FCCライセンス 5月 22 2024 SUBELEMENT T7A – PRACTICAL CIRCUITS – SUBELEMENT T7A – PRACTICAL CIRCUITS – T7A – Station equipment: receivers, transceivers, transmitter amplifiers, receive amplifiers, transverters; Basic radio circuit concepts and terminology: sensitivity, selectivity, mixers, oscillators, PTT, modulation 1 / 11 T7A01Which term describes the ability of a receiver to detect the presence of a signal? Linearity Sensitivity Selectivity Total Harmonic Distortion 2 / 11 T7A02What 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 3 / 11 T7A03Which of the following is used to convert a signal from one frequency to another? Phase splitter Mixer Inverter Amplifier 4 / 11 T7A04Which term describes the ability of a receiver to discriminate between multiple signals? Discrimination ratio Sensitivity Selectivity Harmonic distortion 5 / 11 T7A05What is the name of a circuit that generates a signal at a specific frequency? Reactance modulator Phase modulator Low-pass filter Oscillator 6 / 11 T7A06What device converts the RF input and output of a transceiver to another band? High-pass filter Low-pass filter Transverter Phase converter 7 / 11 T7A07What 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 8 / 11 T7A08Which of the following describes combining speech with an RF carrier signal? Impedance matching Oscillation Modulation Low-pass filtering 9 / 11 T7A09What 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 10 / 11 T7A10What device increases the transmitted output power from a transceiver? A voltage divider An RF power amplifier An impedance network All these choices are correct 11 / 11 T7A11Where is an RF preamplifier installed? Between the antenna and receiver At the output of the transmitter power amplifier Between the transmitter and the antenna tuner At the output of the receiver audio amplifier Your score isThe average score is 0% 0% Restart quiz Ed 0 コメント
