Which of the following factors most affects the accuracy of a frequency counter?
- Input attenuator accuracy
- Time base accuracy
- Decade divider accuracy
- Temperature coefficient of the logic
What is an advantage of using a bridge circuit to measure impedance?
- It provides an excellent match under all conditions
- It is relatively immune to drift in the signal generator source
- It is very precise in obtaining a signal null
- It can display results directly in Smith chart format
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?
- 165.2 Hz
- 14.652 kHz
- 146.52 Hz
- 1.4652 MHz
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?
- 14.652 Hz
- 0.1 MHz
- 1.4652 Hz
- 1.4652 kHz
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?
- 146.52 Hz
- 10 Hz
- 146.52 kHz
- 1465.20 Hz
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?
- 100 watts
- 125 watts
- 25 watts
- 75 watts
What do the subscripts of S parameters represent?
- The port or ports at which measurements are made
- The relative time between measurements
- Relative quality of the data
- Frequency order of the measurements
Which of the following is a characteristic of a good DC voltmeter?
- High reluctance input
- Low reluctance input
- High impedance input
- Low impedance input
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?
- There is possibly a short to ground in the feed line
- The transmitter is not properly neutralized
- There is an impedance mismatch between the antenna and feed line
- There is more power going into the antenna
Which of the following describes a method to measure intermodulation distortion in an SSB transmitter?
- Modulate the transmitter with two non-harmonically related radio frequencies and observe the RF output with a spectrum analyzer
- Modulate the transmitter with two non-harmonically related audio frequencies and observe the RF output with a spectrum analyzer
- Modulate the transmitter with two harmonically related audio frequencies and observe the RF output with a peak reading wattmeter
- Modulate the transmitter with two harmonically related audio frequencies and observe the RF output with a logic analyzer
How should an antenna analyzer be connected when measuring antenna resonance and feed point impedance?
- Loosely couple the analyzer near the antenna base
- Connect the analyzer via a high-impedance transformer to the antenna
- Loosely couple the antenna and a dummy load to the analyzer
- Connect the antenna feed line directly to the analyzer's connector
What is the significance of voltmeter sensitivity expressed in ohms per volt?
- The full scale reading of the voltmeter multiplied by its ohms per volt rating will indicate the input impedance of the voltmeter
- 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
- When used as an ohmmeter, the reading in ohms divided by the ohms per volt rating will determine the voltage applied to the circuit
- When used as an ammeter, the full scale reading in amps divided by ohms per volt rating will determine the size of shunt needed
Which S parameter is equivalent to forward gain?
What happens if a dip meter is too tightly coupled to a tuned circuit being checked?
- Harmonics are generated
- A less accurate reading results
- Cross modulation occurs
- Intermodulation distortion occurs
Which of the following can be used as a relative measurement of the Q for a series-tuned circuit?
- The inductance to capacitance ratio
- The frequency shift
- The bandwidth of the circuit's frequency response
- The resonant frequency of the circuit
Which S parameter represents return loss or SWR?
What three test loads are used to calibrate a standard RF vector network analyzer?
- 50 ohms, 75 ohms, and 90 ohms
- Short circuit, open circuit, and 50 ohms
- Short circuit, open circuit, and resonant circuit
- 50 ohms through 1/8 wavelength, 1/4 wavelength, and 1/2 wavelength of coaxial cable