Electronics-Testing and Troubleshooting
Electronics-Testing and Troubleshooting
1. A series of gradually decreasing sine wave oscillations is called:
- ringing
- slew
- overshooting
- undershooting
2. The determination of a digital signal's frequency and waveshape is best accomplished with which test equipment?
- an oscilloscope
- a multimeter
- a spectrum analyzer
- a frequency generator
3. A logic probe is placed on the output of a gate and the display indicator is dim. A logic pulser is used on each of the input terminals, but the output indication does not change. What is wrong?
- The dim indication on the logic probe indicates that the supply voltage is probably low.
- The output of the gate appears to be open.
- The LOW indication is the result of a bad ground connection on the logic probe.
- The gate is a tri-state device.
4. A +5 V PCB power source that has been "pulled down" to a +3.4 V level may be due to:
- a circuit open
- a faulty regulator
- the half-split method
- a circuit short
5. Measurement of pulse width should be taken at a 50% mean of the:
- overshoot and undershoot
- rise and fall
- damping and ringing
- leading and trailing amplitude
6. Which test equipment best allows a comparison between input and output signals?
- an oscilloscope
- a logic probe
- a spectrum analyzer
- a multitrace oscilloscope
7. What is the next step after discovering a faulty gate within an IC?
- repair the gate
- resolder the tracks
- replace the IC involved
- recheck the power source
8. The use of a multimeter with digital circuits allows the measurement of:
- pulse width
- voltage or resistance
- current
- pulse trains
9. The use of triggered sweep when using an oscilloscope provides more accuracy in which area?
- frequency
- amplitude
- graticule activity
- timing
10. The time needed for a pulse to increase from 10% to 90% of its amplitude defines:
- pulse width
- propagation delay
- rise time
- duty cycle