Technician T7A: Inside a transceiver
These are the 11 official questions in group T7A of the 2026–2030 Technician question pool, with the correct answer marked and a plain-English explanation of why it's right. The real exam asks one question from this group.
- T7A01Question 1
Which term describes the ability of a receiver to detect the presence of a signal?
- ARF gain
- BSensitivity Correct
- CSelectivity
- DTotal Harmonic Distortion
Why: Sensitivity is how well a receiver detects weak signals.
- T7A02Question 2
What is a transceiver?
- AA device that combines a receiver and transmitter Correct
- BA device for matching feed line impedance to 50 ohms
- CA device for automatically sending and decoding Morse code
- DA device for converting receiver and transmitter frequencies to another band
Why: A transceiver combines a receiver and a transmitter.
- T7A03Question 3
Which of the following is used to convert a signal from one frequency to another?
- APhase splitter
- BMixer Correct
- CInverter
- DAmplifier
Why: A mixer combines signals to convert one frequency to another.
- T7A04Question 4
Which term describes the ability of a receiver to discriminate between multiple signals?
- ADiscrimination ratio
- BSensitivity
- CSelectivity Correct
- DHarmonic distortion
Why: Selectivity is the ability to separate one signal from others nearby.
- T7A05Question 5
What is the name of a circuit that generates a signal at a specific frequency?
- AReactance modulator
- BPhase modulator
- CLow-pass filter
- DOscillator Correct
Why: An oscillator generates a signal at a specific frequency.
- T7A06Question 6
What device converts the RF input and output of a transceiver to another band?
- AHigh-pass filter
- BLow-pass filter
- CTransverter Correct
- DPhase converter
Why: A transverter converts a transceiver's RF to and from another band.
- T7A07Question 7
What is the function of a transceiver’s PTT input?
- AInput for a key used to send CW
- BSwitches transceiver from receive to transmit when grounded Correct
- CProvides a transmit tuning tone when grounded
- DInput for a preamplifier tuning tone
Why: Grounding the PTT line switches the radio to transmit.
- T7A08Question 8
Which of the following describes combining speech with an RF carrier signal?
- AImpedance matching
- BOscillation
- CModulation Correct
- DLow-pass filtering
Why: Modulation is combining speech with the RF carrier.
- T7A09Question 9
What is the function of the switch which selects either SSB or CW-FM on some VHF power amplifiers?
- AChange the mode of the transmitted signal
- BSet the amplifier for proper operation in the selected mode Correct
- CChange the frequency range of the amplifier to operate in the proper segment of the band
- DReduce the received signal noise
Why: SSB and CW/FM need different amplifier settings, and the switch sets it up correctly for the mode.
- T7A10Question 10
What can be added to the output of a transceiver to increase the transmitted output power?
- AA potentiometer
- BAn RF power amplifier Correct
- CAn impedance multiplier
- DAll these choices are correct
Why: An RF power amplifier raises the transmitted output power.
- T7A11Question 11
What is the function of the Variable Frequency Oscillator (VFO) circuit in a transceiver?
- ASet the receive and transmit frequency Correct
- BProvide automatic frequency control
- CInject a variable frequency to allow CW reception
- DGenerate and demodulate single sideband signals
Why: The VFO sets the receive and transmit frequency.