Context: Initially, the station's range was officially a 40 kilometres radius of the Alexandra Palace transmitter—in practice, however, transmissions could be picked up a good deal further away, and on one occasion in 1938 were picked up by engineers at RCA in New York, who were experimenting with a British television set.

Question: How far from its studio could the BBC's broadcast originally reach?
Answer: 40 kilometres

Question: In what year were BBC broadcasts seen in the United States?
Answer: 1938

Question: What company did the U.S. engineers who saw the BBC broadcast work for?
Answer: RCA

Question: What did the RCA employees use in order to receive the BBC signal?
Answer: a British television set

Question: What was 40 kilometers away from the Alexandra Palace transmitter?
Answer: Unanswerable

Question: What was picked up in 1940 by engineers at RCA in New York?
Answer: Unanswerable

Question: What were engineers experimenting with in Alexandra?
Answer: Unanswerable