RF and IF Processing Tradeoffs MCQ

Test your knowledge with important RF and IF Processing Tradeoffs MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more RF and IF Processing Tradeoffs MCQs at Bissoy

• The useful dynamic range applicable for antenna, RF/IF conversion, and ADC’s is given by the ratio of smallest processable signal to the smallest detectable signal.
  ক

  True

  খ

  False
• The Nyquist criterion states that the sampling frequency of a band limited analog waveform must be at least ______ component to properly reconstruct the signal.
  ক

  half the maximum frequency

  খ

  twice the maximum frequency

  গ

  half the minimum frequency

  ঘ

  twice the minimum frequency
• ____ fixes the input power dynamic range such that there are no sinusoidal RF conversion artifacts in the output.
  ক

  Noise Figure

  খ

  Two tone intermodulation product

  গ

  Harmonics

  ঘ

  SFDR
• Which of the following is not a challenge to RF/IF conversion stage in military application?
  ক

  Low phase noise

  খ

  Tunable pre-selector

  গ

  Single RF/IF up-down conversion

  ঘ

  Fast tuning synthesizers
• Electronically Programmable Analog Components are also called as ____
  ক

  FPGA

  খ

  FPAA

  গ

  Gate Array ASIC

  ঘ

  Cell based ASIC
• 10.Which of the following modulation type is incompatible with class C operation?
  ক

  Frequency modulation

  খ

  BPSK

  গ

  QPSK

  ঘ

  QAM
• amplifiers tend to be ____ amplifiers.
  ক

  class A

  খ

  class B

  গ

  class C

  ঘ

  class AB
• Superconductors use ____ to maintain working temperature near _____
  ক

  heat sinks, 70K

  খ

  open cooling system, 80K

  গ

  forced air, 75K

  ঘ

  closed cooling system, 70K
• Superconducting analog filters can reduce noise and interference introduced by wide bandwidth of SDR architecture.
  ক

  True

  খ

  False
• RF MEMS allows selection of ____ and ____, increasing the degree of freedom in design process.
  ক

  digital circuit and reverse engineering

  খ

  analog circuit and reverse engineering

  গ

  digital circuit and reengineering

  ঘ

  analog circuit and reengineering
• The industry standard figure of merit for an RF switch is ______
  ক

  R0C1

  খ

  R1C0

  গ

  C0R1

  ঘ

  C1R0
• In resonators with nanoscale I-beams, which factor does not affect the mechanical frequencies of I-beams?
  ক

  Size

  খ

  Density

  গ

  Stiffness

  ঘ

  Distance between beam and bottom of the cavity
• Which of these is not a technique used to induce sharp resonance in resonators?
  ক

  Rigidity

  খ

  Bulk

  গ

  Acoustic

  ঘ

  Piezoelectric
• RF MEMS gives _______ alternative to electronic switching circuits.
  ক

  an electromechanical

  খ

  a mechanical

  গ

  an electro-dynamic

  ঘ

  an interconnected
• RF integrated circuits generally comprise of _____
  ক

  resonators and resistors

  খ

  resistors

  গ

  diodes

  ঘ

  resonators and capacitors
• The number and characteristics of roofing filter are determined by modulation of the subscriber signal.
  ক

  True

  খ

  False
• The required active cancellation is equal to ____ between the maximum non distorting input signal and the radiation level at the antenna.
  ক

  half the difference

  খ

  the difference

  গ

  twice the difference

  ঘ

  the correlation
• In active radar blanking, communication between RF stage and rest of the communication system is ___ while the control line is ____
  ক

  on, inactive

  খ

  off, inactive

  গ

  off, active

  ঘ

  on, absent
• Active cancellation is the process of introducing transmitted signal in the _____ for subtraction from the input signal.
  ক

  transmitter

  খ

  low pass filter

  গ

  equalizer

  ঘ

  receiver
• Which of the following is a characteristic to be possessed by a roofing filter?
  ক

  Low insertion loss

  খ

  Fixed bandwidth

  গ

  High insertion loss and fixed bandwidth

  ঘ

  High insertion loss
• A _____filter establishes maximum and minimum possible level for processing.
  ক

  adaptive

  খ

  flooring

  গ

  roofing

  ঘ

  content
• ____ separates uplink and downlink.
  ক

  Frequency Division Duplexing

  খ

  Time Division Duplexing

  গ

  Frequency Division Multiplexing

  ঘ

  Time Division Multiplexing
• The ______ of out-of-band signal with bandpass characteristic of the receiver gives the interference in the receiver owing to out-of-band energy at the transmitter.
  ক

  correlation

  খ

  correlation and convolution

  গ

  integral

  ঘ

  convolution
• Which of the following is not used to control interference at RF?
  ক

  Programmable digital notch filters

  খ

  Active cancellation

  গ

  Frequency separation

  ঘ

  Antenna separation
• When ____ of N zero crossings count becomes small, a signal is considered to be present.
  ক

  mean

  খ

  correlation

  গ

  standard deviation

  ঘ

  variance
• In which technique RF is amplified until it is hard-limited into a square wave?
  ক

  Super heterodyne receiver

  খ

  One-bit direct conversion digital receiver

  গ

  Two-bit direct conversion digital receiver

  ঘ

  Phase crossing counter receiver
• Which of the following is a challenge for direct conversion receiver?
  ক

  GaAs circuitry

  খ

  CMOS circuitry

  গ

  LO leakage and DC bias

  ঘ

  Difference between CMOS and GaAs circuitry
• Direct conversion receiver is a heterodyne receiver.
  ক

  True

  খ

  False
• Which of the following is used in base station applications?
  ক

  Super heterodyne receiver

  খ

  Direct conversion receiver

  গ

  Digital-RF receiver

  ঘ

  Homodyne receiver
• Which of the following is not present in the conversion stages of super heterodyne receiver?
  ক

  Local oscillator

  খ

  Additional filter

  গ

  Step attenuator

  ঘ

  Amplifier