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G7C - Practical Circuits

General Class

Receivers and transmitters: superheterodyne, direct conversion, SDR, mixers, oscillators, amplifiers

13 questions | Updated: Dec 9, 2025

All G0A G0B G1A G1B G1C G1D G1E G2A G2B G2C G2D G2E G3A G3B G3C G4A G4B G4C G4D G4E G5A G5B G5C G6A G6B G7A G7B G7C G8A G8B G8C G9A G9B G9C G9D
G7C01

What circuit is used to select one of the sidebands from a balanced modulator?
G7C02

What output is produced by a balanced modulator?
G7C03

What is one reason to use an impedance matching transformer at a transmitter output?
G7C04

How is a product detector used?
G7C05

Which of the following is characteristic of a direct digital synthesizer (DDS)?
G7C06

Which of the following is an advantage of a digital signal processing (DSP) filter compared to an analog filter?
G7C07

What term specifies a filter’s attenuation inside its passband?
G7C08

Which parameter affects receiver sensitivity?
G7C09

What is the phase difference between the I and Q RF signals that software-defined radio (SDR) equipment uses for modulation and demodulation?
G7C10

What is an advantage of using I-Q modulation with software-defined radios (SDRs)?
G7C11

Which of these functions is performed by software in a software-defined radio (SDR)?
G7C12

What is the frequency above which a low-pass filter’s output power is less than half the input power?
G7C13

What term specifies a filter’s maximum ability to reject signals outside its passband?