Soft Test Asia - Training

Training: Mixed Signal Knowledge Evaluation
Take the Challenge!

	1. Which of the following is not normally used in a modern mixed signal test system?
	a) algorithmic pattern generator b) digital vector memory c) digital signal processor (DSP) d) waveform storage memory
	2. Pin Electronics is normally used to drive
	a) digital DUT pins b) analog DUT pins
	3. Decibels uses which base of logarithm?
	a) base 10 b) base 2 c) base e
	4. The sine of an angle in a right triangle is the ratio of sides given by
	a) opposite over adjacent b) opposite over hypotenuse c) adjacent over hypotenuse
	5. In a Fourier series, the 2nd harmonic of a 4500Hz signal is found at a frequency of
	a) 2250Hz b) 4700Hz c) 9000KHz d) 9000Hz
	6. Sampling can be used to get information about all of the following except:
	a) the amplitude of a signal b) the Nyquist frequency of a signal c) the magnitude of a signal at various frequencies d) the phase of a signal at various frequencies
	7. The Fast Fourier Transform has which advantage over the Discrete Fourier Transform?
	a) it uses N2 calculations b) it is more accurate c) it is faster d) it yields more information about a signal
	8. Time Windowing functions can be used to reduce
	a) aliasing b) spectral leakage c) distortion d) quantization error
	9. Coherent testing
	a) reduces the sample frequency b) requires an integer number of signal cycles c) requires samples from more than one cycle of a signal d) causes spectral leakage
	10. Device X has a measured harmonic distortion (THD) = -84.7dB and device Y has THD = -86.4dB. The device with more distortion is
	a) device X b) device Y
	11. A filter with a high Q is
	a) more frequency selective than a filter with a low Q b) less frequency selective than a filter with a low Q
	12. Differential nonlinearity for an analog to digital or digital to analog converter is
	a) a measure of the "large scale" linearity error b) a measure of the "small scale" linearity error c) not a valid data converter specification
	13. Integral nonlinearity (INL) for a digital to analog converter
	a) is the error of a specific output value relative to a straight line b) is the same as DAC gain error c) is the same as differential nonlinearity d) causes non-monotonic behavior
	14. A DAC LSB is calculated as
	a) (Full scale output - zero scale output) * (2bits - 1) b) (Full scale output - zero scale output) / (2bits - 1) c) (Full scale output - zero scale output) / 2bits d) Full scale output / bits
	15. A 14 bit ADC has a resolution of one part in
	a) 14 b) 196 c) 16384 d) 14000
	16. Which of the following is a valid unit of measure for ADC offset voltage error?
	a) ppm of full scale range b) LSBs c) % full scale d) all of the above
	17. Histogram testing with a ramp input to an ADC is used to measure
	a) static DNL and INL b) dynamic DNL and INL c) SNR and THD d) none of the above
	18. An anti aliasing filter is used to
	a) remove signal components above the Shannon frequency b) remove signal components above the Nyquist frequency c) remove signal components above the fundamental frequency d) decrease test time
	19. To test a DAC for SNR, the DAC output signal may need
	a) a low pass filter b) a notch filter c) attenuation d) amplification e) any or all of the above
	20. The typical ATE waveform digitizer can test an analog signal for 96dB signal to noise ratio without any additional signal conditioning circuitry.
	a) True b) False


Digital Testing Course	Mixed Signal Testing Course