Electronics And Communication Test Preparations On Combinational Logic Circuits Part 1

Test Preparation on Electronics And Communication Test Preparations On Combinational Logic Circuits Part 1

1.

A series of gradually decreasing sine wave oscillations is called:

1ringing
2slew
3overshooting
4undershooting

2.

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

1an oscilloscope
2a multimeter
3a spectrum analyzer
4a 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?

1The dim indication on the logic probe indicates that the supply voltage is probably low.
2The output of the gate appears to be open.
3The LOW indication is the result of a bad ground connection on the logic probe.
4The 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:"

1a circuit open
2a faulty regulator
3the half-split method
4a circuit short

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