E4B01:

Which of the following factors most affects the accuracy of a frequency counter?

  1. Input attenuator accuracy
  2. Time base accuracy
  3. Decade divider accuracy
  4. Temperature coefficient of the logic

E4B02:

What is an advantage of using a bridge circuit to measure impedance?

  1. It provides an excellent match under all conditions
  2. It is relatively immune to drift in the signal generator source
  3. It is very precise in obtaining a signal null
  4. It can display results directly in Smith chart format

E4B03:

If a frequency counter with a specified accuracy of +/- 1.0 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?

  1. 165.2 Hz
  2. 14.652 kHz
  3. 146.52 Hz
  4. 1.4652 MHz

E4B04:

If a frequency counter with a specified accuracy of +/- 0.1 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?

  1. 14.652 Hz
  2. 0.1 MHz
  3. 1.4652 Hz
  4. 1.4652 kHz

E4B05:

If a frequency counter with a specified accuracy of +/- 10 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?

  1. 146.52 Hz
  2. 10 Hz
  3. 146.52 kHz
  4. 1465.20 Hz

E4B06:

How much power is being absorbed by the load when a directional power meter connected between a transmitter and a terminating load reads 100 watts forward power and 25 watts reflected power?

  1. 100 watts
  2. 125 watts
  3. 25 watts
  4. 75 watts

E4B07:

What do the subscripts of S parameters represent?

  1. The port or ports at which measurements are made
  2. The relative time between measurements
  3. Relative quality of the data
  4. Frequency order of the measurements

E4B08:

Which of the following is a characteristic of a good DC voltmeter?

  1. High reluctance input
  2. Low reluctance input
  3. High impedance input
  4. Low impedance input

E4B09:

What is indicated if the current reading on an RF ammeter placed in series with the antenna feed line of a transmitter increases as the transmitter is tuned to resonance?

  1. There is possibly a short to ground in the feed line
  2. The transmitter is not properly neutralized
  3. There is an impedance mismatch between the antenna and feed line
  4. There is more power going into the antenna

E4B10:

Which of the following describes a method to measure intermodulation distortion in an SSB transmitter?

  1. Modulate the transmitter with two non-harmonically related radio frequencies and observe the RF output with a spectrum analyzer
  2. Modulate the transmitter with two non-harmonically related audio frequencies and observe the RF output with a spectrum analyzer
  3. Modulate the transmitter with two harmonically related audio frequencies and observe the RF output with a peak reading wattmeter
  4. Modulate the transmitter with two harmonically related audio frequencies and observe the RF output with a logic analyzer

E4B11:

How should an antenna analyzer be connected when measuring antenna resonance and feed point impedance?

  1. Loosely couple the analyzer near the antenna base
  2. Connect the analyzer via a high-impedance transformer to the antenna
  3. Loosely couple the antenna and a dummy load to the analyzer
  4. Connect the antenna feed line directly to the analyzer's connector

E4B12:

What is the significance of voltmeter sensitivity expressed in ohms per volt?

  1. The full scale reading of the voltmeter multiplied by its ohms per volt rating will indicate the input impedance of the voltmeter
  2. When used as a galvanometer, the reading in volts multiplied by the ohms per volt rating will determine the power drawn by the device under test
  3. When used as an ohmmeter, the reading in ohms divided by the ohms per volt rating will determine the voltage applied to the circuit
  4. When used as an ammeter, the full scale reading in amps divided by ohms per volt rating will determine the size of shunt needed

E4B13:

Which S parameter is equivalent to forward gain?

  1. S11
  2. S12
  3. S21
  4. S22

E4B14:

What happens if a dip meter is too tightly coupled to a tuned circuit being checked?

  1. Harmonics are generated
  2. A less accurate reading results
  3. Cross modulation occurs
  4. Intermodulation distortion occurs

E4B15:

Which of the following can be used as a relative measurement of the Q for a series-tuned circuit?

  1. The inductance to capacitance ratio
  2. The frequency shift
  3. The bandwidth of the circuit's frequency response
  4. The resonant frequency of the circuit

E4B16:

Which S parameter represents return loss or SWR?

  1. S11
  2. S12
  3. S21
  4. S22

E4B17:

What three test loads are used to calibrate a standard RF vector network analyzer?

  1. 50 ohms, 75 ohms, and 90 ohms
  2. Short circuit, open circuit, and 50 ohms
  3. Short circuit, open circuit, and resonant circuit
  4. 50 ohms through 1/8 wavelength, 1/4 wavelength, and 1/2 wavelength of coaxial cable