00005 seconds.



8-6A3: The pulse repetition rate (PRR) refers to:

The pulse rate of the magnetron.

The reciprocal of the duty cycle.

The pulse rate of the local oscillator tube.

The pulse rate of the klystron.



8-6A4: If the RADAR unit has a pulse repetition frequency (PRF) of 2000 Hz and a pulse width of 0.05 microseconds, what is the duty cycle?

0.0001

0.0005

0.05

0.001



8-6A5: Small targets are best detected by:

Using a long pulse width with high output power.

Short pulses transmitted at a fast rate.

Using J band frequencies.

All of these answers are correct.



8-6A6: What is the relationship between pulse repetition rate and pulse width?

Lower PRR with wider pulse width.

Higher PRR with wider pulse width.

The pulse repetition rate does not change with the pulse width.

The pulse width does not change with the pulse repetition rate.





Color key:
● = Unseen
● = Weak
● = Review
● = Learned
● = Incorrect answer
Previous group:
8-A-05: Range, Pulse Width, PRF
Back to index:
Element 8: Ship Radar Techniques
Next group:
8-A-07: Components-1
Home     FAQ     How to     Feedback     Terms and Conditions     Question pools     Documents     Contact us     HamTestOnline     TestOnline
A TestOnline website.  Copyright © 2001-2009, J. Cunningham & Assoc.  All rights reserved.