3-M-084: Signal Processing, Software and Codes
3-84M1:
What is a SDR?
Software Defined Radio.
Software Deviation Ratio.
SWR Meter.
Static Dynamic Ram.
3-84M2:
What does the DSP not do in a modern DSP radio?
Control SWR.
Control frequency.
Control modulation.
Control detection.
3-84M3:
Which statement best describes the code used for GMDSS-DSC transmissions?
A 10 bit error correcting code starting with bits of data followed by a 3 bit error correcting code.
A 10 bit error correcting code starting with a 3 bit error correcting code followed by 7 bits of data.
An 8 bit code with 7 bits of data followed by a single parity bit.
A 7 bit code that is transmitted twice for error correction.
3-84M4:
Which is the code used for SITOR-A and -B transmissions?
Each character consists of 7 bits with 4 “zeros” and 3 “ones”.
The 5 bit baudot telex code.
Each character consists of 7 bits with 3 “zeros” and 4 “ones”.
Each character has 7 bits of data and 3 bits for error correction.
3-84M5:
Which of the following statements is true?
The Idle Signal (a) (0000111) is used for FEC Phasing Signal 1.
The Signal Repetition character (1001100) is used as a control signal in SITOR-ARQ.
The Idle Signal (b) (0011001) is used for FEC Phasing Signal 2.
The Control Signal 1 (0101100) is used to determine the time displacement in SITOR-B.
3-84M6:
What principle allows multiple conversations to be able to share one radio channel on a GSM channel?
Time Division Multiplex.
Frequency Division Multiplex.
Double sideband.
None of the above.
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