How are the capacitors and inductors of a low-pass filter Pi-network arranged between the network's input and output?

  1. Two inductors are in series between the input and output, and a capacitor is connected between the two inductors and ground
  2. Two capacitors are in series between the input and output, and an inductor is connected between the two capacitors and ground
  3. An inductor is connected between the input and ground, another inductor is connected between the output and ground, and a capacitor is connected between the input and output
  4. A capacitor is connected between the input and ground, another capacitor is connected between the output and ground, and an inductor is connected between input and output


Which of the following is a property of a T-network with series capacitors and a parallel shunt inductor?

  1. It is a low-pass filter
  2. It is a band-pass filter
  3. It is a high-pass filter
  4. It is a notch filter


What advantage does a series-L Pi-L-network have over a series-L Pi-network for impedance matching between the final amplifier of a vacuum-tube transmitter and an antenna?

  1. Greater harmonic suppression
  2. Higher efficiency
  3. Does not require a capacitor
  4. Greater transformation range


How does an impedance-matching circuit transform a complex impedance to a resistive impedance?

  1. It introduces negative resistance to cancel the resistive part of impedance
  2. It introduces transconductance to cancel the reactive part of impedance
  3. It cancels the reactive part of the impedance and changes the resistive part to a desired value
  4. Reactive currents are dissipated in matched resistances


Which filter type is described as having ripple in the passband and a sharp cutoff?

  1. A Butterworth filter
  2. An active LC filter
  3. A passive op-amp filter
  4. A Chebyshev filter


What are the distinguishing features of an elliptical filter?

  1. Gradual passband rolloff with minimal stop band ripple
  2. Extremely flat response over its pass band with gradually rounded stop band corners
  3. Extremely sharp cutoff with one or more notches in the stop band
  4. Gradual passband rolloff with extreme stop band ripple


Which describes a Pi-L-network used for matching a vacuum tube final amplifier to a 50-ohm unbalanced output?

  1. A Phase Inverter Load network
  2. A Pi-network with an additional series inductor on the output
  3. A network with only three discrete parts
  4. A matching network in which all components are isolated from ground


Which of the following factors has the greatest effect on the bandwidth and response shape of a crystal ladder filter?

  1. The relative frequencies of the individual crystals
  2. The DC voltage applied to the quartz crystal
  3. The gain of the RF stage preceding the filter
  4. The amplitude of the signals passing through the filter


What is a crystal lattice filter?

  1. A power supply filter made with interlaced quartz crystals
  2. An audio filter made with four quartz crystals that resonate at 1kHz intervals
  3. A filter using lattice-shaped quartz crystals for high-Q performance
  4. A filter with narrow bandwidth and steep skirts made using quartz crystals


Which of the following filters would be the best choice for use in a 2 meter band repeater duplexer?

  1. A crystal filter
  2. A cavity filter
  3. A DSP filter
  4. An L-C filter


Which of the following describes a receiving filter's ability to reject signals occupying an adjacent channel?

  1. Passband ripple
  2. Phase response
  3. Shape factor
  4. Noise factor


What is one advantage of a Pi-matching network over an L-matching network consisting of a single inductor and a single capacitor?

  1. The Q of Pi-networks can be controlled
  2. L-networks cannot perform impedance transformation
  3. Pi-networks are more stable
  4. Pi-networks provide balanced input and output