NZART Amateur Examination                     page 6          NZARTX07 Security code 261426

  1. Of two receivers, the one capable of receiving the weakest signal will have:
    1. an RF gain control
    2. the least internally-generated noise
    3. the loudest audio output
    4. the greatest tuning range

  2. A stage in a receiver with input and output circuits tuned to the received frequency is the:
    1. RF amplifier
    2. local oscillator
    3. audio frequency amplifier
    4. detector

  3. A receiver squelch circuit:
    1. automatically keeps the audio output at maximum level
    2. silences the receiver speaker during periods of no received signal
    3. provides a noisy operating environment
    4. is not suitable for pocket-size receivers

  4. In the transmitter block diagram shown, the "power amplifier":
    1. need not have linear characteristics
    2. amplifies the bandwidth of its input signal
    3. must be adjusted during key-up conditions
    4. should be water-cooled

  5. The signal from an amplitude modulated transmitter consists of:
    1. a carrier and two sidebands
    2. a carrier and one sideband
    3. no carrier and two sidebands
    4. no carrier and one sideband
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