BasicB-001-018-002
An unmodulated carrier may be transmitted only:
D
Answer
Regulations and administration
Type
A
for holding a frequency until a net begins
B
if the final RF amplifier output is kept under 5 watts
C
for CW communication
D
for brief tests on frequencies below 30 MHz
Answer Notes
In Canadian amateur radio regulations, transmitting an unmodulated carrier (a continuous radio wave with no voice, data, or code applied) is generally prohibited. This is because it needlessly occupies bandwidth and can cause severe interference to other operators trying to communicate.
However, a specific exception allows operators to transmit an unmodulated carrier for brief tests on frequencies below 30 MHz. This permits amateurs to quickly tune their HF antennas or amplifiers. Distractors like 'holding a frequency' are completely illegal and considered malicious interference, while Continuous Wave (CW) is not unmodulated; it modulates the carrier by turning it on and off.
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What is the lowest output frequency of the repeaters that holders of an Amateur Radio Operator Certificate with only a Basic Qualification are allowed to use?