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 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

E4B03:

Which S parameter is equivalent to forward gain?

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

E4B04:

Which S parameter represents input port return loss or reflection coefficient (equivalent to VSWR)?

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

E4B05:

What three test loads are used to calibrate an 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

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 can be used to measure the Q of 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

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 methods measures intermodulation distortion in an SSB transmitter?

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

E4B11:

Which of the following can be measured with a vector network analyzer?

1. Input impedance
2. Output impedance
3. Reflection coefficient
4. All these choices are correct