Ham Radio General Class Test Digital Modes and Data Communications

Question 1

Which digital mode uses 15-second structured time slots and is most widely used for weak-signal HF communication?

Accepted Answer

FT8

Answer

PSK31

Answer

RTTY

Answer

Olivia

Question 2

What is the standard frequency shift used for RTTY operation on HF bands?

Accepted Answer

170 Hz

Answer

500 Hz

Answer

1000 Hz

Answer

3000 Hz

Question 3

What is the approximate bandwidth occupied by a PSK31 signal?

Accepted Answer

31 Hz

Answer

500 Hz

Answer

2.4 kHz

Answer

6 kHz

Question 4

At what standard data rate is packet radio typically operated on HF bands?

Accepted Answer

300 baud

Answer

1200 baud

Answer

9600 baud

Answer

56000 baud

Question 5

What does APRS stand for?

Accepted Answer

Automatic Packet Reporting System

Answer

Amateur Position Relay Station

Answer

Automatic Propagation Relay System

Answer

Amateur Packet Radio Service

Question 6

What type of modulation does PSK31 use?

Accepted Answer

Phase shift keying

Answer

Frequency shift keying

Answer

Amplitude shift keying

Answer

Single sideband suppressed carrier

Question 7

Which digital mode is designed for propagation testing using extremely low power and automatically uploads reception reports to an internet database?

Accepted Answer

WSPR

Answer

FT8

Answer

RTTY

Answer

PSK63