Radio Amateur Quiz Canadian License

Questions in this category:

• A-005-001-001: How is the positive feedback coupled to the input in a Hartley oscillator?
• A-005-001-002: How is positive feedback coupled to the input in a Colpitts oscillator?
• A-005-001-003: How is positive feedback coupled to the input in a Pierce oscillator?
• A-005-001-004: Why is the Colpitts oscillator circuit commonly used in a VFO?
• A-005-001-005: Why must a very stable reference oscillator be used as part of a phase-locked loop (PLL) frequency synthesizer?
• A-005-001-006: Positive feedback from a capacitive divider indicates the oscillator type is:
• A-005-001-007: In an RF oscillator circuit designed for high stability, the positive feedback is drawn from two capacitors connected in series. These two capacitors would most likely be:
• A-005-001-008: In an oscillator circuit where positive feedback is obtained through a single capacitor in series with the crystal, the type of oscillator is:
• A-005-001-009: A circuit depending on positive feedback for its operation would be a:
• A-005-001-010: An apparatus with an oscillator and a class C amplifier would be:
• A-005-001-011: In an oscillator where positive feedback is provided through a capacitor in series with a crystal, that type of oscillator is a:
• A-005-002-001: The output tuning controls on a transmitter power amplifier with an adjustable PI network:
• A-005-002-002: The purpose of using a centre-tap return connection on the secondary of transmitting tube's filament transformer is to:
• A-005-002-003: In a grounded grid amplifier using a triode vacuum tube, the input signal is applied to:
• A-005-002-004: In a grounded grid amplifier using a triode vacuum tube, the plate is connected to the pi-network through a:
• A-005-002-005: In a grounded grid amplifier using a triode vacuum tube, the plate is connected to a radio frequency choke. The other end of the radio frequency choke connects to the:
• A-005-002-006: In a grounded grid amplifier using a triode vacuum tube, the cathode is connected to a radio frequency choke. The other end of the radio frequency choke connects to the:
• A-005-002-007: In a grounded grid amplifier using a triode vacuum tube, the secondary winding of a transformer is connected directly to the vacuum tube. This transformer provides:
• A-005-002-008: In a grounded grid amplifier using a triode vacuum tube, what would be the approximate B+ voltage required for an output of 400 watts at 400 mA with approximately 50 percent efficiency?
• A-005-002-009: In a grounded grid amplifier using a triode vacuum tube, each side of the filament is connected to a capacitor whose other end is connected to ground. These are:
• A-005-002-010: After you have opened a VHF power amplifier to make internal tuning adjustments, what should you do before you turn the amplifier on?
• A-005-002-011: Harmonics produced in an early stage of a transmitter may be reduced in a later stage by:
• A-005-003-001: In a simple 2 stage CW transmitter circuit, the oscillator stage and the class C amplifier stage are inductively coupled by a RF transformer. Another role of the RF transformer is to:
• A-005-003-002: In a simple 2 stage CW transmitter, current to the collector of the transistor in the class C amplifier stage flows through a radio frequency choke (RFC) and a tapped inductor. The RFC, on the tapped inductor side, is also connected to grounded capacitors. The purpose of the RFC and capacitors is to:
• A-005-003-003: In a simple 2 stage CW transmitter, the transistor in the second stage would act as:
• A-005-003-004: An advantage of keying the buffer stage in a transmitter is that:
• A-005-003-005: As a power amplifier is tuned, what reading on its grid current meter indicates the best neutralization?
• A-005-003-006: What does a neutralizing circuit do in an RF amplifier?
• A-005-003-007: What is the reason for neutralizing the final amplifier stage of a transmitter?
• A-005-003-008: Parasitic oscillations are usually generated due to:
• A-005-003-009: Parasitic oscillations would tend to occur mostly in:
• A-005-003-010: Why is neutralization necessary for some vacuum-tube amplifiers?
• A-005-003-011: Parasitic oscillations in an RF power amplifier may be caused by:
• A-005-004-001: What type of signal does a balanced modulator produce?
• A-005-004-002: How can a single-sideband phone signal be produced?
• A-005-004-003: Carrier suppression in a single-sideband transmitter takes place in:
• A-005-004-004: Transmission with SSB, as compared to conventional AM transmission, results in:
• A-005-004-005: The peak power output of a single-sideband transmitter, when being tested by a two-tone generator is:
• A-005-004-006: What kind of input signal is used to test the amplitude linearity of a single-sideband phone transmitter while viewing the output on an oscilloscope?
• A-005-004-007: When testing the amplitude linearity of a single-sideband transmitter what audio tones are fed into the microphone input and on what kind of kind of instrument is the output observed?
• A-005-004-008: What audio frequencies are used in a two-tone test of the linearity of a single-sideband phone transmitter?
• A-005-004-009: What measurement can be made of a single-sideband phone transmitter's amplifier by performing a two-tone test using an oscilloscope?
• A-005-004-010: How much is the carrier suppressed below peak output power in a single-sideband phone transmission?
• A-005-004-011: What is meant by ""flat topping"" in a single-sideband phone transmission?
• A-005-005-001: In an FM phone signal having a maximum frequency deviation of 3000 Hz either side of the carrier frequency, what is the modulation index, when the modulating frequency is 1000 Hz?
• A-005-005-002: What is the modulation index of an FM phone transmitter producing an instantaneous carrier deviation of 6 kHz when modulated with a 2 kHz modulating frequency?
