What is the purpose of the "notch filter" found on many HF transceivers?
What is one advantage of selecting the opposite, or "reverse," sideband when receiving CW signals on a typical HF transceiver?
What is normally meant by operating a transceiver in "split" mode?
What reading on the plate current meter of a vacuum tube RF power amplifier indicates correct adjustment of the plate tuning control?
What is a reason to use Automatic Level Control (ALC) with an RF power amplifier?
What type of device is often used to match transmitter output impedance to an impedance not equal to 50 ohms?
What condition can lead to permanent damage to a solid-state RF power amplifier?
What is the correct adjustment for the load or coupling control of a vacuum tube RF power amplifier?
Why is a time delay sometimes included in a transmitter keying circuit?
What is the purpose of an electronic keyer?
Which of the following is a use for the IF shift control on a receiver?
Which of the following is a common use for the dual-VFO feature on a transceiver?
What is one reason to use the attenuator function that is present on many HF transceivers?
What is likely to happen if a transceiver's ALC system is not set properly when transmitting AFSK signals with the radio using single sideband mode?
Which of the following can be a symptom of transmitted RF being picked up by an audio cable carrying AFSK data signals between a computer and a transceiver?
How does a noise blanker work?
What happens as the noise reduction control level in a receiver is increased?