ARRL ARRL Operating Procedures and Bands 1 — Questions and Answers
Question 1: What is the frequency range of the 40-meter amateur HF band?
- 3.5–4.0 MHz
- 7.0–7.3 MHz (Correct answer)
- 10.1–10.15 MHz
- 14.0–14.35 MHz
Correct answer: 7.0–7.3 MHz
The 40-meter amateur band covers 7.0–7.3 MHz and is popular for regional and continental daytime and nighttime communication.
Question 2: What does 'SSB' stand for in amateur radio voice communication?
- Single Signal Beam
- Single Sideband (Correct answer)
- Standard Signal Broadcast
- Short Skip Band
Correct answer: Single Sideband
SSB stands for Single Sideband, a form of amplitude modulation that suppresses one sideband and the carrier for efficient voice transmission.
Question 3: What does 'CW' stand for in amateur radio?
- Carrier Wave
- Continuous Wave (Morse code) (Correct answer)
- Clear Wave
- Coded Wavelength
Correct answer: Continuous Wave (Morse code)
CW stands for Continuous Wave, which refers to Morse code telegraphy and remains one of the most efficient modes in amateur radio.
Question 4: What is the most widely used weak-signal digital mode on HF amateur radio bands as of recent years?
- RTTY
- PSK31
- FT8 (Correct answer)
- Packet radio
Correct answer: FT8
FT8 has become the most popular weak-signal digital mode on HF, capable of making contacts at very low signal levels invisible to human ears.
Question 5: Which amateur band is primarily used for local FM voice repeater communications across the United States?
- 10 meters (28 MHz)
- 6 meters (50 MHz)
- 2 meters (144 MHz) (Correct answer)
- 160 meters (1.8 MHz)
Correct answer: 2 meters (144 MHz)
The 2-meter band (144–148 MHz) is the most widely used amateur band for local FM repeater communications in the US.
Question 6: What are the WARC bands in amateur radio?
- 10m, 15m, and 20m
- 30m, 17m, and 12m (Correct answer)
- 40m, 80m, and 160m
- 2m, 70cm, and 23cm
Correct answer: 30m, 17m, and 12m
The WARC bands are 30m, 17m, and 12m, allocated to amateur radio at the 1979 World Administrative Radio Conference.
ARRL ARRL Operating Procedures and Bands 1
What is the frequency range of the 40-meter amateur HF band?