electronics-testing-and-troubleshooting Related Question Answers

1. Which test equipment best allows a comparison between input and output signals?





2. The duty cycle of a pulse is determined by which formula?


3. What is the next step after discovering a faulty gate within an IC?





4. The use of a multimeter with digital circuits allows the measurement of:





5. The use of triggered sweep when using an oscilloscope provides more accuracy in which area?





6. The time needed for a pulse to increase from 10% to 90% of its amplitude defines:





7. Which device would best aid in shorted track detection?





8. The three basic steps for fixing a failure are ISOLATE, DIAGNOSE, and REPAIR.



9. An internal logic gate that shorts to either +VCC or ground will cause the inputs or output to be stuck either LOW or FLOATING.



10. A noise problem in a digital circuit is often called a glitch.



11. The time interval between the start of two consecutive pulses is called pulse repetition time.



12. "Train" and "single" is the mode selection for a _______.





13. The use of a logic probe may be improved through the use of a(n) ________.





14. The control of digital circuits is usually achieved with _________.





15. In order for a logic probe to operate, its red and black leads must first be connected to a ________.





16. The ideal test equipment to use for locating shorts in digital circuitry is the ________ and _______.





17. The results of internal IC failures will usually be noticed during the ______ phase of troubleshooting.





18. Erratic or unexplained digital circuit activity is often due to _________.





19. The device that would best aid in open track detection is a(n) ________.





20. A check of all power supply voltages should be made during the ________ method of troubleshooting.





21. A series of gradually decreasing sine wave oscillations is called:





22. The determination of a digital signal's frequency and waveshape is best accomplished with which test equipment?





23. 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?





24. A +5 V PCB power source that has been "pulled down" to a +3.4 V level may be due to:





25. Measurement of pulse width should be taken at a 50% mean of the:





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