NZART Amateur Examination                     page 5          NZARTX07 Security code 268509

  1. In the block diagram shown, the "low pass filter" must be rated to:
    1. carry the full power output from the station
    2. filter out higher-frequency modulation components for maximum intelligibility
    3. filter out high-amplitude sideband components
    4. emphasise low-speed Morse code output

  2. In the block diagram of the receiver shown, the "RF amplifier":
    1. decreases random fluctuation noise
    2. masks strong noise
    3. should produce little internal noise
    4. changes the signal frequency

  3. In the block diagram of the receiver shown, the "frequency demodulator" could be implemented with a:
    1. product detector
    2. phase-locked loop
    3. full-wave rectifier
    4. low-pass filter
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