Ham Radio General Class Test Digital Modes and Data Communications 2

Question 1

What is the primary function of a TNC (Terminal Node Controller) in a packet radio station?

Accepted Answer

It converts computer data to audio tones for radio transmission and decodes received tones back to data

Answer

It increases the transmitter output power for longer communication range

Answer

It filters adjacent channel interference from neighboring stations

Answer

It monitors band conditions and automatically selects the best operating frequency

Question 2

What data link layer protocol is used in traditional amateur packet radio?

Accepted Answer

AX.25

Answer

TCP/IP

Answer

X.400

Answer

RS-232

Question 3

What is Winlink used for in amateur radio?

Accepted Answer

Sending and receiving email messages via radio networks without internet access

Answer

Linking VHF/UHF repeaters together over the internet

Answer

Monitoring HF propagation beacons and reporting conditions

Answer

Remotely controlling amateur satellites in orbit

Question 4

What is the approximate bandwidth of an FT8 signal?

Accepted Answer

50 Hz

Answer

500 Hz

Answer

2.7 kHz

Answer

6 kHz

Question 5

Which software application is the primary platform for operating FT8, FT4, WSPR, and other weak-signal modes?

Accepted Answer

WSJT-X

Answer

Fldigi

Answer

Winlink Express

Answer

Ham Radio Deluxe

Question 6

What is the purpose of forward error correction (FEC) in digital communication modes?

Accepted Answer

It allows receivers to detect and correct transmission errors without requesting retransmission

Answer

It increases the data throughput rate of the digital link

Answer

It reduces the transmitter power required to reach a given distance

Answer

It automatically selects the best digital mode for current band conditions

Question 7

What is PACTOR primarily used for in amateur radio HF communication?

Accepted Answer

High-speed data transfer including email over difficult HF paths

Answer

Digital voice communication on VHF and UHF bands

Answer

Automatic propagation beacon monitoring and reporting

Answer

Position reporting via satellite uplinks