Canadian Basic pool, section 3-12

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Subelement 3

Station Assembly, Practice and Safety

Section 3-12

carrier suppression, SSB fundamentals

3-12-01

What may happen if an SSB transmitter is operated with the microphone gain set too high?

A.
It may cause interference to other stations operating on a higher frequency band
B.
It may cause atmospheric interference in the air around the antenna
Correct Answer
C.
It may cause splatter interference to other stations operating near its frequency
D.
It may cause digital interference to computer equipment

3-12-01

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3-12-02

What may happen if an SSB transmitter is operated with too much speech processing?

A.
It may cause digital interference to computer equipment
B.
It may cause atmospheric interference in the air around the antenna
C.
It may cause interference to other stations operating on a higher frequency band
Correct Answer
D.
It may cause splatter interference to other stations operating near its frequency

3-12-02

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3-12-03

What is the term for the average power supplied to an antenna transmission line during one RF cycle, at the crest of the modulation envelope?

A.
Peak output power
Correct Answer
B.
Peak envelope power
C.
Average radio-frequency power
D.
Peak transmitter power

3-12-03

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3-12-04

What is the usual bandwidth of a singlesideband amateur signal?

A.
1 kHz
B.
2 kHz
C.
Between 3 and 6 kHz
Correct Answer
D.
Between 2 and 3 kHz

3-12-04

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3-12-05

In a typical single-sideband phone transmitter, what circuit processes signals from the balanced modulator and sends signals to the mixer?

A.
IF amplifier
Correct Answer
B.
Filter
C.
RF amplifier
D.
Carrier oscillator

3-12-05

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3-12-06

What is one advantage of carrier suppression in a double-sideband phone transmission?

Correct Answer
A.
More power can be put into the sidebands
B.
Only half the bandwidth is required for the same information content
C.
Greater modulation percentage is obtainable with lower distortion
D.
Simpler equipment can be used to receive a double-sideband suppressedcarrier signal

3-12-06

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3-12-07

What happens to the signal of an overmodulated single-sideband or double-sideband phone transmitter?

A.
It becomes louder with no other effects
B.
It occupies less bandwidth with poor high-frequency response
C.
It has higher fidelity and improved signal-to-noise ratio
Correct Answer
D.
It becomes distorted and occupies more bandwidth

3-12-07

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3-12-08

How should the microphone gain control be adjusted on a single-sideband phone transmitter?

Correct Answer
A.
For slight movement of the ALC meter on modulation peaks
B.
For full deflection of the ALC meter on modulation peaks
C.
For 100% frequency deviation on modulation peaks
D.
For a dip in plate current

3-12-08

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3-12-09

The purpose of a balanced modulator in an SSB transmitter is to:

A.
make sure that the carrier and both sidebands are 180o out of phase
B.
ensure that the percentage of modulation is kept constant
C.
make sure that the carrier and both sidebands are in phase
Correct Answer
D.
suppress the carrier and pass on the two sidebands

3-12-09

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3-12-10

In a SSB transmission, the carrier is:

A.
transmitted with one sideband
Correct Answer
B.
reinserted at the receiver
C.
inserted at the transmitter
D.
of no use at the receiver

3-12-10

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3-12-11

The automatic level control (ALC) in a SSB transmitter:

A.
eliminates the transmitter distortion
Correct Answer
B.
controls the peak audio input so that the final amplifier is not overdriven
C.
increases the occupied bandwidth
D.
reduces the system noise

3-12-11

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