What is the correct sequence of emissions for AM-Voice DSB, SSB-Voice without carrier, USB-Voice with carrier, and FM-Voice?

The correct sequence of emissions is A3E, J3E, H3E, and F3E, which corresponds to AM-Voice DSB, SSB-Voice without carrier, USB-Voice with carrier, and FM-Voice respectively.

AM-Voice DSB (A3E) is the first emission in the sequence because it operates by modulating the amplitude of a carrier wave with an audio signal. This standard modulation method is commonly used for voice broadcasting, especially in traditional AM radio broadcasting.

Following A3E, SSB-Voice without carrier (J3E) comes next. In SSB (Single Sideband), one of the sidebands is suppressed, which improves the efficiency of the transmission and utilizes bandwidth better than conventional AM methods. SSB is widely used in marine and aircraft communications.

Next in the sequence is USB-Voice with carrier (H3E). This is similar to SSB but includes a carrier component, making it a different form of transmission. The carrier is used to facilitate the demodulation process in certain contexts, particularly in commercial communications.

Finally, FM-Voice (F3E) is at the end of the sequence. Frequency modulation differs from amplitude modulation by varying the frequency of the