LectComposition of Ship Global Maritime and Security System radio equipment [1, 3, 5, 7, 12]

Impulse radiation

Sequence of non-P-modulated pulses

The second symbol indicates the nature (expressed in numbers) of the signal modulating the main carrier:

1. 
   lack of modulating signal.
   
2. 
   1 channel consisting of quantum or digital information without the use of subcarrier modulation;
   
3. 
   1 channel consisting of quantum or digital information using a subcarrier modulation; 3- 1 channel with analog information.
   

The third character indicates the type of information transmitted: N - Lack of information;
A - telegraph for hearing reception; B- telegraph for automatic reception; C-facsimile;
E-phone.

List of Radiation Classes Used in Maritime Communication:

A1A - telegraph with unquenchable vibrations (Morse code); A2A - telegraph with amplitude modulation (Morse code);
J3E - a single-band phone, with a weakened bottom carrier. For tadiotelephone in the MV / SV range.
Н3Е - single-band phone, full-carrier (only 2182 kHz is allowed).
R3E - single-band phone, partially attenuated carrier (for radiotelephone in the MV / SV range);
F3E - frequency modulated telephone (telephone exchange in the VHF range);
G3E - phase modulated telephone (telephone exchange in VHF range - TELECOM);
G2B - 1 canal consisting of quantum or digital information using phase modulation subcarrier modulator (VHF DSC);
F1B - frequency telegraphy (DSC, radiotelex, NAVTEX); J2B – letter, telegraph; cspedici teleqraf;
F1C - by facsimile direct carrier frequency modulation (black and white); F3C - analog faxmile;

PON - non-modulated pulse radiation

VHF	F3E
DSC	G2B
Radio telex	F1B
Radio telephone (less than 1605 kHZ)	H3E
Radio telephone (1605 kHZ and more)	J3E
Radio telepgraph	A1A

QUESTIONS

1. 
   English analogue of RLC?
   

2. What is modulation?

3. 
   Designation of two-way, three-channelVHF radiostation.
   

4. Requirements for dry batteries.

5. 
   To which device does the frequency 156,525 MHz belon