Login
or
Register for FREE!
Login
or
Register for FREE!
Subel. A
A
60 questions
B
72 questions
C
60 questions
D
24 questions
E
24 questions
F
36 questions
G
24 questions
6 questions
1
2
3
4
5
6
7
8
9
10
Hide Distractors
Hide Distractors
1
2
3
4
5
6
7
8
9
10
Subelement A
VHF-DSC Equipment & Operation:
Section 6
Transmitter Technology:
6A1
What is the maximum allowable deviation of a marine VHF transmitter?
A.
12 kHz
B.
10 kHz
C.
7.
5
kHz
Correct Answer
D.
5
kHz
6A1
This question does not yet have an explanation!
Register to add one
Tags:
none
6A2
What is the modulation index?
Correct Answer
A.
The maximum carrier deviation divided by the maximum modulation frequency.
B.
The maximum modulation frequency divided by the maximum carrier frequency.
C.
The maximum carrier deviation multiplied by the maximum carrier frequency.
D.
The maximum carrier deviation divided by the amount of pre-emphasis.
6A2
This question does not yet have an explanation!
Register to add one
Tags:
none
6A3
How is pre-emphasis used in an FM transceiver?
A.
The lower modulation frequencies are boosted before transmitting by 3 db per octave and reduced by the same amount at the receiver.
Correct Answer
B.
The higher modulation frequencies are boosted before transmitting by 6 db per octave and reduced by the same amount at the receiver.
C.
The lower modulation frequencies are boosted before transmitting by 6 db per octave and reduced by the same amount at the receiver.
D.
The higher modulation frequencies are boosted before transmitting by 3 db per octave and reduced by the same amount at the receiver.
6A3
This question does not yet have an explanation!
Register to add one
Tags:
none
6A4
A modulation index set to less than 1 to 1 may result in what?
A.
Excessive deviation
B.
Unstable signal excursions
Correct Answer
C.
Unusually
low
level
transmit
audio
D.
Unusually high pitch audio response
6A4
This question does not yet have an explanation!
Register to add one
Tags:
none
6A5
What is the most common type of emission for shipboard VHF-DSC transceivers?
A.
F1B
B.
J3B
Correct Answer
C.
G3E
D.
H3E
6A5
This question does not yet have an explanation!
Register to add one
Tags:
none
6A6
How many sidebands does a VHF FM transmitter have?
A.
One
B.
Two
C.
One to four
Correct Answer
D.
Many
6A6
This question does not yet have an explanation!
Register to add one
Tags:
none
Go to 5
Go to 7
×
Log in
Sign in with Google
- or -
Stay logged in
Forgot password?
- or -
Continue as guest