ARRL Vocabulary Development 4

Question 1

What does 'CTCSS' stand for and what is it used for?

Accepted Answer

Continuous Tone-Coded Squelch System, used to open repeater access

Answer

CTCSS is a sub-audible tone system transmitted alongside voice to selectively open a repeater's squelch or filter out unwanted signals.

Question 2

In amateur radio, what is a 'transceiver'?

Accepted Answer

A combined transmitter and receiver in one unit

Answer

A transceiver combines both a transmitter and a receiver in a single unit, allowing a station to both send and receive on radio frequencies.

Question 3

What does 'CQ' mean when called on air?

Accepted Answer

A general call seeking any station to respond

Answer

CQ is a general call used to invite any amateur radio station to respond and establish contact.

Question 4

What is 'SWR' and why is it important?

Accepted Answer

Standing Wave Ratio — measures how well the antenna system is matched

Answer

SWR (Standing Wave Ratio) indicates how well the transmitter, feedline, and antenna are impedance-matched; a high SWR wastes power and can damage equipment.

Question 5

What does 'APRS' stand for?

Accepted Answer

Automatic Packet Reporting System

Answer

APRS stands for Automatic Packet Reporting System, a digital communication protocol used for real-time position tracking and messaging.

(ARRL) American Radio Relay League Practice Test

(ARRL) American Radio Relay League Practice Test

ARRL Vocabulary Development 4