• A-005-005-003: What is the deviation ratio of an FM phone transmitter having a maximum frequency swing of plus or minus 5 kHz and accepting a maximum modulation rate of 3 kHz?
• A-005-005-004: What is the deviation ratio of an FM phone transmitter having a maximum frequency swing of plus or minus 7.5 kHz and accepting a maximum modulation rate of 3.5 kHz?
• A-005-005-005: When the transmitter is not modulated, or the amplitude of the modulating signal is zero, the frequency of the carrier is called its:
• A-005-005-006: In an FM transmitter system, the amount of deviation from the centre frequency is determined solely by the:
• A-005-005-007: Any FM wave with single-tone modulation has:
• A-005-005-008: Some types of deviation meters work on the principle of:
• A-005-005-009: When using some deviation meters, it is important to know:
• A-005-005-010: What is the significant bandwidth of an FM-phone transmission having a +/- 5-kHz deviation and a 3-kHz modulating frequency?
• A-005-005-011: What is the frequency deviation for a 12.21-MHz reactance-modulated oscillator in a +/- 5-kHz deviation, 146.52-MHz FM-phone transmitter?
• A-005-006-001: If the signals of two repeater transmitters mix together in one or both of their final amplifiers and unwanted signals at the sum and difference frequencies of the original signals are generated and radiated, what is this called?
• A-005-006-002: How does intermodulation interference between two repeater transmitters usually occur?
• A-005-006-003: How can intermodulation interference between two repeater transmitters in close proximity often be reduced or eliminated?
• A-005-006-004: If a receiver tuned to 146.70 MHz receives an intermodulation product signal whenever a nearby transmitter transmits on 146.52, what are the two most likely frequencies for the other interfering signal?
• A-005-006-005: What type of circuit varies the tuning of an amplifier tank circuit to produce FM signals?
• A-005-006-006: What audio shaping network is added at an FM transmitter to attenuate the lower audio frequencies?
• A-005-006-007: Which type of filter would be best to use in a 2-metre repeater duplexer?
• A-005-006-008: The characteristic difference between a phase modulator and a frequency modulator is:
• A-005-006-009: In most modern FM transmitters, to produce a better sound, a compressor and a clipper are placed:
• A-005-006-010: Three important parameters to be verified in an FM transmitter are:
• A-005-006-011: Intermodulation interference products are not typically associated with which of the following:
• A-005-007-001: Maintaining the peak RF output of a SSB transmitter at a relatively constant level requires a circuit called the:
• A-005-007-002: Speech compression associated with SSB transmission implies:
• A-005-007-003: Which of the following functions is not included in a typical digital signal processor?
• A-005-007-004: How many bits are required to provide 256 discrete levels, or a ratio of 256:1?
• A-005-007-005: Adding one bit to the word length, is equivalent to adding ____ dB to the dynamic range of the digitizer:
• A-005-007-006: What do you call the circuit which employs an analog to digital converter, a mathematical transform, a digital to analog converter and a low pass filter?
• A-005-007-007: Which principle is not associated with analog signal processing?
• A-005-007-008: Which of the following is not a method used for peak limiting, in a signal processor?
• A-005-007-009: What is the undesirable result of AF clipping in a speech processor?
• A-005-007-010: Which description is not correct? You are planning to build a speech processor for your transceiver. Compared to AF clipping, RF clipping:
• A-005-007-011: Automatic Level Control (ALC) is another name for:
• A-005-008-001: What digital code consists of elements having unequal length?
• A-005-008-002: Open Systems Interconnection (OSI) model standardizes communications functions as layers within a data communications system. Amateur digital radio systems often follow the OSI model in structure. What is the base layer of the OSI model involving the interconnection of a packet radio TNC to a computer terminal?
• A-005-008-003: What is the purpose of a Cyclic Redundancy Check (CRC)?
• A-005-008-004: What is one advantage of using ASCII rather than Baudot code?
• A-005-008-005: What type of error control system is used in AMTOR ARQ (Mode A)?
• A-005-008-006: What error-correction system is used in AMTOR FEC (Mode B)?
• A-005-008-007: APRS (Automatic Packet Reporting System) does NOT support which one of these functions?
• A-005-008-008: Which algorithm may be used to create a Cyclic Redundancy Check (CRC)?
• A-005-008-009: The designator AX.25 is associated with which amateur radio mode?
• A-005-008-010: How many information bits are included in the Baudot code?
• A-005-008-011: How many information bits are included in the ISO-8859 extension to the ASCII code?
• A-005-009-001: What term describes a wide-band communications system in which the RF carrier varies according to some predetermined sequence?
• A-005-009-002: What is the term used to describe a spread spectrum communications system where the centre frequency of a conventional carrier is changed many times per second in accordance with a pseudorandom list of channels?
• A-005-009-003: What term is used to describe a spread spectrum communications system in which a very fast binary bit stream is used to shift the phase of an RF carrier?
• A-005-009-004: Frequency hopping is used with which type of transmission?
• A-005-009-005: Direct sequence is used with which type of transmission?
• A-005-009-006: Which type of signal is used to produce a predetermined alteration in the carrier for spread spectrum communication?
• A-005-009-007: Why is it difficult to monitor a spread spectrum transmission?
• A-005-009-008: What is frequency hopping spread spectrum?
• A-005-009-009: What is direct-sequence spread spectrum?
• A-005-009-010: Why are received spread-spectrum signals so resistant to interference?
• A-005-009-011: How does the spread-spectrum technique of frequency hopping work?