A Suggestion for Spectrum Conservation

Frequency stability and reduced bandwidth of single sideband suppressed carrier transmissions are important factors which assist in easing the present crowding of the high frequency bands. Present channel assignments are ordinarily predicated upon a frequency stability of 0.01 per cent and double sideband amplitude modulation. By making the transition to accurate frequency control and minimum bandwidth of transmission, many additional channels are made available. Typical examples are charted from the aeronautical mobile bands to illustrate this point. Factors affecting channel allocation are discussed.