Emission    Main Carrier  Transmission Type            Other Details
Designator  Modulation
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  A0        Amplitude     Unmodulated
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  A1        Amplitude     On-Off keyed telegraphy
                          (no audio freq. modulation)
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  A2        Amplitude     On-Off keyed telegraphy
                          (amplitude modulated audio
                          freq. or freqs.)
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  A3        Amplitude     Telephony                    Double sideband, 
                                                       full carrier
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  A4        Amplitude     Facsimile (modulation of
                          main carrier directly or by 
                          freq. modulated subcarrier)
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  A5(C)     Amplitude     Television                   Vestigial sideband
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  F0        Frequency*    Unmodulated
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  F1        Frequency*    Telegraphy (FSK, i.e., one
                          of two freqs. at any instant)
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  F2        Frequency*    Telegraphy (on-off keying of
                          a freq. modulating audio freq)
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  F3        Frequency*    Telephony
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  F4        Frequency*    Facsilile by direct freq
                          modulation of the carrier
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  F5        Frequency*    Television
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*Can also be phase modulation