>97.307(a): No amateur station transmission shall occupy more bandwidth
>than necessary for the information rate and emission type being transmitted,
>in accordance with good amateur practice.
>97.307(b): Emissions resulting from modulation must be confined to the
>band or segment available to the control operator. Emissions outside the
>necessary bandwidth mustnot cause splatter or keyclick inteference to
>operations on adjacent frequencies.
>97.307(c): All spurious emissions....must be reduced to the greatest
>97.307(d) The mean power of any spurious emission from a station transmitter
>or external RF power amplifier transmitting on a frequency below 30MHz must
>not exceed 50mW, and must be at least 40dB below the mean power of the
? The cleanest SSB Ham transceiver that I ever measured was 38db down.
>There is no bandwidth specification for phone transmissions, other than the
>general requirement of "Good Engineering Practice", cited in 97.101(A).
>Common practice assumes that a SSB signal occupies a 3KHz wide band, and
>that double sideband AM occupies 6KHz.
>Discussion of someone's 12KHz wide AM signal is irrelevant, although it does
>engender debate about "reasonable and proper" bandwidth.
>CONCLUSION: Audible splatter is prohibited, even where it remains in-band