Recent

  • Show all results for ""
Coding Techniques in Digital Communications
40 Questions
2 Views

Coding Techniques in Digital Communications

Created by
@StrikingIodine

Questions and Answers

What is the EBCDIC code for the decimal value 9?

  • SPS (correct)
  • DEL
  • NL
  • HT

    • Which hexadecimal digit corresponds to the EBCDIC code 'C'?

  • A (correct)
  • B
  • 3
  • 9

    • What EBCDIC code is represented by the binary value '0100'?

  • RNL
  • STX
  • SEL (correct)
  • DC2

    • Which of the following EBCDIC codes corresponds to the first hexadecimal digit '5'?

    <p>LF</p> Signup and view all the answers

    What is the EBCDIC code represented by the binary number '1001'?

    <p>EM</p> Signup and view all the answers

    Which EBCDIC code represents the hexadecimal digit '4'?

    <p>d</p> Signup and view all the answers

    For the decimal value 0, what is the corresponding EBCDIC code?

    <p>NUL</p> Signup and view all the answers

    Which binary value represents the EBCDIC character for the decimal value 7?

    <p>0111</p> Signup and view all the answers

    Which character corresponds to the binary code 10000 in the Baudot code?

    <p>A</p> Signup and view all the answers

    What is the binary representation for the character 'G' in the Baudot code?

    <p>01011</p> Signup and view all the answers

    Which of the following symbols represents the binary code 01101 in the Baudot code?

    <p>)</p> Signup and view all the answers

    What character is represented by the binary code 11110 in the Baudot code?

    <p>K</p> Signup and view all the answers

    Which binary sequence corresponds to the character 'I' in the Baudot code?

    <p>01100</p> Signup and view all the answers

    What is the binary representation of the character 'D' in the Baudot code?

    <p>10001</p> Signup and view all the answers

    In the Baudot code, which character does the binary code 11100 represent?

    <p>C</p> Signup and view all the answers

    Which of the following characters has a binary representation starting with '0' in the Baudot code?

    <p>H</p> Signup and view all the answers

    What does the abbreviation 'CU1' stand for?

    <p>Customer Use 1</p> Signup and view all the answers

    Which of the following represents a function related to text formatting?

    <p>SPS</p> Signup and view all the answers

    What is the meaning of the abbreviation 'DEL'?

    <p>Delete</p> Signup and view all the answers

    Which abbreviation refers to the start of a data segment?

    <p>STX</p> Signup and view all the answers

    What does the abbreviation 'ENQ' signify?

    <p>Enquiry</p> Signup and view all the answers

    Which of the following corresponds to a control function for line breaks?

    <p>NL</p> Signup and view all the answers

    What does 'GES' represent in the context of device control?

    <p>There is no abbreviation 'GES' in the content</p> Signup and view all the answers

    Which abbreviation indicates a mode or state setting?

    <p>SM/SW</p> Signup and view all the answers

    How many quantization levels are used in a 2-bit quantization system?

    <p>4</p> Signup and view all the answers

    What is the magnitude of each quantized level in a 2-bit system with a full-scale voltage of 1 V?

    <p>0.25 V</p> Signup and view all the answers

    To improve the resolution of a digitizing system, what must be increased?

    <p>Number of quantization levels</p> Signup and view all the answers

    If the resolution is increased to 3 bits, how many possible values can the input signal be converted into?

    <p>8</p> Signup and view all the answers

    What is another method to improve the accuracy of a quantized signal aside from increasing the number of bits?

    <p>Increasing the sampling rate</p> Signup and view all the answers

    What happens to the quantized waveform when the sample rate is doubled with a 3-bit system?

    <p>The waveform is dramatically improved</p> Signup and view all the answers

    What represents the highest quantized value in a 3-bit quantization system with a full-scale voltage of 1 V?

    <p>1.0 V</p> Signup and view all the answers

    Which binary representation corresponds to the quantile interval of 0.4375 V in a 3-bit quantization system?

    <p>011</p> Signup and view all the answers

    How many bits of information can a 5-bit code transmit?

    <p>32 bits</p> Signup and view all the answers

    What does the transmission of a 11111 signify in the code system mentioned?

    <p>All following items are letters</p> Signup and view all the answers

    What is the primary characteristic of the Gray code?

    <p>One bit changes for each binary step</p> Signup and view all the answers

    In the context of Gray code, what is true when changing from the decimal value 7 to 8?

    <p>Only one bit changes</p> Signup and view all the answers

    Where is the Gray code commonly used?

    <p>Telemetry systems with slowly changing data</p> Signup and view all the answers

    Which of the codes discussed has a method for error detection in outputs?

    <p>Gray code</p> Signup and view all the answers

    What is represented by the Gray code 0011?

    <p>8</p> Signup and view all the answers

    What does the code 11011 signify when transmitted?

    <p>Start of figures</p> Signup and view all the answers

    Study Notes

    Coding Techniques in Digital Communications

    • EBCDIC (Extended Binary Coded Decimal Interchange Code) uses a 4-bit binary code for character representation.
    • Each character in EBCDIC combines a hexadecimal digit for encoded information, structured by four bit positions.
    • A total of 256 unique characters can be represented with EBCDIC due to its 8 bits of information (2^8).

    Baudot Code

    • The Baudot code is a 5-bit binary code designed to differentiate between letters and figures, with one common control sequence to indicate the type of data being sent.
    • Transmitting "letters" is done until the 5-bit sequence "11011" indicates a switch to figures.
    • No lowercase letters are included in the Baudot code, enhancing clarity during transmission.

    Gray Code

    • Gray code is a binary coding scheme where only one bit changes during each transition between decimal values from 0 to 9.
    • It is most effective in telemetry systems with slow-changing data, minimizing the risk of errors during data transmission.
    • Applications of Gray code include environments like temperature sensors (thermocouples), where stable readings are critical.

    Resolution and Quantization

    • Resolution indicates how distinct the quantized levels are in a digitizing system, quantified by the number of bits (n).
    • For a 2-bit system, 4 quantized levels can be achieved, while increasing resolution to 3 bits enables 8 possible values (2^n).
    • A direct relationship exists between the number of quantization levels and accuracy; more bits lead to better resolution.

    Improvements in Signal Processing

    • To enhance the digital signal's quality, one can increase either the number of bits or the sampling rate.
    • Doubling the sample rate while using a fixed number of bits can significantly improve the resulting signal's integrity.
    • An example application features voltage levels represented as quantile intervals, illustrating how voltage values correspond to specific binary representations for quantization.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Explore the various coding techniques used in digital communications, including EBCDIC, Baudot Code, and Gray Code. This quiz delves into the structure, applications, and advantages of these coding systems in data transmission. Test your knowledge on how these codes function and their significance in communication technology.

    More Quizzes Like This

    Tekensets en hun representatie
    4 questions

    Tekensets en hun representatie

    LightHeartedLapisLazuli avatar
    LightHeartedLapisLazuli
    Digital Signal Processing Concepts Quiz
    18 questions

    Digital Signal Processing Concepts Quiz

    CongenialButtercup avatar
    CongenialButtercup
    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser