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G8C - Signals and Emissions

General Class

Digital signal processing: sampling rates, DSP filtering, software defined radio

15 questions | Updated: Dec 9, 2025

All G0A G0B G1A G1B G1C G1D G1E G2A G2B G2C G2D G2E G3A G3B G3C G4A G4B G4C G4D G4E G5A G5B G5C G6A G6B G7A G7B G7C G8A G8B G8C G9A G9B G9C G9D
G8C02

Which digital mode is used as a low-power beacon for assessing HF propagation?
G8C03

What part of a packet radio frame contains the routing and handling information?
G8C04

Which of the following describes Baudot code?
G8C05

In an ARQ mode, what is meant by a NAK response to a transmitted packet?
G8C06

What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?
G8C07

Which of the following narrow-band digital modes can receive signals with very low signal-to-noise ratios?
G8C08

Which of the following statements is true about PSK31?
G8C09

Which is true of mesh network microwave nodes?
G8C10

How does forward error correction (FEC) allow the receiver to correct data errors?
G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?
G8C12

Which type of code is used for sending characters in a PSK31 signal?
G8C13

What is indicated on a waterfall display by one or more vertical lines on either side of a data mode or RTTY signal?
G8C14

Which of the following describes a waterfall display?
G8C15

What does an FT8 signal report of +3 mean?
G8C16

Which of the following provide digital voice modes?