Update for 12-11-21 14:15

tech/Modulation.wiki

@@ -8,3 +8,48 @@ in everything from raido, to Ethernet.
 Bandwidth is the amount of frequencies that a signal occupies. For example, the
 Human voice can make frequencies from 300Hz to 3000Hz, therefore having a
 bandwidth of 3000 - 300 = 2700Hz. 
+
+== Types of Modulation ==
+
+=== CW ===
+
+Bandwidth: 150hz
+
+Continuous Wave of CW is a type of signal where the pulsing of the signal
+encoded information, instead of modifying the carrier signal. An example of
+this is Morse code. Due to how concentrated the signal is, CW is used for
+extreme ranges.
+
+=== AM ===
+
+Bandwidth: 6khz (voice); 10khz (broadcast)
+
+Amplitude Modulation of AM is a form of modulation where the amplitude of the
+signal is changed to encode information. The signal as a result will take up
+space both above and below the carrier, called Upper Side Band (USB) and Lower
+Side Band (LSB).
+
+=== SSB ===
+
+Bandwidth: 2-3khz (voice); 500-3000hz (digital)
+
+Single Side Band (SSB) Is when an AM signal is encoded by only modulating one
+part of the signal, and leaving the other unchanged. This allows for less
+bandwidth use for the same information.
+
+Due to SSB concentrating the same amount of power for the signal into a
+narrower portion of the signal, it is often used for long distance VHF and UHF
+(see [[frequency_range]]). 
+
+Standards have formed around SSB, and wether to use USB or LSB on different
+frequencies. If < 10Mhz, LSB. Else if >= 10Mhz, USB.
+
+=== FM/PM ===
+
+Bandwidth: 10-15khz (voice); 150khz (broadcast)
+
+Frequency Modulation (FM) and Phase Modulation (PM) are two similar types of
+modulation where the signal is encoded by changing either the frequency of the
+signal, or the phase of the signal.
+
+