T7_Practical_Circuits_part_1

Which term describes the ability of a receiver to detect the presence of a signal?

• Linearity
• Sensitivity
• Sensitivity
• Total Harmonic Distortion

What is a transceiver?

• A device that combines a receiver and transmitter
• A device for matching feed line impedance to 50 ohms
• A device for automatically sending and decoding Morse code
• A device for converting receiver and transmitter frequencies to another band

Which of the following is used to convert a signal from one frequency to another?

• Phase splitter
• Mixer
• Inverter
• Amplifier

Which term describes the ability of a receiver to discriminate between multiple signals?

• Discrimination ratio
• Sensitivity
• Selectivity
• Harmonic distortion

What is the name of a circuit that generates a signal at a specific frequency?

• Reactance modulator
• Phase modulator
• Low-pass filter
• Oscillator

What device converts the RF input and output of a transceiver to another band?

• High-pass filter
• Low-pass filter
• Transverter
• Phase converter

What is the function of a transceiver’s PTT input?

• Input for a key used to send CW
• Switches transceiver from receive to transmit when grounded
• Provides a transmit tuning tone when grounded
• Input for a preamplifier tuning tone

Which of the following describes combining speech with an RF carrier signal?

• Impedance matching
• Oscillation
• Modulation
• Low-pass filtering

What is the function of the SSB/CW-FM switch on a VHF power amplifier?

• Change the mode of the transmitted signal
• Set the amplifier for proper operation in the selected mode
• Change the frequency range of the amplifier to operate in the proper segment of the band
• Reduce the received signal noise

What device increases the transmitted output power from a transceiver?

• A voltage divider
• An RF power amplifier
• An impedance network
• All these choices are correct