effective 4/01/2007

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

A-005-05: FM deviation, modulation index, deviation ratio, deviation meter

A-005-05-01: In an FM phone signal having a maximum frequency deviation of 3000 Hz either side of the carrier frequency, what is the modulation index, when the modulating frequency is 1000 Hz?

3

0.3

3000

1000

A-005-05-02: What is the modulation index of an FM phone transmitter producing an instantaneous carrier deviation of 6 kHz when modulated with a 2 kHz modulating frequency?

3

0.333

2000

6000

A-005-05-03: What is the deviation ratio of an FM phone signal having a maximum frequency swing of plus or minus 5 kHz and accepting a maximum modulation rate of 3 kHz?

1.66

60

0.16

0.6

A-005-05-04: What is the deviation ratio of an FM phone signal having a maximum frequency swing of plus or minus 7.5 kHz and accepting a maximum modulation rate of 3.5 kHz?

2.14

0.47

47

0.214

A-005-05-05: When the transmitter is not modulated, or the amplitude of the modulating signal is zero, the frequency of the carrier is called its:

centre frequency

frequency deviation

frequency shift

modulating frequency

A-005-05-06: In a FM transmitter system, the number of cycles of deviation from the centre frequency is determined solely by the:

amplitude of the modulating frequency

frequency of the modulating frequency

amplitude and the frequency of the modulating frequency

modulating frequency and the amplitude of the centre frequency

A-005-05-07: Any FM wave with single-tone modulation has:

an infinite number of sideband frequencies

two sideband frequencies

four sideband frequencies

one sideband frequency

A-005-05-08: The deviation meter works on the principle of:

a carrier null and multiplying the modulation frequency by the modulation index

detecting the frequencies in the sidebands

the amplitude of power in the sidebands

a carrier peak and dividing by the modulation index

A-005-05-09: When using a deviation meter, it is important to know:

modulating frequency and the modulation index

modulation index

modulating frequency

pass-band of the IF filter

A-005-05-10: What is the total bandwidth of an FM-phone transmission having a 5-kHz deviation and a 3-kHz modulating frequency?

16 kHz

8 kHz

5 kHz

3 kHz

A-005-05-11: What is the frequency deviation for a 12.21-MHz reactance-modulated oscillator in a 5-kHz deviation, 146.52-MHz FM-phone transmitter?

416.7 Hz

12 kHz

5 kHz

41.67 Hz

 Color key: ● = Unseen ● = Weak ● = Review ● = Learned ● = Incorrect answer
 Previous group:A-005-04: AM, single sideband, linearity, two-tone test Back to index:Canadian Advanced Exam Question Bank Next group:A-005-06: FM transmitter, repeater circuits
Home     What is ham radio?     Which exam to take?     Study tips     Where to take the exam?     Frequency Asked Questions (FAQ)     How to     How much math?     Trouble with practice exams     Feedback     Prices     Ham It Forward     Free Extra course for active volunteer examiners     Refund policy     Terms and conditions     Bumper sticker     Advertise with us     The Ham band     Rate us     Question pools     Course structure     Survivalists     Documents     facebook     Google+     Contact us     Christina's story     TestOnline     Links

The best study method, customer support, and guarantee in the industry!