Canadian Basic Qualification pool, section B-003-007

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Subelement B-003

B-003

Section B-003-007

Section B-003-007

B-003-007-001

Which of the following is a function of the sound card interface in a station operating computer-based digital modes?

A.
To demodulate the transmitted signal
B.
To convert the received digital signal from the transceiver into an analog signal for the computer
C.
To amplify the digital signals to be sent by the transceiver
Correct Answer
D.
To convert the received analog audio signal from the transceiver into a digital signal for the computer

B-003-007-001

There are two types of sound card interfaces. The original setup provides audio connections between the transceiver and a sound card (internal or external to the computer). The modern setup is a specialized external sound card with audio connections to the transceiver and a USB cable to the computer. Both types of interfaces typically include transformers in the audio connections to properly isolate the transceiver from the computer and are generally capable of switching the transmitter into transmit mode when required. Some recent transceivers include a sound card (audio codec) and an interface; then, a single USB cable connects the transceiver to the computer.

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

Tags: none

B-003-007-002

Which of the following is a function of the sound card interface in a station operating computer-based digital modes?

Correct Answer
A.
To convert the digital signal from the computer into an audio signal that can be transmitted
B.
To demodulate the transmitted signal
C.
To amplify the digital signals to be sent by the transceiver
D.
To convert the analog signal from the computer into a digital signal that can be transmitted

B-003-007-002

There are two types of sound card interfaces. The original setup provides audio connections between the transceiver and a sound card (internal or external to the computer). The modern setup is a specialized external sound card with audio connections to the transceiver and a USB cable to the computer. Both types of interfaces typically include transformers in the audio connections to properly isolate the transceiver from the computer and are generally capable of switching the transmitter into transmit mode when required. Some recent transceivers include a sound card (audio codec) and an interface; then, a single USB cable connects the transceiver to the computer.

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

Tags: none

B-003-007-003

Which of the following is one function of most sound card interfaces in a station operating computer-based digital modes?

A.
Display the transmit frequency
B.
Modulate the received signal
C.
Translate the digital signal into alphanumeric characters
Correct Answer
D.
Switch the transceiver between receive and transmit modes

B-003-007-003

There are two types of sound card interfaces. The original setup provides audio connections between the transceiver and a sound card (internal or external to the computer). The modern setup is a specialized external sound card with audio connections to the transceiver and a USB cable to the computer. Both types of interfaces typically include transformers in the audio connections to properly isolate the transceiver from the computer and are generally capable of switching the transmitter into transmit mode when required. Some recent transceivers include a sound card (audio codec) and an interface; then, a single USB cable connects the transceiver to the computer.

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

Tags: none

B-003-007-004

Which of the following is a function of the sound card interface in a station operating computer-based digital modes?

A.
To demodulate the transmitted signal
B.
To amplify the digital signals to be sent by the transceiver
C.
To provide radio frequency coupling between a computer and a transceiver
Correct Answer
D.
To provide audio frequency coupling between a computer and a transceiver

B-003-007-004

There are two types of sound card interfaces. The original setup provides audio connections between the transceiver and a sound card (internal or external to the computer). The modern setup is a specialized external sound card with audio connections to the transceiver and a USB cable to the computer. Both types of interfaces typically include transformers in the audio connections to properly isolate the transceiver from the computer and are generally capable of switching the transmitter into transmit mode when required. Some recent transceivers include a sound card (audio codec) and an interface; then, a single USB cable connects the transceiver to the computer.

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

Tags: none

B-003-007-005

Why are isolation transformers often included in the sound card interface of a station operating computer-based digital modes?

A.
To match the impedance of the computer output signal to the impedance of the input of the computer
Correct Answer
B.
To prevent the coupling of the transceiver and computer from introducing hum and interference into the transmitted signals
C.
To increase the signal voltage generated by the computer to the level required by the transceiver
D.
To provide a source of DC power for the circuitry in the interface

B-003-007-005

There are two types of sound card interfaces. The original setup provides audio connections between the transceiver and a sound card (internal or external to the computer). The modern setup is a specialized external sound card with audio connections to the transceiver and a USB cable to the computer. Both types of interfaces typically include transformers in the audio connections to properly isolate the transceiver from the computer and are generally capable of switching the transmitter into transmit mode when required. Some recent transceivers include a sound card (audio codec) and an interface; then, a single USB cable connects the transceiver to the computer.

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

Tags: none

B-003-007-006

Why are some transceivers capable of operating computer-based digital modes without a separate sound card?

A.
Because they support CAT (Computer Aided Transceiver)
Correct Answer
B.
Because they incorporate an audio codec
C.
Because they provide a USB connector
D.
Because digital signal processing (DSP) is built-in

B-003-007-006

There are two types of sound card interfaces. The original setup provides audio connections between the transceiver and a sound card (internal or external to the computer). The modern setup is a specialized external sound card with audio connections to the transceiver and a USB cable to the computer. Both types of interfaces typically include transformers in the audio connections to properly isolate the transceiver from the computer and are generally capable of switching the transmitter into transmit mode when required. Some recent transceivers include a sound card (audio codec) and an interface; then, a single USB cable connects the transceiver to the computer.

Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.

Tags: none