The two systems were to run on a trial basis for six months; early television sets supported both resolutions. However, the Baird system, which used a mechanical camera for filmed programming and Farnsworth image dissector cameras for live programming, proved too cumbersome and visually inferior, and ended with closedown (at 22:00) on Saturday 13 February 1937.  COUNT 3
QSN1 For how long did the BBC alternate different broadcasting systems? ANS1 six months QSN2 What kind of camera was used to broadcast live shows under the Baird system? ANS2 Farnsworth image dissector QSN3 When was the Baird system officially abandoned? ANS3 13 February 1937