Complex sentence: In early 1923, the United States expanded its broadcast station allocations to a continuous band of 81 frequencies, in 10 kHz steps from 550 to 1350, with stations now using a single frequency, no longer having to broadcast entertainment and official reports on different frequencies.
Split into simpler sentences: In early 1923, the United States expanded its broadcast station allocations to a continuous band of 81 frequencies, in 10 kHz steps from 550 to 1350. Stations could begin using a single frequency, no longer having to broadcast entertainment and official reports on different frequencies.