Key Topic 84: Signal Processing, Software, and Codes Flashcards
3-84M1: What is SDR?
A. Software Deviation Ratio.
B. Software Defined Radio.
C. SWR Meter.
D. Static Dynamic Ram.
B. Software Defined Radio.
3-84M2: What does the DSP not do in a modern DSP radio?
A. Control frequency.
B. Control modulation.
C. Control detection.
D. Control SWR.
D. Control SWR.
3-84M3: Which statement best describes the code used for GMDSS-DSC transmissions?
A. A 10 bit error correcting code starting with bits of data followed by a 3 bit error correcting code.
B. A 10 bit error correcting code starting with a 3 bit error correcting code followed by 7 bits of data.
C. An 8 bit code with 7 bits of data followed by a single parity bit.
D. A 7 bit code that is transmitted twice for error correction.
A. A 10 bit error correcting code starting with bits of data followed by a 3 bit error correcting code.
3-84M4: Which is the code used for SITOR-A and -B transmissions?
A. The 5 bit baudot telex code.
B. Each character consists of 7 bits with 3 “zeros” and 4 “ones”.
C. Each character consists of 7 bits with 4 “zeros” and 3 “ones”.
D. Each character has 7 bits of data and 3 bits for error correction.
C. Each character consists of 7 bits with 4 “zeros” and 3 “ones”.
3-84M5: Which of the following statements is true?
A. The Signal Repetition character (1001100) is used as a control signal in SITOR-ARQ.
B. The Idle Signal (a)(0000111) is used for FEC Phasing Signal 1.
C. The Idle Signal (b)(0011001) is used for FEC Phasing Signal 2.
D. The Control Signal 1 (0101100) is used to determine the time displacement in SITOR-B.
B. The Idle Signal (a)(0000111) is used for FEC Phasing Signal 1.
3-84M6: What principle allows multiple conversations to be able to share one radio channel on a GSM channel?
A. Frequency Division Multiplex.
B. Double sideband.
C. Time Division Multiplex.
D. None of the above.
C. Time Division Multiplex
