Chapter 10: Digital Modes

What is an electronic keyer?

• A device for switching antennas from transmit to receive

• A device that assists in manual sending of Morse code

• An interlock to prevent unauthorized use of a radio

Which of the following is a digital communications mode?

• Packet radio

• IEEE 802.11

• FT8

• All these choices are correct

Tags

NGSS.MS-PS4-3

What is CW?

• A type of electromagnetic propagation

• A digital mode used primarily on 2 meter FM

• Another name for a Morse code transmission

• Another name for a Morse code transmission

What does the abbreviation "PSK" mean?

• Pulse Shift Keying

• Phase Shift Keying

• Packet Short Keying

• Phased Slide Keying

Tags

NGSS.MS-PS4-3

How are the transceiver audio input and output connected in a station configured to operate using FT8?

• To a computer running a terminal program and connected to a terminal node controller unit

• To the audio input and output of a computer running WSJT-X software

• To an FT8 conversion unit, a keyboard, and a computer monitor

• To a computer connected to the FT8converter.com website

What signals are used in a computer-radio interface for digital mode operation?

• Receive and transmit mode, status, and location

• Antenna and RF power

• Receive audio, transmit audio, and transmitter keying

• NMEA GPS location and DC power

Tags

NGSS.MS-PS4-3

Which of the following connections is made between a computer and a transceiver to use computer software when operating digital modes?

• Computer "line out" to transceiver push-to-talk

• Computer "line in" to transceiver push-to-talk

• Computer "line in" to transceiver speaker connector

• Computer "line out" to transceiver speaker connector

Tags

NGSS.MS-PS4-3

Which of the following operating activities is supported by digital mode software in the WSJT-X software suite?

• Earth-Moon-Earth

• Weak signal propagation beacons

• Meteor scatter

• All these choices are correct

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-5

What is FT8

• A wideband FM voice mode

• A wideband FM voice mode

• An eight channel multiplex mode for FM repeaters

• A digital slow-scan TV mode with forward error correction and automatic color compensation

Tags

NGSS.MS-PS4-3

What type of signaling uses pairs of audio tones?

• DTMF

• CTCSS

• GPRS

• D-STAR