Station Operation and setup
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General Class Exam Question Pool

effective 7/01/2011 thru 6/30/2015

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G4A-2011: Station Operation and setup

G4A01-2011: What is the purpose of the "notch filter" found on many HF transceivers?

To reduce interference from carriers in the receiver passband

To restrict the transmitter voice bandwidth

To eliminate receiver interference from impulse noise sources

To enhance the reception of a specific frequency on a crowded band



G4A02-2011: What is one advantage of selecting the opposite or "reverse" sideband when receiving CW signals on a typical HF transceiver?

It may be possible to reduce or eliminate interference from other signals

Interference from impulse noise will be eliminated

More stations can be accommodated within a given signal passband

Accidental out of band operation can be prevented



G4A03-2011: What is normally meant by operating a transceiver in "split" mode?

The transceiver is set to different transmit and receive frequencies

The radio is operating at half power

The transceiver is operating from an external power source

The transmitter is emitting a SSB signal, as opposed to DSB operation



G4A04-2011: What reading on the plate current meter of a vacuum tube RF power amplifier indicates correct adjustment of the plate tuning control?

A pronounced dip

A pronounced peak

No change will be observed

A slow, rhythmic oscillation



G4A05-2011: What is a purpose of using Automatic Level Control (ALC) with a RF power amplifier?

To reduce distortion due to excessive drive

To balance the transmitter audio frequency response

To reduce harmonic radiation

To increase overall efficiency



G4A06-2011: What type of device is often used to enable matching the transmitter output to an impedance other than 50 ohms?

Antenna coupler

Balanced modulator

SWR Bridge

Q Multiplier



G4A07-2011: What condition can lead to permanent damage when using a solid-state RF power amplifier?

Excessive drive power

Exceeding the Maximum Usable Frequency

Low input SWR

Shorting the input signal to ground



G4A08-2011: What is the correct adjustment for the load or coupling control of a vacuum tube RF power amplifier?

Maximum power output without exceeding maximum allowable plate current

Minimum SWR on the antenna

Minimum plate current without exceeding maximum allowable grid current

Highest plate voltage while minimizing grid current



G4A09-2011: Why is a time delay sometimes included in a transmitter keying circuit?

To allow time for transmit-receive changeover operations to complete properly before RF output is allowed

To prevent stations from talking over each other

To allow the transmitter power regulators to charge properly

To allow time for a warning signal to be sent to other stations



G4A10-2011: What is the purpose of an electronic keyer?

Automatic generation of strings of dots and dashes for CW operation

Automatic transmit/receive switching

VOX operation

Computer interface for PSK and RTTY operation



G4A11-2011: Which of the following is a use for the IF shift control on a receiver?

To avoid interference from stations very close to the receive frequency

To change frequency rapidly

To permit listening on a different frequency from that on which you are transmitting

To tune in stations that are slightly off frequency without changing your transmit frequency



G4A12-2011: Which of the following is a common use for the dual VFO feature on a transceiver?

To permit ease of monitoring the transmit and receive frequencies when they are not the same

To allow transmitting on two frequencies at once

To permit full duplex operation, that is transmitting and receiving at the same time

To facilitate computer interface



G4A13-2011: What is one reason to use the attenuator function that is present on many HF transceivers?

To reduce signal overload due to strong incoming signals

To reduce the transmitter power when driving a linear amplifier

To reduce power consumption when operating from batteries

To slow down received CW signals for better copy



G4A14-2011: How should the transceiver audio input be adjusted when transmitting PSK31 data signals?

So that the transceiver ALC system does not activate

So that the transceiver is at maximum rated output power

So that the transceiver operates at no more than 25% of rated power

So that the transceiver ALC indicator shows half scale





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