Login or Register for FREE!
Login or Register for FREE!
Subel. J
6 questions
Element 7 (Valid until Apr 6, 2022)
Subelement J

MF-HF Equip. and Comms:

Section 88

MF-HF SITOR (NBDP) Technical Characteristics:

Which of the following statements concerning SITOR (NBDP) communications is true?

  • ARQ transmissions are acknowledged by the Information Receiving Station only at the end of the message.
  • Correct Answer
    ARQ transmissions are made in data groups consisting of three-character blocks.
  • ARQ communications rely upon error correction by time diversity transmission and reception.
  • Forward error correction is an interactive mode.
This question does not yet have an explanation! Register to add one

Tags: none

Which of the following statements concerning SITOR (NBDP) communications is true?

  • FEC transmissions are made in data groups consisting of three-character blocks.
  • FEC transmissions require a "phasing" or "handshaking" process prior to character transmission.
  • Correct Answer
    FEC transmissions rely upon an error correction technique, which transmits each character twice.
  • FEC transmissions rely upon parity and "repeat requests" to ensure error correction.
This question does not yet have an explanation! Register to add one

Tags: none

Which statement best defines the SITOR (NBDP) acronym "ARQ"?

  • Error Correction when 2 stations are in direct & phased telephone communications with each other.
  • Error correction for one-way TELEX transmissions to a single other station.
  • Error correction for one-way TELEX broadcasts of weather or navigation information.
  • Correct Answer
    Error Correction with 2 stations are in direct & phased TELEX communications with each other.
This question does not yet have an explanation! Register to add one

Tags: none

Which statement best defines the SITOR (NBDP) acronym "BFEC"?

  • Correct Answer
    Error correction for one-way TELEX broadcasts of weather or navigation information.
  • Error Correction when 2 stations are in direct & phased telephone communications with each other.
  • Error Correction when 2 stations are in direct & phased TELEX communications with each other.
  • Error correction when 1 station sends a one-way TELEX to a single other station.
This question does not yet have an explanation! Register to add one

Tags: none

The purpose of "parity" in SITOR (NBDP) communications is?

  • Error correction in HF BFEC MSI broadcasts, SFEC NAVTEX broadcasts and two way ARQ exchanges.
  • Error correction in SFEC NAVTEX broadcasts, HF SFEC MSI broadcasts and two-way ARQ exchanges.
  • Error correction in BFEC NAVTEX broadcasts, HF BFEC MSI broadcasts and one-way ARQ broadcasts.
  • Correct Answer
    Error correction in HF BFEC MSI broadcasts, NAVTEX broadcasts and two-way ARQ exchanges.
This question does not yet have an explanation! Register to add one

Tags: none

"SITOR (NBDP)" communications are based on a digital code system:

  • Correct Answer
    Consisting of 7 bits, with four zeros and three ones.
  • Consisting of 7 bits, with four ones and three zeroes.
  • Consisting of 5 bits TELEX and 8 bits Fax.
  • Consisting of 5 bits for ship stations and 7 bits for shore stations.
This question does not yet have an explanation! Register to add one

Tags: none

Go to 87 Go to 89
HamStudy.org™ is copyright 2024 Signal Stuff™, All rights reserved.
View Privacy Policy    |    Get help with HamStudy.org™