Repeaters & Linking Systems Flashcards
7 cards from real Ham Radio Technician Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Repeaters & Linking Systems flashcards as text
What is EchoLink in amateur radio?
Answer: A software system that links amateur radio stations via the internet using Voice over IP
EchoLink is a software-based system that connects amateur radio stations and repeaters worldwide via Voice over IP (VoIP) using the internet.
What is IRLP (Internet Radio Linking Project)?
Answer: A method of connecting amateur radio repeaters to each other via the internet
IRLP uses dedicated hardware nodes and the internet to connect amateur radio repeaters around the world, allowing stations to communicate across long distances.
In EchoLink and IRLP systems, what is a 'node'?
Answer: An individual station or repeater connected to the internet-linking network
A node is an individual station or repeater that is connected to an internet linking network such as EchoLink or IRLP, each assigned a unique node number.
What is DMR (Digital Mobile Radio) in amateur radio?
Answer: A digital voice protocol that uses time slots to allow multiple simultaneous conversations on one frequency
DMR uses TDMA (Time Division Multiple Access) to divide a channel into two time slots, allowing two separate conversations to share a single frequency simultaneously.
What does the abbreviation 'APRS' stand for?
Answer: Automatic Packet Reporting System
APRS stands for Automatic Packet Reporting System, a digital protocol used to share real-time tactical information such as GPS position data, weather, and messages.
What modulation method does D-STAR use for digital voice transmissions?
Answer: GMSK (Gaussian Minimum Shift Keying)
D-STAR uses GMSK (Gaussian Minimum Shift Keying) modulation to carry digital voice encoded with AMBE (Advanced Multi-Band Excitation) codec.
Which capability distinguishes digital systems like DMR and D-STAR from traditional analog FM repeaters?
Answer: Automatic embedding of the operator's callsign as data in every transmission
Digital systems like DMR and D-STAR automatically embed the operator's callsign as digital data in every transmission, making identification automatic without a voice announcement.