Online courses for the ham radio license exams.

General Class Exam Question Pool

effective 7/01/2015 thru 6/30/2019

    Unseen questions
    Weak questions
    Review questions
    Learned questions
    Incorrect answer choices  

2015-G7C: Receivers and transmitters; filters, oscillators

2015-G7C01: Which of the following is used to process signals from the balanced modulator then send them to the mixer in some single sideband phone transmitters?


Carrier oscillator

IF amplifier

RF amplifier

2015-G7C02: Which circuit is used to combine signals from the carrier oscillator and speech amplifier then send the result to the filter in some single sideband phone transmitters?

Balanced modulator



IF amplifier

2015-G7C03: What circuit is used to process signals from the RF amplifier and local oscillator then send the result to the IF filter in a superheterodyne receiver?


Balanced modulator

IF amplifier


2015-G7C04: What circuit is used to combine signals from the IF amplifier and BFO and send the result to the AF amplifier in some single sideband receivers?

Product detector

RF oscillator

IF filter

Balanced modulator

2015-G7C05: Which of the following is an advantage of a transceiver controlled by a direct digital synthesizer (DDS)?

Variable frequency with the stability of a crystal oscillator

Wide tuning range and no need for band switching

Relatively high power output

Relatively low power consumption

2015-G7C06: What should be the impedance of a low-pass filter as compared to the impedance of the transmission line into which it is inserted?

About the same

Substantially higher

Substantially lower

Twice the transmission line impedance

2015-G7C07: What is the simplest combination of stages that implement a superheterodyne receiver?

HF oscillator, mixer, detector

RF amplifier, detector, audio amplifier

RF amplifier, mixer, IF discriminator

HF oscillator, prescaler, audio amplifier

2015-G7C08: What type of circuit is used in many FM receivers to convert signals coming from the IF amplifier to audio?


Product detector

Phase inverter


2015-G7C09: Which of the following is needed for a Digital Signal Processor IF filter?

All of the these choices are correct

An analog to digital converter

A digital to analog converter

A digital processor chip

2015-G7C10: How is Digital Signal Processor filtering accomplished?

By converting the signal from analog to digital and using digital processing

By using direct signal phasing

By differential spurious phasing

By converting the signal from digital to analog and taking the difference of mixing products

2015-G7C11: What is meant by the term "software defined radio" (SDR)?

A radio in which most major signal processing functions are performed by software

A radio that provides computer interface for automatic logging of band and frequency

A radio that uses crystal filters designed using software

A computer model that can simulate performance of a radio to aid in the design process

Color key:
● = Unseen
● = Weak
● = Review
● = Learned
● = Incorrect answer
Previous group:
2015-G7B: Digital circuits; amplifiers and oscillators
Back to index:
General Class Exam Question Pool
Next group:
2015-G8A: Carriers and modulation: AM; FM; single sideband; modulation envelope; digital modulation; overmodulation
Home     What is ham radio?     Which exam to take?     Study tips     Where to take the exam?     Frequency Asked Questions (FAQ)     How to     How much math?     Trouble with practice exams     Feedback     Prices     Ham It Forward     Free Extra course for active volunteer examiners     Refund policy     Privacy policy    Terms and conditions     Bumper sticker     Advertise with us     The Ham band     Rate us     Question pools     Course structure     Survivalists     Documents     facebook     Google+     Contact us     Christina's story     TestOnline     Links

The best study method, customer support, and guarantee in the industry!

A TestOnline website.  Copyright © 1998-, HamTestOnline™.  All rights reserved.