Systems Engineering

Digital Signal Processing Questions & Answers A 4-bit R/2R ladder digital-to-analog converter uses ________. A. one resistor value B. two resistor values C. three resistor values D. four resistor values - CORRECT ANSWER - B A binary-weighted-input digital-to-analog converter has a feedback resistor, Rf, of 12 k. If 50 uA of current is through the resistor, voltage out of the circuit is ________. A. 0.6 V B. -0.6 V C. 0.1 V D. -0.1 V - CORRECT ANSWER - B A binary-weighted-input digita...

Audio Signals & Digital Signal Processing Questions & Answers air in the ear canal - CORRECT ANSWER - offers greater impedance to the signal coming from the earphone aliasing error - CORRECT ANSWER - in the ADC step. distortion of digital signal caused by too low a sampling rate amplifier - CORRECT ANSWER - increases the signal voltage, current, or both. increased by the addition of power from a direct current source amplifiers are characterized by - CORRECT ANSWER - input signal output...

Digital signal processing Questions & Answers 2 types of feedback cancellation: - CORRECT ANSWER - -notch filters: reduce gain in narrow freq. region -phase cancellation: feedback is detected and opposite phase is produced 2 types of notch filters: - CORRECT ANSWER - -Static filter: only way to change the freq. of notch is to reprogram -Active notch filter: HA monitors output for feedback and creates a notch filter at the frequency that it detects 4 binary numbers....8 binary numbers.......

Digital Signal Processing Questions & Answers (HPF) High Pass Filter or Low-Cut filter - CORRECT ANSWER - Passes high frequencies and attenuates lows. 3 General categories - CORRECT ANSWER - Spectral (um) (Frequency based) Dynamic Range (Amplitude based) Time based & Modulation Acoustic Chamber - CORRECT ANSWER - A highly reverberant room with reflective surfaces. Advantages: Accurate, natural, acoustic reverb Disadvantages: Cost of Space Active - CORRECT ANSWER - Active components are ...

Digital Signal Analyzers Questions & Answers A circularly rotating pattern in a constellation indicates - CORRECT ANSWER - phase noise BER is degraded (increased) by a variety of issues that can occur in the HFC network and customer location, among which are: - CORRECT ANSWER - Excessive attenuation in the path which leads to low C/N and/or low MER In-band interference from radio signals such as HAM or CB radios Burst or impulse interference from power supplies and motors Non-linear ampli...

Digital Signal Processing Questions & Answers Advantages of digital signals - CORRECT ANSWER - - immune to degradation when copied - easier to apply signal processing - easier to store Analogue to Digital Conversion and Reconstruction (ADC) - CORRECT ANSWER - Analog input (sound) ADC (sampler, discrete-time signal, quantizer) DSP (digital input to digital output - compression, wind noise filter, adaptive microphones, etc.) Reconstruction (DAC to low-pass filter) Analog output Analogue ...

Digital Signal Processing Questions & Answers 1 bit contains 2 possible values of - CORRECT ANSWER - 0 and 1 (2^1) A 4-bit system (2^4) has how many values? - CORRECT ANSWER - 16 values A location of maximum reduction in sensitivity? - CORRECT ANSWER - Null Point A low-level inaudible noise that occurs as a result of the quantization process - CORRECT ANSWER - Quantization Noise A specific change in input does not equal the same amount of change to output past the kneepoint - CORRECT ANSWE...

Digital Signal Processing Questions & Answers A AND B - CORRECT ANSWER - A . B A OR B - CORRECT ANSWER - A + B AND gate - CORRECT ANSWER - D shape If A AND B are 1 output = 1 associative law - CORRECT ANSWER - A . (B.C) = (A . B) C carry out - CORRECT ANSWER - an additional output of a counter which allows several digital displays to be connected together to output a number several digits long this output is connected to the clock input of the next counter - each time its signal reaches ...

Digital Signal Processing Terms Questions & Answers adder - CORRECT ANSWER - -Performs addition of two signal sequences to form another sequence. -this operation is memoryless. amplitude scaling - CORRECT ANSWER - ____ of a signal by a constant A is accomplished by multiplying each sample of the signal by A antisymmetric - CORRECT ANSWER - x(n) is ____ (odd) if x(-n) = -x(n) aperiodic - CORRECT ANSWER - A signal that does not repeats its pattern over a period autocorrelation - CORRECT ...