Canadian Basic pool, section 3-10

Basic

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Subelement 3

Station Assembly, Practice and Safety

Section 3-10

receiver fundamentals

3-10-01

Which list of emission types is in order from the narrowest bandwidth to the widest bandwidth?

A.
CW, SSB voice, RTTY, FM voice
B.
CW, FM voice, RTTY, SSB voice
Correct Answer
C.
CW, RTTY, SSB voice, FM voice
D.
RTTY, CW, SSB voice, FM voice

3-10-01

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3-10-02

The figure in a receiver's specifications which indicates its sensitivity is the:

Correct Answer
A.
signal plus noise to noise ratio
B.
audio output in watts
C.
bandwidth of the IF in kilohertz
D.
number of RF amplifiers

3-10-02

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3-10-03

If two receivers of different sensitivity are compared, the less sensitive receiver will produce:

A.
a steady oscillator drift
B.
more than one signal
Correct Answer
C.
less signal or more noise
D.
more signal or less noise

3-10-03

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3-10-04

Which of the following modes of transmission is usually detected with a product detector?

A.
Double sideband full carrier
B.
Frequency modulation
C.
Pulse modulation
Correct Answer
D.
Single sideband suppressed carrier

3-10-04

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3-10-05

A receiver designed for SSB reception must have a BFO (beat frequency oscillator) because:

A.
it beats with the received carrier to produce the other sideband
B.
it reduces the passband of the IF stages
Correct Answer
C.
the suppressed carrier must be replaced for detection
D.
it phases out the unwanted sideband signal

3-10-05

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3-10-06

A receiver receives an incoming signal of 3.54 MHz, and the local oscillator produces a signal of 3.995 MHz. To which frequency should the IF be tuned?

A.
7.435 MHz
B.
3.995 MHz
Correct Answer
C.
455 kHz
D.
3.54 MHz

3-10-06

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3-10-07

What kind of filter would you use to attenuate an interfering carrier signal while receiving an SSB transmission?

Correct Answer
A.
A notch filter
B.
A band pass filter
C.
An all pass filter
D.
A pi-network filter

3-10-07

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3-10-08

The three main parameters against which the quality of a receiver is measured are:

A.
selectivity, stability and frequency range
B.
sensitivity, stability and crossmodulation
C.
sensitivity, selectivity and image rejection
Correct Answer
D.
sensitivity, selectivity and stability

3-10-08

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3-10-09

A communications receiver has four filters installed in it, one at 250 Hz, one at 500 Hz, one at 2.4 kHz, and one at 6 kHz. If you were listening to single sideband, which filter would you utilize?

A.
250 Hz
Correct Answer
B.
2.4 kHz
C.
6 kHz
D.
500 Hz

3-10-09

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3-10-10

A communications receiver has four filters installed in it, one at 250 Hz, one at 500 Hz, one at 2.4 kHz and one at 6 kHz. You are copying a CW transmission and there is a great deal of interference. Which one of the filters would you choose?

A.
500 Hz
B.
2.4 kHz
C.
6 kHz
Correct Answer
D.
250 Hz

3-10-10

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3-10-11

Selectivity can be placed in the audio stages of a receiver by the utilization of RC active or passive audio filters. If you were to copy CW, which of the following bandpasses would you choose?

A.
2100 - 2300 Hz
B.
300 - 2700 Hz
Correct Answer
C.
750 - 850 Hz
D.
100 - 1100 Hz

3-10-11

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