Complex sentence: III radar with a new oscillator fitted to the transmitter, it was first tested in July 1940, and proved itself by detecting aircraft at a range of-the operator had to pick up the signals on two cathode-ray tubes in the cockpit.
Split into simpler sentences: III radar with a new oscillator fitted to the transmitter, it was first tested in July 1940, and proved itself by detecting aircraft at a range of. To use it, the operator had to pick up the signals on two cathode-ray tubes in the cockpit.