CDC 2EX5X Communications-electronics Journeyman Part 2
Contiuation of 2EX5X Pretest Part 1.
- 1.What principle does the time domain reflectometer use to test cables?
- A.
- 2.What secondary cell is prone to the "memory effect"?
- A.
- 3.What part of the power generation process allows a smooth transition of electrical current between multiple sources and the load?
- A.
- 4.What deployable communication system is a state of the art ground-to-ground communications infrastructure designed to exchanged secure and non-secure voice, data, and video communications via line of sight, satellite, or hard wired resources?
- A.
- 5.What are the two sampling techniques of a digital storage oscilloscope?
- A.
Real-time and repetitive sampling
- B.
Real-time and averaging sampling
- C.
Repetitive and averaging sampling
- D.
Linear and averaging sampling
- 6.What are the two types of intepolation?
- A.
Real-time and linear
- B.
Real-time and sine
- C.
Sine and Linear
- D.
Sine and Repetitive
- 7.Which is not a type of acquisition mode on the digital storage oscilloscope?
- A.
Sample Mode
- B.
Repetitive Mode
- C.
Peak Detection Mode
- D.
Averaging Mode
- 8.What is teh frequency range of an audio signal generator?
- A.
10Hz to 10kHz
- B.
20Hz to 20kHz
- C.
10kHz to 10GHz
- D.
20kHz to 35MHz
- 9.Which one of these is not an application of a radio frequency generator?
- A.
Verifying transmitter frequencies
- B.
Troubleshooting receivers
- C.
Checking antenna systems
- D.
Aligning galvanometers
- 10.A radio frequency generator is used to
- A.
Monitor odd harmonics
- B.
Align telemetry receivers
- C.
Modulate subcarrier oscillators
- D.
Check galvanometer frequency response
- 11.What is the variable voltage range of signals output from the HP 3325B synthesizer/function generator?
- A.
1 mV to 10 V peak-to-peak
- B.
1 mV to 10V peak
- C.
1 V to 10V peak-to-peak
- D.
1V to 10V peak
- 12.The output of the HP 3325B function generator may generate only DC voltages, to a maximum of
- A.
+/- 1V
- B.
+/- 4.5V
- C.
+/- 5V
- D.
+/- 10V
- 13.In using the phase modulation controls of the HP3325B function generator, an input of a +/- 5 V peak would result in what approximate phase deviation?
- A.
+/- 42.5 degrees per volt for sine wave
- B.
+/- 42.5 degrees per volt for square wave
- C.
+/- 425 degrees per volt for sine wave
- D.
+/- 425 degrees per volt for square wave
- 14.The 10:1 power ratio represented by 1 bel can also be represented by how many decibels (db)?
- A.
1 dB
- B.
3dB
- C.
6 dB
- D.
10 dB
- 15.A power reading that uses the abbreviation dBm indicates the
- A.
Ratio of decibels relative to a 1-milliwatt standard
- B.
Ratio of decibels relative to a 1-megawatt standard
- C.
Actual power level expressed in milliwatts
- D.
Actual power level expressed in megawatts
- 16.The measurable frequency and power ranges of the HP 436A power meter are determined by the
- A.
Digital display
- B.
Power sensor
- C.
Power meter
- D.
Interface
- 17.During what operation is the radio frequency blanking output used on the HP 436A power meter?
- A.
While in WATT mode operation
- B.
While in REMOTE mode operation
- C.
During the automatice zeroing operation
- D.
During calibration adjustment operation
- 18.Which measurements is not made with a spectrum analyzer?
- A.
Frequency stability
- B.
Peak-peak voltage
- C.
Amplitude modulation
- D.
Subcarrier oscillator output
- 19.Which measurements do you make with a spectrum analyzer?
- A.
Subcarrier oscillator outputs
- B.
Transducer output voltage
- C.
Time between two events
- D.
Pulse width
- 20.Which electronic counter measurement do you make with a spectrum analyzer?
- A.
Period
- B.
Scaling
- C.
Frequency
- D.
Time interval
- 21.Which electronic counter measurement counts the number of bits in a pulse train?
- A.
Period
- B.
Scaling
- C.
Totalize
- D.
Time interval
- 22.Which are the correct four classes of electronic counters?
- A.
Frequency counters, time counters, microwave counters, and reciprocal counters
- B.
Frequency counters, universal counters, microwave counters, and reciprocal counters
- C.
Frequency counters, universal counters, period counters, and reciprocal counters
- D.
Scaling counters, universal counters, microwave counters, and reciprocal counters
- 23.Which push-button(s) would you select to get 125 ohm impedance on the time domain reflectometer?
- A.
None
- B.
75 ohm only
- C.
125 ohm only
- D.
50 ohm and 75 ohm
- 24.What tye of deflection return on the TDR CRT would indicate a cable "short?'
- A.
No "pip"
- B.
Smear "pip"
- C.
Upward deflections "pip"
- D.
Downward deflections "pip"
- 25.While using a time domain reflectometer (TDR), what cable fault causes delays in pulses of propagation velocity making accurate measurements difficult?
- A.
Short
- B.
Open
- C.
Grounded
- D.
Moisture in cables
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