In amplitude modulation
, current power is adjusted to control instantaneous magnetron output.
If the amplitude term VP is varied, the resulting modulation is called as Amplitude Modulation
(AM), if f term is varied, the resulting modulation is called as Frequency Modulation (FM), and if F is varied, the resulting modulation is called as Phase Modulation (PM).
The amplitude modulation
and the phase modulation are sampled by different classes of electroreceptors and processed in parallel by the hindbrain (Rose et al.
The 210C, using Selectable Quadrature Amplitude Modulation
, allows data rates up to 54 Kbps in the narrow band channels.
According to the companies, this test, which was conducted across 2,200 kilometres of Segment F of the Reach North Asia Loop (RNAL), included Polarisation Multiplexed 8 Quadrature Amplitude Modulation
(PM-8QAM) and a range of advanced FlexCoherent modulation formats, along with transmitter and receiver-based signal processing technologies.
The 210M using Selectable Quadrature Amplitude Modulation
allows data rates up to 64.
Focusing more on the physics than the mathematics (though equations are included throughout), McCune begins the volume with discussion of the impact of Shannon capacity and ways its impact can be modulated, an overview of common issues and signal characterization, and individual chapters on digital amplitude modulation
, digital frequency modulation, and digital phase modulation.
Therefore the resonant precession frequency appears as an amplitude modulation
on the light power transmitted through the cesium vapor.
The systems are claimed to enable the best possible utilization of the frequency spectrum through 128 quadrature amplitude modulation