ARRL ARRL Operating Procedures and Bands

Question 1

What is the frequency range of the 40-meter amateur HF band?

Accepted Answer

7.0–7.3 MHz

Answer

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?

Accepted Answer

Single Sideband

Answer

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?

Accepted Answer

Continuous Wave (Morse code)

Answer

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?

Accepted Answer

FT8

Answer

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?

Accepted Answer

2 meters (144 MHz)

Answer

The 2-meter band (144–148 MHz) is the most widely used amateur band for local FM repeater communications in the US.

(ARRL) American Radio Relay League Practice Test