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The carrier frequency is 1.25 MHz above the lower edge of the 6 MHz wide channel. This effectively makes the system AM at low modulation frequencies and SSB at high modulation frequencies. The absence of the lower sideband components at high frequencies must be compensated for, and this is done in the IF amplifier.
Amateur radio or ham radio is a hobby that is practised by over 16,000 licensed users in India. [1] Licences are granted by the Wireless and Planning and Coordination Wing (WPC), a branch of the Ministry of Communications and Information Technology. In addition, the WPC allocates frequency spectrum in India.
The 10-meter band is a portion of the shortwave radio spectrum internationally allocated to amateur radio and amateur satellite use on a primary basis. The band consists of frequencies stretching from 28.000 to 29.700 MHz.
Specific frequency allocations vary from country to country and between ITU regions as specified in the current ITU HF frequency allocations for amateur radio. [1] The list of frequency ranges is called a band allocation, which may be set by international agreements, and national regulations. The modes and types of allocations within each ...
2,304.1 MHz Region 2 CW & SSB calling frequency [2]; 2,320.2 MHz Region 1 Narrow-band calling frequency [3]; 2.400–2.485 GHz: Spread Spectrum band for general radio-controlled aircraft recreational use (amateur radio license holders have 2.39–2.45 GHz licensed for their general use in the USA) and using both frequency-hopping spread spectrum and direct-sequence spread spectrum RF ...
A Compatible sideband transmission, also known as amplitude modulation equivalent (AME) or Single sideband reduced-carrier (SSB-RC), is a type of single sideband RF modulation in which the carrier is deliberately reinserted at a lower level after its normal suppression to permit reception by conventional AM receivers. The general convention is ...
Shortwave bands are frequency allocations for use within the shortwave radio spectrum (the upper medium frequency [MF] band and all of the high frequency [HF] band). Radio waves in these frequency ranges can be used for very long distance (transcontinental) communication because they can reflect off layers of charged particles in the ionosphere and return to Earth beyond the horizon, a ...
6.925 MHz (pirate radio) USB 40 meters: 7.171 MHz (7.165 in Europe) LSB 40 meters: 7.18 MHz (New suggested frequency to include General Class licensees) LSB 40 meters: 7.214 MHz Australian digital SSTV frequency (Easypal and DIGTRX) LSB 20 meters: 14.23 MHz Frequency 1 analog: USB 20 meters: 14.233 MHz Frequency 2 analog to alleviate crowding ...