Abstract :
In order to investigate the feasibility of increasing the number of channels presently available in the 152-174 mc band, a group of tests were conducted to compare the operation of 30 kc and 20 kc channel spacing systems with the present standard 60 kc equipment. On the basis of a chosen set of system parameters, the performance is continuously degraded by decreasing the channel spacing. This investigation considers effects of impulse noise, system stability, adjacent channel interference and intermodulation.
